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Hou X, Wang R, Zhang C, Xu Y, Zhu S, Zhang Y, Liu X, Che Y. Rogersonins C-F, 9 H-Imidazo[2,1- i]purine-Incorporating Adenine-Polyketide Hybrids from an Ophiocordyceps-Associated Clonostachys rogersoniana. JOURNAL OF NATURAL PRODUCTS 2024; 87:1618-1627. [PMID: 38887968 DOI: 10.1021/acs.jnatprod.4c00266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/20/2024]
Abstract
Rogersonins C-F (1-4), four unprecedented adenine-polyketide hybrids featuring a rare 9H-imidazo[2,1-i]purine (1,N6-ethenoadenine) moiety, were isolated from an Ophiocordyceps-associated fungus, Clonostachys rogersoniana. Their structures were elucidated primarily by NMR experiments. The absolute configurations of 1-4 were assigned by a combination of the modified Mosher method, chemical degradation, electronic circular dichroism (ECD) calculations, and X-ray crystallography using Cu Kα radiation. Compound 3 downregulated the expression of PD-L1 protein in MDA-MB-231 and A549 cells, but did not show detectable effect on mRNA transcription of the PD-L1-encoding gene CD274.
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Affiliation(s)
- Xintong Hou
- State Key Laboratory of Bioactive Substance & Function of Natural Medicines, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, People's Republic of China
| | - Ruikun Wang
- State Key Laboratory of Bioactive Substance & Function of Natural Medicines, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, People's Republic of China
| | - Chunyan Zhang
- State Key Laboratory of Bioactive Substance & Function of Natural Medicines, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, People's Republic of China
| | - Yang Xu
- State Key Laboratory of Bioactive Substance & Function of Natural Medicines, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, People's Republic of China
| | - Shuaiming Zhu
- State Key Laboratory of Toxicology & Medical Countermeasures, Beijing Institute of Pharmacology & Toxicology, Beijing 100850, People's Republic of China
| | - Yang Zhang
- State Key Laboratory of Toxicology & Medical Countermeasures, Beijing Institute of Pharmacology & Toxicology, Beijing 100850, People's Republic of China
| | - Xingzhong Liu
- Department of Microbiology, College of Life Sciences, Nankai University, Tianjin 300071, People's Republic of China
| | - Yongsheng Che
- State Key Laboratory of Bioactive Substance & Function of Natural Medicines, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, People's Republic of China
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2
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Feineis D, Bringmann G. Structural variety and pharmacological potential of naphthylisoquinoline alkaloids. THE ALKALOIDS. CHEMISTRY AND BIOLOGY 2024; 91:1-410. [PMID: 38811064 DOI: 10.1016/bs.alkal.2024.03.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2024]
Abstract
Naphthylisoquinoline alkaloids are a fascinating class of natural biaryl compounds. They show characteristic mono- and dimeric scaffolds, with chiral axes and stereogenic centers. Since the appearance of the last comprehensive overview on these secondary plant metabolites in this series in 1995, the number of discovered representatives has tremendously increased to more than 280 examples known today. Many novel-type compounds have meanwhile been discovered, among them naphthylisoquinoline-related follow-up products like e.g., the first seco-type (i.e., ring-opened) and ring-contracted analogues. As highlighted in this review, the knowledge on the broad structural chemodiversity of naphthylisoquinoline alkaloids has been decisively driven forward by extensive phytochemical studies on the metabolite pattern of Ancistrocladus abbreviatus from Coastal West Africa, which is a particularly "creative" plant. These investigations furnished a considerable number of more than 80-mostly new-natural products from this single species, with promising antiplasmodial activities and with pronounced cytotoxic effects against human leukemia, pancreatic, cervical, and breast cancer cells. Another unique feature of naphthylisoquinoline alkaloids is their unprecedented biosynthetic origin from polyketidic precursors and not, as usual for isoquinoline alkaloids, from aromatic amino acids-a striking example of biosynthetic convergence in nature. Furthermore, remarkable botanical results are presented on the natural producers of naphthylisoquinoline alkaloids, the paleotropical Dioncophyllaceae and Ancistrocladaceae lianas, including first investigations on the chemoecological role of these plant metabolites and their storage and accumulation in particular plant organs.
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Affiliation(s)
- Doris Feineis
- Institute of Organic Chemistry, University of Würzburg, Würzburg, Germany
| | - Gerhard Bringmann
- Institute of Organic Chemistry, University of Würzburg, Würzburg, Germany.
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3
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Zhang T, Tian CY, Zhang J, An Q, Yi P, Yuan CM, Zhang ZK, Zhao LH, Hao XJ, Hu ZX. Quinolizidine Alkaloids and Isoflavones from the Herb of Thermopsis lupinoides and Their Antiviral, Antifungal, and Insecticidal Activities. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:5047-5061. [PMID: 38394631 DOI: 10.1021/acs.jafc.3c09529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/25/2024]
Abstract
As part of our ongoing investigation of natural bioactive substances from the genus Thermopsis of the tribe Fabaceae for agricultural protection, the chemical constituents of the herb Thermopsis lupinoides were systematically investigated, which led to the isolation of 39 quinolizidine alkaloids (QAs) (1-39), including 14 new QAs (1-14) and 14 isoflavones (40-53). Their structures were elucidated through comprehensive spectroscopic data analysis (IR, UV, NMR, HRESIMS), ECD calculations, and X-ray crystallography. The antitomato spotted wilt virus (TSWV) and antifungal (against Botrytis cinerea, Gibberella zeae, Phytophythora capsica, and Alternaria alternata) and insecticidal (against Aphis fabae and Tetranychus urticae) activities of the isolated compounds were screened using the lesion counting method, mycelial inhibition assay, and spray method, respectively. The bioassay results showed that 34 exhibited excellent protective activity against TSWV, with an EC50 value of 36.04 μg/mL, which was better than that of the positive control, ningnanmycin (86.03 μg/mL). The preliminary mechanistic exploration illustrated that 34 induced systemic acquired resistance in the host plant by acting on the salicylic acid signaling pathway. Moreover, 1 showed significant antifungal activity against B. cinerea (EC50 value of 20.83 μg/mL), while 2 exhibited good insecticidal activity against A. fabae (LC50 value of 24.97 μg/mL). This research is promising for the invention of novel pesticides from QAs with high efficiency and satisfactory ecological compatibility.
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Affiliation(s)
- Tong Zhang
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China
- Natural Products Research Center of Guizhou Province, Guiyang 550014, China
- School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550025, China
| | - Cai-Yan Tian
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China
- Natural Products Research Center of Guizhou Province, Guiyang 550014, China
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China
| | - Ji Zhang
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China
- Natural Products Research Center of Guizhou Province, Guiyang 550014, China
- School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550025, China
| | - Qiao An
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China
- Natural Products Research Center of Guizhou Province, Guiyang 550014, China
| | - Ping Yi
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China
- Natural Products Research Center of Guizhou Province, Guiyang 550014, China
| | - Chun-Mao Yuan
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China
- Natural Products Research Center of Guizhou Province, Guiyang 550014, China
| | - Zhong-Kai Zhang
- The Institute of Biotechnology and Germplasm Resources, Yunnan Academy of Agricultural Sciences, Kunming 650204, China
| | - Li-Hua Zhao
- The Institute of Biotechnology and Germplasm Resources, Yunnan Academy of Agricultural Sciences, Kunming 650204, China
| | - Xiao-Jiang Hao
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China
- Natural Products Research Center of Guizhou Province, Guiyang 550014, China
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Science, Kunming 650201, China
| | - Zhan-Xing Hu
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China
- Natural Products Research Center of Guizhou Province, Guiyang 550014, China
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Nguyen LH, Nguyen TH, Tran VH, Litaudon M, Nguyen VT, Doan TMH, Pham VC. Five undescribed aryltetralin lignans with cytotoxic activities from the fruits of Cleistanthus eberhardtii. Fitoterapia 2024; 173:105826. [PMID: 38219842 DOI: 10.1016/j.fitote.2024.105826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 01/08/2024] [Accepted: 01/11/2024] [Indexed: 01/16/2024]
Abstract
Five undescribed lignans, cleiseberharnins A-D (1-4), cleiseberharside A (5) were isolated from the fruits of Cleistanthus eberhartii (Phyllanthaceae), together with six known aryltetralin lignans, cleistantoxin (6), picroburseranin (7), neocleistantoxin (8), 7-hydroxypicropolygamain (9), cleisindoside D (10), and cleisindoside A (11). Their structures and relative configurations were established by analysis of HRESIMS and NMR data, and quantum chemical calculations of JH,H coupling constants. The absolute configurations of 1-5 were determined by analysis of their experimental CD spectra and comparison with calculated electronic circular dichroism (ECD) spectra. All compounds (1-11) were evaluated for their cytotoxicity against KB, MCF-7, HepG-2, and Lu-1 human cancer cell lines. Among the tested compounds, compounds 6 and 7 showed strong activity against KB, MCF7, HepG2 and Lu-1 cell lines with IC50 values in the range of 0.02-0.62 μM. Compound 1 showed activity against three cancer cell lines KB, HepG2, and Lu-1 with IC50 values of 6.98, 7.61 and 11.75 μM, respectively. Compound 2 exhibited a selective inhibition with moderate cytotoxicity against Lu-1 with IC50 value of 15.30 μM. Compounds 4, 5 and 9 showed moderate activity against the three cancer cell lines with IC50 values in the range of 8.73-19.70 μM.
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Affiliation(s)
- Lam Hong Nguyen
- Institute of Marine Biochemistry of the Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Caugiay, Hanoi, Viet Nam; Hanoi University of Pharmacy, 13 Le Thanh Tong, Hoankiem, Hanoi, Viet Nam
| | - Thi Hue Nguyen
- Institute of Marine Biochemistry of the Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Caugiay, Hanoi, Viet Nam
| | - Viet Hung Tran
- Institute of Drug Quality Control - Ho Chi Minh City, 200 Co Bac Street, Co Giang Ward, District 1, Ho Chi Minh City, Viet Nam
| | - Marc Litaudon
- Institut de Chimie des Substances Naturelles, CNRS-ICSN, UPR 2301, Université Paris-Saclay, 91198 Gif-sur-Yvette, France
| | - Van Thanh Nguyen
- Institute of Marine Biochemistry of the Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Caugiay, Hanoi, Viet Nam
| | - Thi Mai Huong Doan
- Institute of Marine Biochemistry of the Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Caugiay, Hanoi, Viet Nam; Graduate University of Science and Technology, VAST, 18 Hoang Quoc Viet, Caugiay, Hanoi, Viet Nam.
| | - Van Cuong Pham
- Institute of Marine Biochemistry of the Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Caugiay, Hanoi, Viet Nam; Graduate University of Science and Technology, VAST, 18 Hoang Quoc Viet, Caugiay, Hanoi, Viet Nam.
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5
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Cai G, Hu X, Zhang R, Wang J, Fang X, Pang X, Bai J, Zhang T, Zhang T, Lv H, You X, He W, Yu L. Subplenones A-J: Dimeric Xanthones with Antibacterial Activity from the Endophytic Fungus Subplenodomus sp. CPCC 401465. JOURNAL OF NATURAL PRODUCTS 2023; 86:2474-2486. [PMID: 37862150 DOI: 10.1021/acs.jnatprod.3c00628] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2023]
Abstract
Subplenones A-J (1-10), 10 new xanthone dimers, have been isolated and characterized from the endophytic fungus Subplenodomus sp. CPCC 401465, which resides within the Chinese medicinal plant Gentiana straminea. The isolation process was guided by antibacterial assays and molecular-networking-based analyses. The chemical structures of these compounds were elucidated through the interpretation of nuclear magnetic resonance (NMR) and high-resolution electrospray ionization mass spectrometry (HRESIMS) data. Furthermore, the relative configuration of the compounds was determined using NMR and single-crystal X-ray diffraction analyses, and the absolute configuration was established using electronic circular dichroism calculations. All of the isolated compounds exhibited significant inhibitory activity against Gram-positive bacteria. Notably, compounds 1, 5, and 7 displayed remarkable inhibitory activity against methicillin-resistant Staphylococcus aureus (MRSA) ATCC 700698, with a minimum inhibitory concentration (MIC) of 0.25 μg/mL, and against vancomycin-resistant Enterococcus faecium (VRE) ATCC 700221, with MIC values ranging from 0.5 to 1.0 μg/mL.
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Affiliation(s)
- Guowei Cai
- China Pharmaceutical Culture Collection, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, People's Republic of China
| | - Xinxin Hu
- Division for Medicinal Microorganisms Related Strains, CAMS Collection Center of Pathogenic Microorganisms, Beijing 100050, People's Republic of China
| | - Ran Zhang
- China Pharmaceutical Culture Collection, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, People's Republic of China
| | - JuXian Wang
- Department of Chemistry, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, People's Republic of China
| | - Xiaomei Fang
- China Pharmaceutical Culture Collection, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, People's Republic of China
- Division for Medicinal Microorganisms Related Strains, CAMS Collection Center of Pathogenic Microorganisms, Beijing 100050, People's Republic of China
| | - Xu Pang
- China Pharmaceutical Culture Collection, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, People's Republic of China
| | - Jinglin Bai
- China Pharmaceutical Culture Collection, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, People's Republic of China
- Division for Medicinal Microorganisms Related Strains, CAMS Collection Center of Pathogenic Microorganisms, Beijing 100050, People's Republic of China
| | - Tao Zhang
- China Pharmaceutical Culture Collection, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, People's Republic of China
| | - Tao Zhang
- China Pharmaceutical Culture Collection, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, People's Republic of China
- Division for Medicinal Microorganisms Related Strains, CAMS Collection Center of Pathogenic Microorganisms, Beijing 100050, People's Republic of China
| | - Hui Lv
- China Pharmaceutical Culture Collection, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, People's Republic of China
| | - Xuefu You
- Division for Medicinal Microorganisms Related Strains, CAMS Collection Center of Pathogenic Microorganisms, Beijing 100050, People's Republic of China
| | - Wenni He
- China Pharmaceutical Culture Collection, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, People's Republic of China
| | - Liyan Yu
- China Pharmaceutical Culture Collection, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, People's Republic of China
- Division for Medicinal Microorganisms Related Strains, CAMS Collection Center of Pathogenic Microorganisms, Beijing 100050, People's Republic of China
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6
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Fu P, Zhang Y, Wang C, Si S, Liu X, Che Y. Altersteroids A-D, 9,11-Secosteroid-Derived γ-Lactones from an Alternaria sp. JOURNAL OF NATURAL PRODUCTS 2023; 86:604-611. [PMID: 36693727 DOI: 10.1021/acs.jnatprod.2c00975] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Altersteroids A-D (1-4), four new 9,11-secosteroid-derived γ-lactones, were isolated from cultures of the ascomycete fungus Alternaria sp. Their structures were elucidated primarily by NMR experiments. The absolute configuration of 1 was established by X-ray crystallographic analysis of its di-p-nitrobenzenesulfonate 1a using Cu Kα radiation, whereas those for 2-4 were assigned by quantum-chemical calculations. Compounds 1-4 incorporate a γ-lactone moiety fused to the steroid D ring at C-13/C-14. Compound 3 showed moderate cytotoxicity toward four tumor cell lines and induced an apoptotic process in A549 cells. Notably, compound 3 showed equipotent activity against the cisplatin-sensitive MB49 and -resistant MB49 CisR cells, with an IC50 value of 12.7 μM.
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Affiliation(s)
- Peinan Fu
- NHC Key Laboratory of Biotechnology of Antibiotics, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, People's Republic of China
| | - Yang Zhang
- State Key Laboratory of Toxicology & Medical Countermeasures, Beijing Institute of Pharmacology & Toxicology, Beijing 100850, People's Republic of China
| | - Chenyin Wang
- NHC Key Laboratory of Biotechnology of Antibiotics, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, People's Republic of China
| | - Shuyi Si
- NHC Key Laboratory of Biotechnology of Antibiotics, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, People's Republic of China
| | - Xingzhong Liu
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, People's Republic of China
| | - Yongsheng Che
- NHC Key Laboratory of Biotechnology of Antibiotics, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, People's Republic of China
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Wu J, Shui H, Zhang M, Zeng Y, Zheng M, Zhu KK, Wang SB, Bi H, Hong K, Cai YS. Aculeaxanthones A-E, new xanthones from the marine-derived fungus Aspergillus aculeatinus WHUF0198. Front Microbiol 2023; 14:1138830. [PMID: 36922969 PMCID: PMC10008875 DOI: 10.3389/fmicb.2023.1138830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 02/07/2023] [Indexed: 03/03/2023] Open
Abstract
Introduction Dimeric natural products are widespread in plants and microorganisms, which usually have complex structures and exhibit greater bioactivities than their corresponding monomers. In this study, we report five new dimeric tetrahydroxanthones, aculeaxanthones A-E (4-8), along with the homodimeric tetrahydroxanthone secalonic acid D (1), chrysoxanthones B and C (2 and 3), and 4-4'-secalonic acid D (9), from different fermentation batches of the title fungus. Methods A part of the culture was added to a total of 60 flasks containing 300 ml each of number II fungus liquid medium and culture 4 weeks in a static state at 28˚C. The liquid phase (18 L) and mycelia was separated from the fungal culture by filtering. A crude extract was obtained from the mycelia by ultrasound using acetone. To obtain a dry extract (18 g), the liquid phase combined with the crude extract were further extracted by EtOAc and concentrated in vacuo. The MIC of anaerobic bacteria was examined by a broth microdilution assay. To obtain MICs for aerobic bacteria, the agar dilution streak method recommended in Clinical and Laboratory Standards Institute document (CLSI) M07-A10 was used. Compounds 1-9 was tested against the Bel-7402, A-549 and HCT-116 cell lines according to MTT assay. Results and Discussion The structures of these compounds were elucidated on the base of 1D and 2D NMR and HR-ESIMS data, and the absolute configurations of the new xanthones 4-8 were determined by conformational analysis and time-dependent density functional theory-electronic circular dichroism (TDDFT-ECD) calculations. Compounds 1-9 were tested for cytotoxicity against the Bel-7402, A549, and HCT-116 cancer cell lines. Of the dimeric tetrahydroxanthone derivatives, only compound 6 provided cytotoxicity effect against Bel-7402 cell line (IC50, 1.96 µM). Additionally, antimicrobial activity was evaluated for all dimeric tetrahydroxanthones, including four Gram-positive bacteria including Enterococcus faecium ATCC 19434, Bacillus subtilis 168, Staphylococcus aureus ATCC 25923 and MRSA USA300; four Gram-negative bacteria, including Helicobacter pylori 129, G27, as well as 26,695, and multi drug-resistant strain H. pylori 159, and one Mycobacterium M. smegmatis ATCC 607. However, only compound 1 performed activities against H. pylori G27, H. pylori 26695, H. pylori 129, H. pylori 159, S. aureus USA300, and B. subtilis 168 with MIC values of 4.0, 4.0, 2.0, 2.0, 2.0 and 1.0 μg/mL, respectively.
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Affiliation(s)
- Jun Wu
- Department of Nephrology, Zhongnan Hospital of Wuhan University, School of Pharmaceutical Sciences, Wuhan University, Wuhan, China
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and School of Pharmaceutical Sciences, Wuhan University, Wuhan, China
| | - Hua Shui
- Department of Nephrology, Zhongnan Hospital of Wuhan University, School of Pharmaceutical Sciences, Wuhan University, Wuhan, China
| | - Mengke Zhang
- Department of Pharmacy, Renmin Hospital of Wuhan University, Wuhan, China
| | - Yida Zeng
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and School of Pharmaceutical Sciences, Wuhan University, Wuhan, China
| | - Mingxin Zheng
- Department of Pathogen Biology & Jiangsu Key Laboratory of Pathogen Biology & Helicobacter pylori Research Centre, Nanjing Medical University, Nanjing, China
| | - Kong-Kai Zhu
- Advanced Medical Research Institute, Shandong University, Jinan, Shandong, China
| | - Shou-Bao Wang
- Beijing Key Laboratory of Drug Targets Identification and Drug Screening, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Hongkai Bi
- Department of Pathogen Biology & Jiangsu Key Laboratory of Pathogen Biology & Helicobacter pylori Research Centre, Nanjing Medical University, Nanjing, China
| | - Kui Hong
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and School of Pharmaceutical Sciences, Wuhan University, Wuhan, China
| | - You-Sheng Cai
- Department of Nephrology, Zhongnan Hospital of Wuhan University, School of Pharmaceutical Sciences, Wuhan University, Wuhan, China
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and School of Pharmaceutical Sciences, Wuhan University, Wuhan, China
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8
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Feineis D, Bringmann G. Asian Ancistrocladus Lianas as Creative Producers of Naphthylisoquinoline Alkaloids. PROGRESS IN THE CHEMISTRY OF ORGANIC NATURAL PRODUCTS 2023; 119:1-335. [PMID: 36587292 DOI: 10.1007/978-3-031-10457-2_1] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
This book describes a unique class of secondary metabolites, the mono- and dimeric naphthylisoquinoline alkaloids. They occur in lianas of the paleotropical Ancistrocladaceae and Dioncophyllaceae families, exclusively. Their unprecedented structures include stereogenic centers and rotationally hindered, and thus likewise stereogenic, axes. Extended recent investigations on six Ancistrocladus species from Asia, as reported in this review, shed light on their fascinating phytochemical productivity, with over 100 such intriguing natural products. This high chemodiversity arises from a likewise unique biosynthesis from acetate-malonate units, following a novel polyketidic pathway to plant-derived isoquinoline alkaloids. Some of the compounds show most promising antiparasitic activities. Likewise presented are strategies for the regio- and stereoselective total synthesis of the alkaloids, including the directed construction of the chiral axis.
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Affiliation(s)
- Doris Feineis
- Institute of Organic Chemistry, University of Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Gerhard Bringmann
- Institute of Organic Chemistry, University of Würzburg, Am Hubland, 97074, Würzburg, Germany.
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9
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Hu ZX, Zhang P, Zou JB, An Q, Yi P, Yuan CM, Yang J, Gu W, Huang LJ, Zhao LH, Hao XJ. Maillard Reaction Products with Anti-Tobacco Mosaic Virus Activities Generated in Processed Thermopsis lanceolata R. Br. Seed Extract. J Org Chem 2022; 87:11309-11318. [PMID: 35981284 DOI: 10.1021/acs.joc.2c00517] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Six novel Maillard reaction products (MRPs) (1-6) were isolated from the processed Thermopsis lanceolata R. Br. seed extract, along with one biogenetically related intermediate (7). Compounds 1-4 possessed three rare dimerization patterns constructed by cytisine, whereas compounds 5 and 6 represented the first example of the addition products of cytisine and 5,6-dihydroxy-4-hexanolide. Their structures were elucidated by comprehensive spectroscopic data analysis and quantum chemistry calculations including GIAO 13C{1H} NMR and ECD calculation, combined with single-crystal X-ray diffraction analysis. Biologically, compound 3 displayed significant anti-tobacco mosaic virus activity compared with the positive control ningnanmycin.
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Affiliation(s)
- Zhan-Xing Hu
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, PR China.,The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550002, PR China
| | - Peng Zhang
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, PR China.,Guizhou University of Traditional Chinese Medicine, Guiyang 550025, PR China
| | - Ji-Bin Zou
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, PR China.,The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550002, PR China
| | - Qiao An
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, PR China.,The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550002, PR China
| | - Ping Yi
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, PR China.,The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550002, PR China
| | - Chun-Mao Yuan
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, PR China.,The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550002, PR China
| | - Jue Yang
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, PR China.,The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550002, PR China
| | - Wei Gu
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, PR China.,The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550002, PR China
| | - Lie-Jun Huang
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, PR China.,The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550002, PR China
| | - Li-Hua Zhao
- The Institute of Biotechnology and Germplasm Resources, Yunnan Academy of Agricultural Sciences, Kunming 650204, PR China
| | - Xiao-Jiang Hao
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, PR China.,The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550002, PR China.,State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Science, Kunming 650201, PR China
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10
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Chang S, Cai M, Xiao T, Chen Y, Zhao W, Yu L, Shao R, Jiang W, Zhang T, Gan M, Si S, Chen M. Prenylemestrins A and B: Two Unexpected Epipolythiodioxopiperazines with a Thioethanothio Bridge from Emericella sp. Isolated by Genomic Analysis. Org Lett 2022; 24:5941-5945. [PMID: 35938920 DOI: 10.1021/acs.orglett.2c02187] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Prenylemestrins A and B (1 and 2, respectively), two unusual epipolythiodioxopiperazines featuring a thioethanothio bridge instead of a polysulfide bridge, were isolated from the fungus Emericella sp. CPCC 400858 guided by genomic analysis. Their structures were determined by extensive spectroscopic data, NMR and ECD calculations, and X-ray diffraction analysis. A plausible biosynthetic pathway for 1 and 2 was proposed on the basis of gene cluster analysis. Prenylemestrins A and B exhibited cytotoxicities against human chronic myelocytic leukemia cell lines K562 and MEG-01.
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Affiliation(s)
- Shanshan Chang
- NHC Key Laboratory for Microbial Drug Bioengineering, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, People's Republic of China
| | - Meilian Cai
- NHC Key Laboratory for Microbial Drug Bioengineering, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, People's Republic of China
| | - Tongmei Xiao
- NHC Key Laboratory for Microbial Drug Bioengineering, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, People's Republic of China
| | - Yuchuan Chen
- NHC Key Laboratory for Microbial Drug Bioengineering, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, People's Republic of China
| | - Wuli Zhao
- NHC Key Laboratory for Microbial Drug Bioengineering, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, People's Republic of China
| | - Liyan Yu
- NHC Key Laboratory for Microbial Drug Bioengineering, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, People's Republic of China
| | - Rongguang Shao
- NHC Key Laboratory for Microbial Drug Bioengineering, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, People's Republic of China
| | - Wei Jiang
- NHC Key Laboratory for Microbial Drug Bioengineering, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, People's Republic of China
| | - Tao Zhang
- NHC Key Laboratory for Microbial Drug Bioengineering, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, People's Republic of China
| | - Maoluo Gan
- NHC Key Laboratory for Microbial Drug Bioengineering, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, People's Republic of China
| | - Shuyi Si
- NHC Key Laboratory for Microbial Drug Bioengineering, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, People's Republic of China
| | - Minghua Chen
- NHC Key Laboratory for Microbial Drug Bioengineering, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, People's Republic of China
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11
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Shimizu N, Shigemitsu H, Kida T, Bach T, Mori T. Visible Light-Induced Regio- and Enantiodifferentiating [2 + 2] Photocycloaddition of 1,4-Naphthoquinones Mediated by Oppositely Coordinating 1,3,2-Oxazaborolidine Chiral Lewis Acid. J Org Chem 2022; 87:8071-8083. [PMID: 35652135 DOI: 10.1021/acs.joc.2c00730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A range of asymmetric photochemical transformations using visible light have recently become considerably attractive. Among the various approaches, chiral Lewis acid association to enones for [2 + 2] and ortho photocycloadditions and oxadi-π-methane rearrangements have shown to be very promising. Naturally, chiral Lewis acid coordination protects one of the prochiral faces of the C═C double bond, which enables an effective enantiodifferentiation in the following bond-forming process(es). Here, we studied regio- and enantiodifferentiating [2 + 2] photocycloaddition reactions of naphthoquinone derivatives mediated by chiral oxazaborolidines. A stereochemical control was quite challenging for the 2-ene-1,4-dione substrate, as a double coordination of Lewis acid essentially cancels out the face selectivity, and a mono-coordination to each carbonyl group leads to an opposite stereochemical outcome. Furthermore, a stepwise coordination in the ground state of Lewis acid in a 1:1 fashion was practically inaccessible. We found that the excited-state decomplexation is a key to accomplish high regio- and enantioselectivities in the photocycloaddition of an ene-dione.
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Affiliation(s)
- Nao Shimizu
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Hajime Shigemitsu
- Integrated Frontier Research for Medical Science Division Institute for OTRI, Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Toshiyuki Kida
- Integrated Frontier Research for Medical Science Division Institute for OTRI, Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Thorsten Bach
- Department Chemie and Catalysis Research Center (CRC), Technische Universität München, Lichtenbergstrasse 4, Garching 85747, Germany
| | - Tadashi Mori
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
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12
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Li C, Xu Y, Fu P, Guo L, Che Y. Neopestolides A-D, Diphenyl Ether Derivatives from the Plant Endophytic Fungus Neopestalotiopsis sp. JOURNAL OF NATURAL PRODUCTS 2022; 85:607-613. [PMID: 35049297 DOI: 10.1021/acs.jnatprod.1c01031] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Four new diphenyl ether derivatives, neopestolides A-D (2-5), were isolated from cultures of the plant endophytic fungus Neopestalotiopsis sp., along with the known metabolite pestalotiollide A (1); their structures were elucidated primarily by NMR experiments. The absolute configurations of 2 and 3-5 were deduced by electronic circular dichroism calculations and via Snatzke's method, respectively. Compounds 2-4 incorporate tetrahydrofuran moieties attached to the dibenzo[b,g][1,5]dioxocin-5(7H)-one skeleton via C-C linkages. Compounds 1 and 2 showed modest cytotoxicity against HepG2 cells.
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Affiliation(s)
- Chuan Li
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, People's Republic of China
| | - Yang Xu
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, People's Republic of China
| | - Peinan Fu
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, People's Republic of China
| | - Liangdong Guo
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, People's Republic of China
| | - Yongsheng Che
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, People's Republic of China
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13
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Zhang P, An Q, Yi P, Cui Y, Zou JB, Yuan CM, Zhang Y, Gu W, Huang LJ, Zhao LH, Hu ZX, Hao XJ. Thermlanseedlines A-G, seven thermopsine-based alkaloids with antiviral and insecticidal activities from the seeds of Thermopsis lanceolata R. Br. Fitoterapia 2022; 158:105140. [PMID: 35122885 DOI: 10.1016/j.fitote.2022.105140] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 01/25/2022] [Accepted: 01/27/2022] [Indexed: 11/17/2022]
Abstract
Seven undescribed thermopsine-based alkaloids (1-7), including one undescribed biogenetically related intermediate (7), were isolated from the seeds of Thermopsis lanceolata R. Br. Compound 1 possessed a 6/6-6 tricyclic skeleton, while compounds 2-6 represented three rare dimerization patterns constructed by quinolizidine alkaloids. Their structures were elucidated by comprehensive spectroscopic data analysis as well as ECD calculations. Biologically, compound 6 displayed significant anti-Tomato spotted wilt virus (TSWV) activity compared with the positive control ningnanmycin. Moreover, compound 1 exhibited good insecticidal activity against Aphis fabae with LC50 value of 25.2 mg/L.
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Affiliation(s)
- Peng Zhang
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, PR China; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550002, PR China; School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China
| | - Qiao An
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, PR China; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550002, PR China
| | - Ping Yi
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, PR China; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550002, PR China
| | - Yue Cui
- The Institute of Biotechnology and Germplasm Resources, Yunnan Academy of Agricultural Sciences, Kunming 650204, PR China
| | - Ji-Bin Zou
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, PR China; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550002, PR China
| | - Chun-Mao Yuan
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, PR China; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550002, PR China
| | - Yu Zhang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Science, Kunming 650201, PR China
| | - Wei Gu
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, PR China; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550002, PR China
| | - Lie-Jun Huang
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, PR China; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550002, PR China
| | - Li-Hua Zhao
- The Institute of Biotechnology and Germplasm Resources, Yunnan Academy of Agricultural Sciences, Kunming 650204, PR China.
| | - Zhan-Xing Hu
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, PR China; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550002, PR China.
| | - Xiao-Jiang Hao
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, PR China; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550002, PR China; State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Science, Kunming 650201, PR China.
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14
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Wang D, Li P, Yan JL, Mao H, Liu L, Wang M, Chen M, Ye T, Chen Y. Assigning the stereochemical structures of aurantinin A and B with the assistance of biosynthetic investigations. Org Chem Front 2022. [DOI: 10.1039/d2qo01251k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The stereochemistry of aurantinin was determined by spectroscopic and computational analysis with the assistance of biosynthetic studies. The latter method provided critical evidence for the assignment of the configuration of the 3-ketosugar moiety.
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Affiliation(s)
- Dacheng Wang
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Pengwei Li
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Jia-Lei Yan
- Innovation Center of Marine Biotechnology and Pharmaceuticals, School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, Guangdong, China
| | - Huijin Mao
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Lilu Liu
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Min Wang
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
- Innovation Center of Marine Biotechnology and Pharmaceuticals, School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, Guangdong, China
| | - Meng Chen
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Tao Ye
- Innovation Center of Marine Biotechnology and Pharmaceuticals, School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, Guangdong, China
- State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Xili, Nanshan District, Shenzhen 518055, China
| | - Yihua Chen
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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15
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Tajuddeen N, Bringmann G. N, C-Coupled naphthylisoquinoline alkaloids: a versatile new class of axially chiral natural products. Nat Prod Rep 2021; 38:2154-2186. [PMID: 34212956 DOI: 10.1039/d1np00020a] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Covering: up to April 2021During the past decades, a plethora of natural products with restricted rotation about a biaryl axis have been discovered, among them the naphthylisoquinoline (NIQ) alkaloids, mostly C,C-coupled and having remarkable bioactivities. Within this fascinating class of naturally occurring biaryl compounds, NIQ alkaloids bearing an N,C-heterobiaryl axis have attracted particular attention. They are structurally and biosynthetically unprecedented, with interesting stereochemical implications and biological activities. In contrast to existing articles and reviews about axially chiral - yet C,C-coupled - natural products, this is the first, comprehensive review on the new subclass of N,C-coupled NIQs, their isolation and structural elucidation, their N,C-axial chirality, their biosynthetic origin, their promising antiparasitic and antileukemic activities, and their total synthesis.
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Affiliation(s)
- Nasir Tajuddeen
- Department of Chemistry, Ahmadu Bello University, Zaria, Nigeria
| | - Gerhard Bringmann
- Institute of Organic Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany.
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16
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Liu Q, Wang Z, He J, Liu Z. Psidguajones A and B, a pair of complex meroterpenoid epimers from the leaves of Psidium guajava. Org Biomol Chem 2021; 19:5539-5543. [PMID: 34105588 DOI: 10.1039/d1ob00693b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/25/2024]
Abstract
Psidguajones A and B, a pair of dimeric sesquiterpene-based meroterpenoid epimers, have been isolated from the leaves of Psidium guajava for the first time. Their structures were confirmed by comprehensive spectroscopic techniques combined with a comparison of experimental and calculated ECD data.
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Affiliation(s)
- Qing Liu
- College of Chemical Engineering, Huaqiao University, Xiamen 361021, China.
| | - Zhichao Wang
- College of Chemical Engineering, Northwest Minzu University, Lanzhou 730030, China.
| | - Jianming He
- School of Pharmacy, Fudan University, Shanghai 201203, China.
| | - Zhenling Liu
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China.
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17
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Mattison A, Brown JM, Carmichael D, Alcock NW. Are stable atropisomers possible for meta-meta’ linked biphenols. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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18
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Pearce KC, Fuentes RG, Calderon S, Marolikar R, Kingston DGI, Crawford TD. Structure Elucidation and Confirmation of Phloroglucinols from the Roots of Garcinia dauphinensis by Comparison of Experimental and Calculated ECD Spectra and Specific Rotations. JOURNAL OF NATURAL PRODUCTS 2021; 84:1163-1174. [PMID: 33823109 DOI: 10.1021/acs.jnatprod.0c01208] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Eight phloroglucinols from Garcinia dauphinensis were recently reported to have good to moderate antiplasmodial and anticancer activities, consistent with other phloroglucinol derivatives isolated from natural sources. Chiroptical properties were previously calculated and compared to experimental data for compound 2 as a means to deduce its absolute configuration. Tentative assignments for the remaining compounds were also reported based on these data. In order to arrive at stereochemical assignments for phloroglucinols 1 and 3-8, ECD spectra and specific rotations were computed for all stereoisomers of each compound. Molecular orbital analyses were also carried out for the most energetically favorable conformers of each compound. Absolute configurations are reported for all eight phloroglucinols for the first time.
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Affiliation(s)
- Kirk C Pearce
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Rolly G Fuentes
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
- Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, United States
- Division of Natural Sciences and Mathematics, University of the Philippines Visayas Tacloban College, 6500 Tacloban City, Philippines
| | - Susana Calderon
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Rageshwari Marolikar
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - David G I Kingston
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
- Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - T Daniel Crawford
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
- Molecular Sciences Software Institute, 1880 Pratt Drive, Suite 1100, Blacksburg, Virginia 24060, United States
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19
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Umezawa T, Mizutani N, Matsuo K, Tokunaga Y, Matsuda F, Nehira T. Assignment of Absolute Configuration of Bromoallenes by Vacuum-Ultraviolet Circular Dichroism (VUVCD). Molecules 2021; 26:molecules26051296. [PMID: 33673650 PMCID: PMC7957760 DOI: 10.3390/molecules26051296] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Revised: 02/22/2021] [Accepted: 02/22/2021] [Indexed: 12/03/2022] Open
Abstract
A new application of vacuum-ultraviolet circular dichroism (VUVCD), which enables the measurement of CD spectra in the vacuum-ultraviolet region (140–200 nm), for the assignment of the absolute configurations of bromoallenes is described. Bromoallene moieties are found in natural products obtained from many marine organisms. To date, the absolute configuration of bromoallenes has been assigned almost exclusively with Lowe’s rule, which is based on specific rotation. However, exceptions to Lowe’s rule have been reported arising from the presence of other substituents with large specific rotations. For the unambiguous assignment of the absolute configuration of the bromoallene moiety with its characteristic absorption wavelength at 180–190 nm due to the π–π* transition, VUVCD was applied to four pairs of bromoallene diastereomers prepared by modifying the synthetic scheme of omaezallene. The VUVCD spectra clearly showed positive or negative Cotton effects around 180–190 nm according to the configuration of the bromoallene employed, revealing the potential of VUVCD for determining absolute stereochemistry.
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Affiliation(s)
- Taiki Umezawa
- Division of Environmental Materials Science, Graduate School of Environmental Science, Hokkaido University, N10W5, Kita-ku, Sapporo 060-0810, Japan; (N.M.); (F.M.)
- Correspondence: (T.U.); (T.N.)
| | - Nakaba Mizutani
- Division of Environmental Materials Science, Graduate School of Environmental Science, Hokkaido University, N10W5, Kita-ku, Sapporo 060-0810, Japan; (N.M.); (F.M.)
| | - Koichi Matsuo
- Hiroshima Synchrotron Radiation Center (HiSOR), Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima 739-0046, Japan;
| | - Yuugo Tokunaga
- Faculty of Integrated Arts and Sciences, Hiroshima University, 1-7-1 Kagamiyama, Higashi-Hiroshima 739-8521, Japan;
| | - Fuyuhiko Matsuda
- Division of Environmental Materials Science, Graduate School of Environmental Science, Hokkaido University, N10W5, Kita-ku, Sapporo 060-0810, Japan; (N.M.); (F.M.)
| | - Tatsuo Nehira
- Faculty of Integrated Arts and Sciences, Hiroshima University, 1-7-1 Kagamiyama, Higashi-Hiroshima 739-8521, Japan;
- Graduate School of Integrated Sciences for Life, Hiroshima University, 1-7-1 Kagamiyama, Higashi-Hiroshima 739-8521, Japan
- Correspondence: (T.U.); (T.N.)
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20
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Chen H, Kong JB, Zhang L, Wang HH, Cao YG, Zeng MN, Li M, Sun YJ, Du K, Xue GM, Wu Y, Zheng XK, Feng WS. Lycibarbarines A-C, Three Tetrahydroquinoline Alkaloids Possessing a Spiro-Heterocycle Moiety from the Fruits of Lycium barbarum. Org Lett 2021; 23:858-862. [PMID: 33481613 DOI: 10.1021/acs.orglett.0c04092] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Three tetrahydroquinoline alkaloids, lycibarbarines A-C (1-3), possessing a unique tetracyclic tetrahydroquinoline-oxazine-ketohexoside fused motif, were isolated from the fruits of Lycium barbarum. Their structures were determined by spectroscopic analysis and quantum-chemical calculations. Compounds 1 and 3 exhibited neuroprotective activity when evaluated for corticosterone-induced injury by reducing the apoptosis of PC12 cells through the inhibition of caspase-3 and caspase-9.
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Affiliation(s)
- Hui Chen
- School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, P. R. China.,Co-Construction Collaborative Innovation Center for Chinese Medicine and Respiratory Diseases by Henan & Education Ministry of P. R. China, Zhengzhou 450046, P. R. China
| | - Jiang-Bo Kong
- School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, P. R. China
| | - Li Zhang
- School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, P. R. China
| | - Hui-Hui Wang
- School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, P. R. China
| | - Yan-Gang Cao
- School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, P. R. China
| | - Meng-Nan Zeng
- School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, P. R. China
| | - Meng Li
- School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, P. R. China
| | - Yan-Jun Sun
- School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, P. R. China.,Co-Construction Collaborative Innovation Center for Chinese Medicine and Respiratory Diseases by Henan & Education Ministry of P. R. China, Zhengzhou 450046, P. R. China
| | - Kun Du
- School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, P. R. China
| | - Gui-Min Xue
- School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, P. R. China
| | - Ya Wu
- School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, P. R. China
| | - Xiao-Ke Zheng
- School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, P. R. China.,Co-Construction Collaborative Innovation Center for Chinese Medicine and Respiratory Diseases by Henan & Education Ministry of P. R. China, Zhengzhou 450046, P. R. China
| | - Wei-Sheng Feng
- School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, P. R. China.,Co-Construction Collaborative Innovation Center for Chinese Medicine and Respiratory Diseases by Henan & Education Ministry of P. R. China, Zhengzhou 450046, P. R. China
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21
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Sagara T, Sugimoto S, Yamano Y, Nehira T, Masuda K, Otsuka H, Matsunami K. Isolation of Three New Diterpenes from Dodonaea viscosa. Chem Pharm Bull (Tokyo) 2021; 69:40-47. [PMID: 33390520 DOI: 10.1248/cpb.c20-00327] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
An investigation into the methanol extracts obtained from the stems of Dodonaea viscosa led to the isolation of one nor-clerodane diterpene (1) and two labdane diterpenes (2, 3), as well as 17 known compounds (4-20). The structures of these compounds were elucidated based on chemical and spectral evidence. The stereochemical structure of the nor-clerodane diterpene was confirmed via its circular dichroism spectrum and calculated electronic circular dichroism spectrum. Isolated compounds were evaluated for their inhibitory effects on collagenase and tyrosinase. Since 5,7,4'-trihydroxy-3'-(4-hydroxy-3-methylbutyl)-5'-(3-methylbut-2-enyl)-3,6-dimethoxyflavone (9) showed collagenase inhibitory activity and scopoletin (12) had significant tyrosinase inhibitory activity, they were considered to be good candidates for cosmetic agents.
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Affiliation(s)
- Toshinori Sagara
- Department of Pharmacognosy, Graduate School of Biomedical and Health Sciences, Hiroshima University
| | - Sachiko Sugimoto
- Department of Pharmacognosy, Graduate School of Biomedical and Health Sciences, Hiroshima University
| | - Yoshi Yamano
- Department of Pharmacognosy, Graduate School of Biomedical and Health Sciences, Hiroshima University
| | - Tatsuo Nehira
- Graduate School of Integrated Arts and Sciences, Hiroshima University
| | - Kazuma Masuda
- Graduate School of Integrated Arts and Sciences, Hiroshima University
| | - Hideaki Otsuka
- Department of Natural Products Chemistry, Faculty of Pharmacy, Yasuda Women's University
| | - Katsuyoshi Matsunami
- Department of Pharmacognosy, Graduate School of Biomedical and Health Sciences, Hiroshima University
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22
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Zou J, Zhao L, Yi P, An Q, He L, Li Y, Lou H, Yuan C, Gu W, Huang L, Hu Z, Hao X. Quinolizidine Alkaloids with Antiviral and Insecticidal Activities from the Seeds of Sophora tonkinensis Gagnep. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:15015-15026. [PMID: 33285067 DOI: 10.1021/acs.jafc.0c06032] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The discovery of novel, effective, and botanical pesticides is one of the main strategies for modern plant protection and insect pest control. During the search for novel botanical pesticides from natural sources, the seeds of Sophora tonkinensis were systematically investigated to obtain 11 new matrine-type alkaloids (1-11), including one novel matrine-type alkaloid featuring an unprecedented 5/6/6/6 tetracyclic skeleton (1), along with 16 known compounds (12-27). Their structures were elucidated by comprehensive spectroscopic data analysis (IR, UV, NMR, and HRESIMS), ECD calculations, and single-crystal X-ray diffraction. The anti-tobacco mosaic virus (TMV) activity and insecticidal activities against Aphis fabae and Tetranychus urticae of the compounds were also respectively screened using the half-leaf method and spray method. Biological tests indicated that compounds 2, 4, 6, and 26 displayed significant anti-TMV biological activities compared with the positive control ningnanmycin. Compounds 7, 17, and 26 presented moderate activities against A. fabae with LC50 values of 38.29, 18.63, and 23.74 mg/L, respectively. Moreover, compounds 13 and 26 exhibited weak activities against T. urticae.
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Affiliation(s)
- Jibin Zou
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, PR China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550002, PR China
- School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550025, PR China
| | - Lihua Zhao
- The Institute of Biotechnology and Germplasm Resources, Yunnan Academy of Agricultural Sciences, Kunming 650204, PR China
| | - Ping Yi
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, PR China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550002, PR China
| | - Qiao An
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, PR China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550002, PR China
| | - Longxiang He
- School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550025, PR China
| | - Yanan Li
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, PR China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550002, PR China
| | - Huayong Lou
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, PR China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550002, PR China
| | - Chunmao Yuan
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, PR China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550002, PR China
| | - Wei Gu
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, PR China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550002, PR China
| | - Liejun Huang
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, PR China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550002, PR China
| | - Zhanxing Hu
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, PR China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550002, PR China
| | - Xiaojiang Hao
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, PR China
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550002, PR China
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23
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Guo Z, Zou ZM. Discovery of New Secondary Metabolites by Epigenetic Regulation and NMR Comparison from the Plant Endophytic Fungus Monosporascus eutypoides. Molecules 2020; 25:molecules25184192. [PMID: 32932749 PMCID: PMC7570479 DOI: 10.3390/molecules25184192] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 09/09/2020] [Accepted: 09/10/2020] [Indexed: 01/29/2023] Open
Abstract
Overexpression of the histone acetyltransferase and the 1H NMR spectroscopic experiments of the endophytic fungus Monosporascus eutypoides resulted in the isolation of two new compounds, monosporasols A (1) and B (2), and two known compounds, pestaloficin C (3) and arthrinone (4). Their planar structures and absolute configurations were determined by spectroscopic analysis including high resolution electrospray ionization mass spectroscopy (HRESIMS), one-dimensional (1D) and two-dimensional (2D) NMR, and calculated electronic circular dichroism data. Compounds 1–2 were screened in cytotoxic bioassays against HeLa, HCT-8, A549 and MCF-7 cells. Our work highlights the enormous potential of epigenetic manipulation along with the NMR comparison as an effective strategy for unlocking the chemical diversity encoded by fungal genomes.
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24
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Krupp F, Frey W, Richert C. Absolute Configuration of Small Molecules by Co-Crystallization. Angew Chem Int Ed Engl 2020; 59:15875-15879. [PMID: 32441841 PMCID: PMC7540501 DOI: 10.1002/anie.202004992] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Indexed: 12/18/2022]
Abstract
The most reliable method to determine the absolute configuration of chiral molecules is X-ray crystallography, but small molecules can be difficult to crystallize. We report rapid co-crystallization of tetraaryladamantanes with small molecules as different as n-decane to nicotine to produce crystals for X-ray analysis and the assignment of absolute configuration when the molecules are chiral. A screen of 52 diverse compounds gave inclusion in co-crystals for 88 % of all cases and a high-resolution structure in 77 % of cases. Furthermore, starting from three milligrams of analyte, a combination of NMR spectroscopy and X-ray crystallography produced a full structure in less than three days using an adamantane crystallization chaperone that encapsulates the analyte at room temperature.
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Affiliation(s)
- Felix Krupp
- Institute of Organic ChemistryUniversity of Stuttgart70569StuttgartGermany
| | - Wolfgang Frey
- Institute of Organic ChemistryUniversity of Stuttgart70569StuttgartGermany
| | - Clemens Richert
- Institute of Organic ChemistryUniversity of Stuttgart70569StuttgartGermany
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25
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Saito F, Schreiner PR. Determination of the Absolute Configurations of Chiral Alkanes – An Analysis of the Available Tools. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000711] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Fumito Saito
- Institute of Organic Chemistry Justus Liebig University Heinrich‐Buff‐Ring 17 35392 Giessen Germany
| | - Peter R. Schreiner
- Institute of Organic Chemistry Justus Liebig University Heinrich‐Buff‐Ring 17 35392 Giessen Germany
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26
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Krupp F, Frey W, Richert C. Absolute Configuration of Small Molecules by Co‐Crystallization. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202004992] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Felix Krupp
- Institute of Organic Chemistry University of Stuttgart 70569 Stuttgart Germany
| | - Wolfgang Frey
- Institute of Organic Chemistry University of Stuttgart 70569 Stuttgart Germany
| | - Clemens Richert
- Institute of Organic Chemistry University of Stuttgart 70569 Stuttgart Germany
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27
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Wu Q, Li SW, Xu H, Wang H, Hu P, Zhang H, Luo C, Chen KX, Nay B, Guo YW, Li XW. Complex Polypropionates from a South China Sea Photosynthetic Mollusk: Isolation and Biomimetic Synthesis Highlighting Novel Rearrangements. Angew Chem Int Ed Engl 2020; 59:12105-12112. [PMID: 32277730 DOI: 10.1002/anie.202003643] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Indexed: 11/09/2022]
Abstract
Placobranchus ocellatus is well known to produce diverse and complex γ-pyrone polypropionates. In this study, the chemical investigation of P. ocellatus from the South China Sea led to the discovery and identification of ocellatusones A-D, a series of racemic non-γ-pyrone polyketides with novel skeletons, characterized by a bicyclo[3.2.1]octane (1, 2), a bicyclo[3.3.1]nonane (3) or a mesitylene-substituted dimethylfuran-3(2H)-one core (4). Extensive spectroscopic analysis, quantum chemical computation, chemical synthesis, and/or X-ray diffraction analysis were used to determine the structure and absolute configuration of the new compounds, including each enantiomer of racemic compounds 1-4 after chiral HPLC resolution. An array of new and diversity-generating rearrangements is proposed to explain the biosynthesis of these unusual compounds based on careful structural analysis and comparison with six known co-occurring γ-pyrones (5-10). Furthermore, the successful biomimetic semisynthesis of ocellatusone A (1) confirmed the proposed rearrangement through an unprecedented acid induced cascade reaction.
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Affiliation(s)
- Qihao Wu
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai, 201203, China.,College of Pharmaceutical Science and Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Song-Wei Li
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai, 201203, China.,Nanjing University of Chinese Medicine, 138 Xianlin Road, Nanjing, 210023, China
| | - Heng Xu
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai, 201203, China
| | - Hong Wang
- College of Pharmaceutical Science and Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Pei Hu
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai, 201203, China
| | - Hao Zhang
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai, 201203, China
| | - Cheng Luo
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai, 201203, China.,Open Studio for Druggability Research of Marine Natural Products, Pilot National Laboratory for Marine Science and Technology, 1 Wenhai Road, Aoshanwei, Jimo, Qingdao, 266237, China
| | - Kai-Xian Chen
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai, 201203, China.,Open Studio for Druggability Research of Marine Natural Products, Pilot National Laboratory for Marine Science and Technology, 1 Wenhai Road, Aoshanwei, Jimo, Qingdao, 266237, China
| | - Bastien Nay
- Laboratoire de Synthèse Organique, Ecole Polytechnique, ENSTA, CNRS, Institut Polytechnique de Paris, 91128, Palaiseau Cedex, France
| | - Yue-Wei Guo
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai, 201203, China.,Open Studio for Druggability Research of Marine Natural Products, Pilot National Laboratory for Marine Science and Technology, 1 Wenhai Road, Aoshanwei, Jimo, Qingdao, 266237, China
| | - Xu-Wen Li
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai, 201203, China.,Open Studio for Druggability Research of Marine Natural Products, Pilot National Laboratory for Marine Science and Technology, 1 Wenhai Road, Aoshanwei, Jimo, Qingdao, 266237, China
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28
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Wu Q, Li S, Xu H, Wang H, Hu P, Zhang H, Luo C, Chen K, Nay B, Guo Y, Li X. Complex Polypropionates from a South China Sea Photosynthetic Mollusk: Isolation and Biomimetic Synthesis Highlighting Novel Rearrangements. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202003643] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Qihao Wu
- State Key Laboratory of Drug Research Shanghai Institute of Materia Medica Chinese Academy of Sciences 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park Shanghai 201203 China
- College of Pharmaceutical Science and Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals Zhejiang University of Technology Hangzhou 310014 China
| | - Song‐Wei Li
- State Key Laboratory of Drug Research Shanghai Institute of Materia Medica Chinese Academy of Sciences 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park Shanghai 201203 China
- Nanjing University of Chinese Medicine 138 Xianlin Road Nanjing 210023 China
| | - Heng Xu
- State Key Laboratory of Drug Research Shanghai Institute of Materia Medica Chinese Academy of Sciences 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park Shanghai 201203 China
| | - Hong Wang
- College of Pharmaceutical Science and Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals Zhejiang University of Technology Hangzhou 310014 China
| | - Pei Hu
- State Key Laboratory of Drug Research Shanghai Institute of Materia Medica Chinese Academy of Sciences 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park Shanghai 201203 China
| | - Hao Zhang
- State Key Laboratory of Drug Research Shanghai Institute of Materia Medica Chinese Academy of Sciences 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park Shanghai 201203 China
| | - Cheng Luo
- State Key Laboratory of Drug Research Shanghai Institute of Materia Medica Chinese Academy of Sciences 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park Shanghai 201203 China
- Open Studio for Druggability Research of Marine Natural Products Pilot National Laboratory for Marine Science and Technology 1 Wenhai Road, Aoshanwei, Jimo Qingdao 266237 China
| | - Kai‐Xian Chen
- State Key Laboratory of Drug Research Shanghai Institute of Materia Medica Chinese Academy of Sciences 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park Shanghai 201203 China
- Open Studio for Druggability Research of Marine Natural Products Pilot National Laboratory for Marine Science and Technology 1 Wenhai Road, Aoshanwei, Jimo Qingdao 266237 China
| | - Bastien Nay
- Laboratoire de Synthèse Organique Ecole Polytechnique, ENSTA CNRS, Institut Polytechnique de Paris 91128 Palaiseau Cedex France
| | - Yue‐Wei Guo
- State Key Laboratory of Drug Research Shanghai Institute of Materia Medica Chinese Academy of Sciences 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park Shanghai 201203 China
- Open Studio for Druggability Research of Marine Natural Products Pilot National Laboratory for Marine Science and Technology 1 Wenhai Road, Aoshanwei, Jimo Qingdao 266237 China
| | - Xu‐Wen Li
- State Key Laboratory of Drug Research Shanghai Institute of Materia Medica Chinese Academy of Sciences 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park Shanghai 201203 China
- Open Studio for Druggability Research of Marine Natural Products Pilot National Laboratory for Marine Science and Technology 1 Wenhai Road, Aoshanwei, Jimo Qingdao 266237 China
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29
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Santoro E, Vergura S, Scafato P, Belviso S, Masi M, Evidente A, Superchi S. Absolute Configuration Assignment to Chiral Natural Products by Biphenyl Chiroptical Probes: The Case of the Phytotoxins Colletochlorin A and Agropyrenol. JOURNAL OF NATURAL PRODUCTS 2020; 83:1061-1068. [PMID: 32091903 PMCID: PMC7997626 DOI: 10.1021/acs.jnatprod.9b01068] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
The application of flexible biphenyls as chiroptical probes for the absolute configuration assignment to chiral natural products is described. The method is straightforward and reliable and can be applied to conformationally mobile and ECD silent compounds, not treatable by computational analysis of chiroptical data. By this approach, the (6'R) absolute configuration of the phytotoxin colletochlorin A (1) was confirmed, while the absolute configuration of the phytotoxin agropyrenol (2), previously assigned by the NMR Mosher method, was revised and assigned as (3'S,4'S). Moreover, with the biphenyl method the configurational assignment can be obtained simply by the sign of a diagnostic Cotton effect at 250 nm in the ECD spectrum, thus allowing application without the need of advanced knowledge of chiroptical spectroscopy and computational protocols.
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Affiliation(s)
- Ernesto Santoro
- Department
of Sciences, University of Basilicata, Viale dell’Ateneo Lucano
10, 85100 Potenza, Italy
| | - Stefania Vergura
- Department
of Sciences, University of Basilicata, Viale dell’Ateneo Lucano
10, 85100 Potenza, Italy
| | - Patrizia Scafato
- Department
of Sciences, University of Basilicata, Viale dell’Ateneo Lucano
10, 85100 Potenza, Italy
| | - Sandra Belviso
- Department
of Sciences, University of Basilicata, Viale dell’Ateneo Lucano
10, 85100 Potenza, Italy
| | - Marco Masi
- Department
of Chemical Sciences, University of Naples
Federico II, Complesso Universitario Monte San’Angelo, Via Cintia 4, 80126 Napoli, Italy
| | - Antonio Evidente
- Department
of Chemical Sciences, University of Naples
Federico II, Complesso Universitario Monte San’Angelo, Via Cintia 4, 80126 Napoli, Italy
| | - Stefano Superchi
- Department
of Sciences, University of Basilicata, Viale dell’Ateneo Lucano
10, 85100 Potenza, Italy
- Tel: +39-0971-20-6098. Fax: +39-0971-20-5678.
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30
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Matsumoto K, Miki K, Tanaka R, Matsuda T, Nehira T, Hirao Y, Kurata H, Pescitelli G, Kubo T. Chiral Tetraarylmethane Derivative with Metal‐Coordinating Ability. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.201900760] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Kouzou Matsumoto
- Institute of Natural SciencesSenshu University 2-1-1 Higashimita Kawasaki, Kanagawa 214-8580 Japan
| | - Kaori Miki
- Department of Chemistry Graduate School of ScienceOsaka University 1-1 Machikaneyamacho Toyonaka, Osaka 560-0043 Japan
| | - Rina Tanaka
- Department of Chemistry Graduate School of ScienceOsaka University 1-1 Machikaneyamacho Toyonaka, Osaka 560-0043 Japan
| | - Takahiro Matsuda
- Faculty of Integrated Arts and SciencesHiroshima University 1-7-1 Kagamiyama Higashi-hiroshima 739-8521 Japan
| | - Tatsuo Nehira
- Graduate School of Integrated Sciences for LifeHiroshima University 1-7-1 Kagamiyama Higashi-hiroshima 739-8521 Japan
| | - Yasukazu Hirao
- Department of Chemistry Graduate School of ScienceOsaka University 1-1 Machikaneyamacho Toyonaka, Osaka 560-0043 Japan
| | - Hiroyuki Kurata
- Organization for Fundamental EducationFukui University of Technology 3-6-1 Gakuen Fukui 910-8505 Japan
| | - Gennaro Pescitelli
- Department of Chemistry, via Moruzzi 13University of Pisa 56124 Pisa Italy
| | - Takashi Kubo
- Department of Chemistry Graduate School of ScienceOsaka University 1-1 Machikaneyamacho Toyonaka, Osaka 560-0043 Japan
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31
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Padula D, Mazzeo G, Santoro E, Scafato P, Belviso S, Superchi S. Amplification of the chiroptical response of UV-transparent amines and alcohols by N-phthalimide derivatization enabling absolute configuration determination through ECD computational analysis. Org Biomol Chem 2020; 18:2094-2102. [PMID: 32107518 DOI: 10.1039/d0ob00052c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The stereoselective transformation of chiral UV-transparent amines and alcohols to phthalimides has proved to be a simple and efficient method to enhance the chiroptical response of these substrates allowing their reliable absolute configuration determination by computational analysis of ECD spectra. Such a transformation also leads to a significant reduction in the molecular conformational flexibility thus simplifying the conformational analysis required by the computational treatment. The method described herein thus allows the absolute configuration assignment to these challenging substrates to be much easier and reliable.
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Affiliation(s)
- Daniele Padula
- Dipartimento di Scienze, Università della Basilicata, via dell'Ateneo Lucano, 85100, Potenza, Italy.
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32
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Bae M, An JS, Hong SH, Bae ES, Chung B, Kwon Y, Hong S, Oh KB, Shin J, Lee SK, Oh DC. Donghaecyclinones A-C: New Cytotoxic Rearranged Angucyclinones from a Volcanic Island-Derived Marine Streptomyces sp. Mar Drugs 2020; 18:md18020121. [PMID: 32085561 PMCID: PMC7073551 DOI: 10.3390/md18020121] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Revised: 02/08/2020] [Accepted: 02/10/2020] [Indexed: 12/14/2022] Open
Abstract
Chemical profiling of the Streptomyces sp. strain SUD119, which was isolated from a marine sediment sample collected from a volcanic island in Korea, led to the discovery of three new metabolites: donghaecyclinones A–C (1–3). The structures of 1–3 were found to be rearranged, multicyclic, angucyclinone-class compounds according to nuclear magnetic resonance (NMR) and mass spectrometry (MS) analyses. The configurations of their stereogenic centers were successfully assigned using a combination of quantum mechanics–based computational methods for calculating the NMR shielding tensor (DP4 and CP3) as well as electronic circular dichroism (ECD) along with a modified version of Mosher’s method. Donghaecyclinones A–C (1–3) displayed cytotoxicity against diverse human cancer cell lines (IC50: 6.7–9.6 μM for 3).
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Affiliation(s)
- Munhyung Bae
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Korea; (M.B.); (J.S.A.); (S.-H.H.); (E.S.B.); (Y.K.); (J.S.); (S.K.L.)
| | - Joon Soo An
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Korea; (M.B.); (J.S.A.); (S.-H.H.); (E.S.B.); (Y.K.); (J.S.); (S.K.L.)
| | - Seong-Heon Hong
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Korea; (M.B.); (J.S.A.); (S.-H.H.); (E.S.B.); (Y.K.); (J.S.); (S.K.L.)
| | - Eun Seo Bae
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Korea; (M.B.); (J.S.A.); (S.-H.H.); (E.S.B.); (Y.K.); (J.S.); (S.K.L.)
| | - Beomkoo Chung
- Department of Agricultural Biotechnology, College of Agriculture & Life Sciences, Seoul National University, Seoul 08826, Korea; (B.C.); (K.-B.O.)
| | - Yun Kwon
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Korea; (M.B.); (J.S.A.); (S.-H.H.); (E.S.B.); (Y.K.); (J.S.); (S.K.L.)
| | - Suckchang Hong
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Korea;
| | - Ki-Bong Oh
- Department of Agricultural Biotechnology, College of Agriculture & Life Sciences, Seoul National University, Seoul 08826, Korea; (B.C.); (K.-B.O.)
| | - Jongheon Shin
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Korea; (M.B.); (J.S.A.); (S.-H.H.); (E.S.B.); (Y.K.); (J.S.); (S.K.L.)
| | - Sang Kook Lee
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Korea; (M.B.); (J.S.A.); (S.-H.H.); (E.S.B.); (Y.K.); (J.S.); (S.K.L.)
| | - Dong-Chan Oh
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Korea; (M.B.); (J.S.A.); (S.-H.H.); (E.S.B.); (Y.K.); (J.S.); (S.K.L.)
- Correspondence: ; Tel.: +82-2880-2491
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33
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Saepua S, Kornsakulkarn J, Auncharoen P, Rachtawee P, Kongthong S, Boonyuen N, Harding DJ, Nehira T, Thongpanchang T, Thongpanchang C. Secondary metabolites from cultures of the ant pathogenic fungus Ophiocordyceps irangiensis BCC 2728. Nat Prod Res 2020; 35:3556-3561. [PMID: 31933382 DOI: 10.1080/14786419.2020.1713119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Five new compounds, iranginins A-E (1-5), together with sixteen known compounds were isolated from the insect pathogenic fungus Ophiocordyceps irangiensis BCC 2728. The structures and the absolute configurations of the new compounds were established by spectroscopic analyses, the application of modified Mosher's method (for 2), ECD calculation (for 5), and X-ray crystallographic analysis (for 4). LL-Z1640-5 and mucorisocoumarin C were active against Mycobacterium tuberculosis (MIC 41.7 and 85.0 µM, respectively), while peyroisocoumarin D exhibited cytotoxic activity (IC50 65.6 µM).
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Affiliation(s)
- Siriporn Saepua
- National Center for Genetic Engineering and Biotechnology (BIOTEC), Pathumthani, Thailand
| | - Jittra Kornsakulkarn
- National Center for Genetic Engineering and Biotechnology (BIOTEC), Pathumthani, Thailand
| | - Patchanee Auncharoen
- National Center for Genetic Engineering and Biotechnology (BIOTEC), Pathumthani, Thailand
| | - Pranee Rachtawee
- National Center for Genetic Engineering and Biotechnology (BIOTEC), Pathumthani, Thailand
| | - Surisa Kongthong
- National Center for Genetic Engineering and Biotechnology (BIOTEC), Pathumthani, Thailand
| | - Nattawut Boonyuen
- National Center for Genetic Engineering and Biotechnology (BIOTEC), Pathumthani, Thailand
| | - David J Harding
- Functional Materials and Nanotechnology Center of Excellence, Walailak University, Nakhon Si Thammarat, Thailand
| | - Tatsuo Nehira
- Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Japan
| | - Tienthong Thongpanchang
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Chawanee Thongpanchang
- National Center for Genetic Engineering and Biotechnology (BIOTEC), Pathumthani, Thailand
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Li HT, Liu T, Yang R, Xie F, Yang Z, Yang Y, Zhou H, Ding ZT. Phomretones A–F, C12 polyketides from the co-cultivation of Phoma sp. YUD17001 and Armillaria sp. RSC Adv 2020; 10:18384-18389. [PMID: 35517188 PMCID: PMC9053967 DOI: 10.1039/d0ra02524k] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Accepted: 05/04/2020] [Indexed: 11/30/2022] Open
Abstract
Six new C12 polyketides, phomretones A–F (1–6), were isolated from the co-culture of Armillaria sp. and the endophytic fungus Phoma sp. YUD17001 associated with Gastrodia elata. Neither fungus produced these compounds when cultured alone. The structures of 1–6 were established on the basis of comprehensive spectroscopic analyses, while their absolute configurations were determined by the comparsion of experimental and calculated ECD spectra. Compounds 2–4 are diastereoisomers of each other and featured high levels of stereoisomerization and oxidation. Co-cultivation of Phoma sp. YUD17001 with Armillaria sp. led to the production of six new C12 polyketides.![]()
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Affiliation(s)
- Hong-Tao Li
- Key Laboratory of Functional Molecules Analysis and Biotransformation of Universities in Yunnan Province
- Key Laboratory of Medicinal Chemistry for Natural Resource
- Ministry of Education
- School of Chemical Science and Technology
- Yunnan University
| | - Tao Liu
- Key Laboratory of Functional Molecules Analysis and Biotransformation of Universities in Yunnan Province
- Key Laboratory of Medicinal Chemistry for Natural Resource
- Ministry of Education
- School of Chemical Science and Technology
- Yunnan University
| | - Ruining Yang
- Key Laboratory of Functional Molecules Analysis and Biotransformation of Universities in Yunnan Province
- Key Laboratory of Medicinal Chemistry for Natural Resource
- Ministry of Education
- School of Chemical Science and Technology
- Yunnan University
| | - Fei Xie
- Key Laboratory of Functional Molecules Analysis and Biotransformation of Universities in Yunnan Province
- Key Laboratory of Medicinal Chemistry for Natural Resource
- Ministry of Education
- School of Chemical Science and Technology
- Yunnan University
| | - Zhi Yang
- Key Laboratory of Functional Molecules Analysis and Biotransformation of Universities in Yunnan Province
- Key Laboratory of Medicinal Chemistry for Natural Resource
- Ministry of Education
- School of Chemical Science and Technology
- Yunnan University
| | - Yabin Yang
- Key Laboratory of Functional Molecules Analysis and Biotransformation of Universities in Yunnan Province
- Key Laboratory of Medicinal Chemistry for Natural Resource
- Ministry of Education
- School of Chemical Science and Technology
- Yunnan University
| | - Hao Zhou
- Key Laboratory of Functional Molecules Analysis and Biotransformation of Universities in Yunnan Province
- Key Laboratory of Medicinal Chemistry for Natural Resource
- Ministry of Education
- School of Chemical Science and Technology
- Yunnan University
| | - Zhong-Tao Ding
- Key Laboratory of Functional Molecules Analysis and Biotransformation of Universities in Yunnan Province
- Key Laboratory of Medicinal Chemistry for Natural Resource
- Ministry of Education
- School of Chemical Science and Technology
- Yunnan University
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35
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Cytotoxic lignans from fruits of Cleistanthus tonkinensis. Fitoterapia 2019; 140:104432. [PMID: 31759030 DOI: 10.1016/j.fitote.2019.104432] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 11/19/2019] [Accepted: 11/19/2019] [Indexed: 11/21/2022]
Abstract
Seven new lignans, cleistonkinins A- E (1-5), cleistonkisides A and B (6-7) were isolated from the fruits of Cleistanthus tonkinensis (Euphorbiaceae), together with five known aryltetralin lignans, cleisindoside B (8), cleistantoxin (9), cleisindoside D (10), neocleistantoxin (11) and polygamain (12). Their structures were established from spectral analysis, including mass spectrometry and 2D-NMR. The absolute configurations of 4-7 were determined by analysis of their experimental CD spectra and comparison with calculated electronic circular dichroism (ECD) spectra. Compounds 2 and 6 had selective inhibition with moderate cytotoxicity against Pan C1 and A549 cell lines, respectively. Cleistantoxin (9) was significantly active against A549, HeLa, Hep3B, Pan C1 and MCF7 cell lines while it was less cytotoxic against HeLa cells. Neocleistantoxin (11) exhibited remarkable inhibition toward A549, HeLa, MCF7 and Pan C1. This is the first report for cytotoxicity of 9 and 11 against A549, Hep3B and Pan C1 cell lines.
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Pecio Ł, Alilou M, Kozachok S, Erdogan Orhan I, Eren G, Senol Deniz FS, Stuppner H, Oleszek W. Yuccalechins A-C from the Yucca schidigera Roezl ex Ortgies Bark: Elucidation of the Relative and Absolute Configurations of Three New Spirobiflavonoids and Their Cholinesterase Inhibitory Activities. Molecules 2019; 24:molecules24224162. [PMID: 31744162 PMCID: PMC6891570 DOI: 10.3390/molecules24224162] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 11/13/2019] [Accepted: 11/14/2019] [Indexed: 12/16/2022] Open
Abstract
The ethyl acetate fraction of the methanolic extract of Yucca schidigera Roezl ex Ortgies bark exhibited moderate acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) inhibitory activity (IC50 47.44 and 47.40 µg mL−1, respectively). Gel filtration on Sephadex LH-20 and further RP-C18 preparative HPLC of EtOAc fraction afforded 15 known and 3 new compounds, stereoisomers of larixinol. The structures of the isolated spirobiflavonoids 15, 26, and 29 were elucidated using 1D and 2D NMR and MS spectroscopic techniques. The relative configuration of isolated compounds was assigned based on coupling constants and ROESY (rotating-frame Overhauser spectroscopy) correlations along with applying the DP4+ probability method in case of ambiguous chiral centers. Determination of absolute configuration was performed by comparing calculated electronic circular dichroism (ECD) spectra with experimental ones. Compounds 26 and 29, obtained in sufficient amounts, were evaluated for activities against AChE and BChE, and they showed a weak inhibition only towards AChE (IC50 294.18 µM for 26, and 655.18 µM for 29). Furthermore, molecular docking simulations were performed to investigate the possible binding modes of 26 and 29 with AChE.
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Affiliation(s)
- Łukasz Pecio
- Department of Biochemistry and Crop Quality, Institute of Soil Science and Plant Cultivation-State Research Institute, Czartoryskich 8, 24-100 Puławy, Poland; (S.K.); (W.O.)
- Correspondence: (Ł.P.); (M.A.); Tel.: +48-814-786-882 (Ł.P.); +43-512-507-58437 (M.A.)
| | - Mostafa Alilou
- Institute of Pharmacy/Pharmacognosy, Center for Molecular Biosciences Innsbruck, University of Innsbruck, Innrain 80/82, Innsbruck 6020, Austria;
- Correspondence: (Ł.P.); (M.A.); Tel.: +48-814-786-882 (Ł.P.); +43-512-507-58437 (M.A.)
| | - Solomiia Kozachok
- Department of Biochemistry and Crop Quality, Institute of Soil Science and Plant Cultivation-State Research Institute, Czartoryskich 8, 24-100 Puławy, Poland; (S.K.); (W.O.)
| | - Ilkay Erdogan Orhan
- Department of Pharmacognosy, Faculty of Pharmacy, Gazi University, 06330 Ankara, Turkey; (I.E.O.); (F.S.S.D.)
| | - Gokcen Eren
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Gazi University, 06330 Ankara, Turkey;
| | - Fatma Sezer Senol Deniz
- Department of Pharmacognosy, Faculty of Pharmacy, Gazi University, 06330 Ankara, Turkey; (I.E.O.); (F.S.S.D.)
| | - Hermann Stuppner
- Institute of Pharmacy/Pharmacognosy, Center for Molecular Biosciences Innsbruck, University of Innsbruck, Innrain 80/82, Innsbruck 6020, Austria;
| | - Wiesław Oleszek
- Department of Biochemistry and Crop Quality, Institute of Soil Science and Plant Cultivation-State Research Institute, Czartoryskich 8, 24-100 Puławy, Poland; (S.K.); (W.O.)
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Gao X, Cheng R, Xiao YL, Wan XL, Zhang X. Copper-Catalyzed Highly Enantioselective Difluoroalkylation of Secondary Propargyl Sulfonates with Difluoroenoxysilanes. Chem 2019. [DOI: 10.1016/j.chempr.2019.09.012] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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38
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Hu ZX, An Q, Tang HY, Chen ZH, Aisa HA, Zhang Y, Hao XJ. Acoapetaludines A-K, C 20 and C 19-diterpenoid alkaloids from the whole plants of Aconitum apetalum (Huth) B.Fedtsch. PHYTOCHEMISTRY 2019; 167:112111. [PMID: 31491684 DOI: 10.1016/j.phytochem.2019.112111] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 06/18/2019] [Accepted: 08/26/2019] [Indexed: 06/10/2023]
Abstract
A C20-diterpenoid alkaloid with an unprecedented carbon skeleton, acoapetaludine A, together with ten undescribed aconitine-type C19-diterpenoid alkaloids, acoapetaludines B-K, were isolated from the whole plants of Aconitum apetalum (Huth) B. Fedtsch. (Ranunculaceae). The structures were elucidated based on a comprehensive spectroscopic data analysis. The absolute configuration of acoapetaludine A was determined by quantum ECD calculation. Acoapetaludines D and E exhibited weak anti-Helicobacter pylori activity at a minimum inhibitory concentration (MIC) of 100 and 50 μg/mL, respectively.
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Affiliation(s)
- Zhan-Xing Hu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, PR China; The Xinjiang Technical Institute of Physics & Chemistry, Chinese Academy of Sciences, Urumqi, 830011, PR China; University of Chinese Academy of Sciences, Yuquan Road 19, Beijing, 100049, PR China; State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang, 550014, PR China; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang, 550002, PR China
| | - Qiao An
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang, 550014, PR China; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang, 550002, PR China
| | - Hong-Yu Tang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, PR China; School of Chemical Science and Technology, Yunnan University, Kunming, 650091, PR China
| | - Zheng-Hong Chen
- School of Basic Medical Sciences, Guizhou Medical University, Guiyang, 550025, PR China
| | - Haji Aker Aisa
- The Xinjiang Technical Institute of Physics & Chemistry, Chinese Academy of Sciences, Urumqi, 830011, PR China
| | - Yu Zhang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, PR China.
| | - Xiao-Jiang Hao
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, PR China; State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang, 550014, PR China; The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang, 550002, PR China.
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Cai YS, Wang C, Tian C, Sun WT, Chen L, Xiao D, Zhou SY, Qiu G, Yu J, Zhu K, Yang SP. Octahydro-Protoberberine and Protoemetine-Type Alkaloids from the Stems of Alangium salviifolium and Their Cytotoxicity. JOURNAL OF NATURAL PRODUCTS 2019; 82:2645-2652. [PMID: 31513408 DOI: 10.1021/acs.jnatprod.9b00670] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Two octahydro-protoberberine alkaloids, alangiifoliumines A (1) and B (2), and two new protoemetine derivatives, alangiifoliumines C (3) and D (4), together with 11 known compounds, have been isolated from the stems of Alangium salviifolium. While the structures of these compounds were elucidated by spectroscopic methods, the absolute configurations of the new alkaloids were determined by conformational analysis and time-dependent density functional theory-electronic circular dichroism spectra calculations on selected stereoisomers. Compounds 1 and 2 represent the first 5,8,8a,9,12,12a,13,13a-octahydro-protoberberine derivatives, in which the aromatic ring D was reduced to cyclohexene. All the compounds isolated were evaluated for their cytotoxic activity against three human cancer cell lines: A-549, HeLa, and SKOV-3. Alkaloids 1, 3, and 6-14 exhibited inhibitory effects against all three human cancer cell lines, with half-maximal inhibitory concentration (IC50) values in the range of 3 nM to 9.4 μM.
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Affiliation(s)
- You-Sheng Cai
- Institute of TCM and Natural Products, School of Pharmaceutical Sciences , Wuhan University , Wuhan 430071 , People's Republic of China
| | - Cong Wang
- Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, Key Laboratory of Guangxi Colleges and Universities for Food Safety and Pharmaceutical Analytical Chemistry, School of Chemistry and Chemical Engineering , Guangxi University for Nationalities , Nanning 530006 , People's Republic of China
| | - Congkui Tian
- Wuling Mountain Institute of Natural Medicine , Hubei Minzu University, Key Laboratory of Biological Resources Protection and Utilization of Hubei Province , Enshi 445000 , People's Republic of China
| | - Wen-Ting Sun
- Institute of TCM and Natural Products, School of Pharmaceutical Sciences , Wuhan University , Wuhan 430071 , People's Republic of China
| | - Ling Chen
- Institute of TCM and Natural Products, School of Pharmaceutical Sciences , Wuhan University , Wuhan 430071 , People's Republic of China
| | - Di Xiao
- Institute of TCM and Natural Products, School of Pharmaceutical Sciences , Wuhan University , Wuhan 430071 , People's Republic of China
| | - Si-Yuan Zhou
- Institute of TCM and Natural Products, School of Pharmaceutical Sciences , Wuhan University , Wuhan 430071 , People's Republic of China
| | - Guofu Qiu
- Institute of TCM and Natural Products, School of Pharmaceutical Sciences , Wuhan University , Wuhan 430071 , People's Republic of China
| | - Jianqing Yu
- Institute of TCM and Natural Products, School of Pharmaceutical Sciences , Wuhan University , Wuhan 430071 , People's Republic of China
| | - Kongkai Zhu
- School of Biological Science and Technology , University of Jinan , Jinan 250022 , People's Republic of China
| | - Sheng-Ping Yang
- Institute of TCM and Natural Products, School of Pharmaceutical Sciences , Wuhan University , Wuhan 430071 , People's Republic of China
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Zhu GL, Wan LS, Peng XR, Shi QQ, Li XN, Chen JC, Zhou L, Qiu MH. Cytotoxic Limonoids from the Twigs and Leaves of Toona ciliata. JOURNAL OF NATURAL PRODUCTS 2019; 82:2419-2429. [PMID: 31503490 DOI: 10.1021/acs.jnatprod.8b00954] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Eight new limonoids, toononoids A-H (1-8), eight new B-seco-29-norlimonoids, toonanoronoids A-H (9-16), and seven known analogues were obtained from the EtOAc extract of the twigs and leaves of Toona ciliata. Compounds 2, 4, 8, and 16 are rare lactam-bearing limonoids. Compounds 1, 14, and 15 possess an unusual γ-methoxybutenolide moiety at C-17, while compounds 9, 10, and 15 have a rare 3β-hydroxy group. Their 2D structure and relative configurations were identified using spectroscopic data. The absolute configurations of 1, 9, 14, and 15 were established via X-ray diffraction crystallography or comparison of experimental and calculated ECD data. The cytotoxicity of the compounds was assessed toward five human tumor cell lines, and their anti-inflammatory activity was assessed based on NO production using LPS-stimulated RAW264.7 macrophages. Compounds 11 and 12 exerted inhibition toward two tumor cell lines (MCF-7, SW-480) with IC50 values between 2.1 and 3.7 μM, while 18-22 inhibited the proliferation of HL-60, MCF-7, and SW-480 cells (IC50 0.6-4.0 μM). Only compound 4 exhibited weak anti-inflammatory activity with an IC50 value of 28.3 μM.
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Affiliation(s)
- Guo-Lei Zhu
- State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany (KIB), Chinese Academy of Sciences (CAS) , Kunming 650201 , People's Republic of China
- Faculty of Chemical Engineering , Southwest Forestry University , Kunming 650224 , People's Republic of China
| | - Luo-Sheng Wan
- State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany (KIB), Chinese Academy of Sciences (CAS) , Kunming 650201 , People's Republic of China
| | - Xing-Rong Peng
- State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany (KIB), Chinese Academy of Sciences (CAS) , Kunming 650201 , People's Republic of China
| | - Qiang-Qiang Shi
- State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany (KIB), Chinese Academy of Sciences (CAS) , Kunming 650201 , People's Republic of China
| | - Xiao-Nian Li
- State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany (KIB), Chinese Academy of Sciences (CAS) , Kunming 650201 , People's Republic of China
| | - Jian-Chao Chen
- State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany (KIB), Chinese Academy of Sciences (CAS) , Kunming 650201 , People's Republic of China
| | - Lin Zhou
- State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany (KIB), Chinese Academy of Sciences (CAS) , Kunming 650201 , People's Republic of China
| | - Ming-Hua Qiu
- State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany (KIB), Chinese Academy of Sciences (CAS) , Kunming 650201 , People's Republic of China
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41
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Antimicrobial Lavandulylated Flavonoids from a Sponge-Derived Streptomyces sp. G248 in East Vietnam Sea. Mar Drugs 2019; 17:md17090529. [PMID: 31510079 PMCID: PMC6780759 DOI: 10.3390/md17090529] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Revised: 08/30/2019] [Accepted: 09/06/2019] [Indexed: 11/18/2022] Open
Abstract
Three new lavandulylated flavonoids, (2S,2″S)-6-lavandulyl-7,4′-dimethoxy-5,2′-dihydroxylflavanone (1), (2S,2″S)-6-lavandulyl-5,7,2′,4′-tetrahydroxylflavanone (2), and (2″S)-5′-lavandulyl-2′-methoxy-2,4,4′,6′-tetrahydroxylchalcone (3), along with seven known compounds 4–10 were isolated from culture broth of Streptomyces sp. G248. Their structures were established by spectroscopic data analysis, including 1D and 2D nuclear magnetic resonance (NMR), and high-resolution electrospray ionization mass spectrometry (HR-ESI-MS). The absolute configurations of 1–3 were resolved by comparison of their experimental and calculated electronic circular dichroism spectra. Compounds 1–3 exhibited remarkable antimicrobial activity. Whereas, two known compounds 4 and 5 exhibited inhibitory activity against Mycobacterium tuberculosis H37Rv with minimum inhibitory concentration (MIC) values of 6.0 µg/mL and 11.1 µg/mL, respectively.
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42
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Zhang J, Li Y, Ren F, Zhang Y, Liu X, Liu L, Che Y. Phomanolides C-F from a Phoma sp.: Meroterpenoids Generated via Hetero-Diels-Alder Reactions. JOURNAL OF NATURAL PRODUCTS 2019; 82:1678-1685. [PMID: 31120749 DOI: 10.1021/acs.jnatprod.9b00281] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Phomanolides C-F (1-4), four new meroterpenoids, were isolated from a Phoma sp., together with the known phomanolides A (5) and B (6); their structures were elucidated primarily by NMR experiments. The absolute configurations of 1-3 were assigned by electronic circular dichroism calculations, and that of 4 was established by X-ray diffraction analysis using Cu Kα radiation. Compounds 1-3 incorporate an unprecedented trioxa[4.4.3]propellane subunit in their skeletons. Compounds 2 and 4 were weakly cytotoxic.
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Affiliation(s)
- Jinyu Zhang
- State Key Laboratory of Toxicology & Medical Countermeasures , Beijing Institute of Pharmacology & Toxicology , Beijing 100850 , People's Republic of China
| | - Yumei Li
- State Key Laboratory of Toxicology & Medical Countermeasures , Beijing Institute of Pharmacology & Toxicology , Beijing 100850 , People's Republic of China
- Nanjing University of Chinese Medicine , Nanjing 210023 , People's Republic of China
| | - Fengxia Ren
- State Key Laboratory of Toxicology & Medical Countermeasures , Beijing Institute of Pharmacology & Toxicology , Beijing 100850 , People's Republic of China
| | - Yang Zhang
- State Key Laboratory of Toxicology & Medical Countermeasures , Beijing Institute of Pharmacology & Toxicology , Beijing 100850 , People's Republic of China
| | - Xingzhong Liu
- State Key Laboratory of Mycology , Institute of Microbiology, Chinese Academy of Sciences , Beijing 100101 , People's Republic of China
| | - Ling Liu
- State Key Laboratory of Mycology , Institute of Microbiology, Chinese Academy of Sciences , Beijing 100101 , People's Republic of China
| | - Yongsheng Che
- State Key Laboratory of Toxicology & Medical Countermeasures , Beijing Institute of Pharmacology & Toxicology , Beijing 100850 , People's Republic of China
- Institute of Medicinal Biotechnology , Chinese Academy of Medical Sciences & Peking Union Medical College , Beijing 100050 , People's Republic of China
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Meng J, Gu G, Dang P, Zhang X, Wang W, Dai J, Liu Y, Lai D, Zhou L. Sorbicillinoids From the Fungus Ustilaginoidea virens and Their Phytotoxic, Cytotoxic, and Antimicrobial Activities. Front Chem 2019; 7:435. [PMID: 31249829 PMCID: PMC6582230 DOI: 10.3389/fchem.2019.00435] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2019] [Accepted: 05/28/2019] [Indexed: 11/13/2022] Open
Abstract
Ustilaginoidea virens, the causal fungus of rice false smut, was found in previous studies to produce two types of metabolites, ustiloxins and ustilaginoidins. However, genome sequencing of U. virens revealed a plethora of secondary-metabolites-biosynthetic core genes that were capable to biosynthesize unreported metabolites. A large-scale fermentation of U. virens was thus performed, and the fungal extract was chemically re-investigated. After removing the known metabolites, we found a fraction containing unknown phytotoxic substances. Fractionation of this part has led to the isolation of six new sorbicillinoids, namely ustisorbicillinols A~F (1~6), and two new sorbicillinoid-related pyrones, named ustilopyrones A (7) and B (8), together with nine known cogeners (9~17). The structures of the new compounds were elucidated by analysis of their NMR, HRMS, and CD spectra, while ECD, 13C NMR and optical rotation calculations were additionally used for configurational assignments. Plausible biosynthetic pathways for the new compounds were proposed. Phytotoxicity assays revealed that the major sorbicillinoids (12~14, and 16) showed strong inhibition against the radicle and germ elongation of rice and lettuce seeds, with compound 12 displaying the strongest inhibition. The isolated compounds were also evaluated for their cytotoxic, antibacterial, and antifungal activities. Compounds 10, and 12~14 showed moderate cytotoxicities against the tested cell lines with IC50s of 8.83~74.7 μM. Compounds 2, and 10~13 were active against the tested bacteria (MICs 4~128 μg/mL), while compounds 11~13 displayed moderate antifungal activities.
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Affiliation(s)
- Jiajia Meng
- Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, China
| | - Gan Gu
- Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, China
| | - Pengqin Dang
- Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, China
| | - Xuping Zhang
- Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, China
| | - Weixuan Wang
- Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, China
| | - Jungui Dai
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Peking Union Medical College, Chinese Academy of Medical Science, Beijing, China
| | - Yang Liu
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Daowan Lai
- Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, China
| | - Ligang Zhou
- Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, China
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Nugroho AE, Morita H. Computationally-assisted discovery and structure elucidation of natural products. J Nat Med 2019; 73:687-695. [PMID: 31093833 PMCID: PMC6713678 DOI: 10.1007/s11418-019-01321-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 05/07/2019] [Indexed: 12/30/2022]
Abstract
Computer hardware development coupled with the development of quantum chemistry, new computational models and algorithms, and user-friendly interfaces have lowered the barriers to the use of computation in the discovery and structure elucidation of natural products. Consequently, the use of computational chemistry software as a tool to discover and determine the structure of natural products has become more common in recent years. In this review, we provide several examples of recent studies that used computer technology to facilitate the discovery and structure determination of various natural products.
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Affiliation(s)
- Alfarius Eko Nugroho
- Faculty of Pharmaceutical Sciences, Hoshi University, Ebara 2-4-41 Shinagawa-ku, Tokyo, 142-8501, Japan
| | - Hiroshi Morita
- Faculty of Pharmaceutical Sciences, Hoshi University, Ebara 2-4-41 Shinagawa-ku, Tokyo, 142-8501, Japan.
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45
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Robertson LP, Lucantoni L, Duffy S, Avery VM, Carroll AR. Acrotrione: An Oxidized Xanthene from the Roots of Acronychia pubescens. JOURNAL OF NATURAL PRODUCTS 2019; 82:1019-1023. [PMID: 30865443 DOI: 10.1021/acs.jnatprod.8b00956] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
A new oxidized xanthene, acrotrione (1), and two known acetophenones (2 and 3) were isolated from a methanol extract of the roots of Acronychia pubescens. The structure of 1 was elucidated on the basis of its (+)-HRESIMS, 2D NMR, and ECD data. Acritrione (1) contains an unusual oxidized furo[2,3- c]xanthene moiety that has not been previously reported. Moderate antiplasmodial activity for these natural products against chloroquine-sensitive (3D7) and chloroquine-resistant (Dd2) Plasmodium falciparum was determined with IC50 values ranging from 1.7 to 4.7 μM.
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Affiliation(s)
- Luke P Robertson
- Environmental Futures Research Institute , Griffith University , Gold Coast Campus , Southport 4222 , Australia
- Griffith Institute for Drug Discovery , Griffith University , Nathan Campus , Brisbane 4111 , Australia
| | - Leonardo Lucantoni
- Griffith Institute for Drug Discovery , Griffith University , Nathan Campus , Brisbane 4111 , Australia
| | - Sandra Duffy
- Griffith Institute for Drug Discovery , Griffith University , Nathan Campus , Brisbane 4111 , Australia
| | - Vicky M Avery
- Griffith Institute for Drug Discovery , Griffith University , Nathan Campus , Brisbane 4111 , Australia
| | - Anthony R Carroll
- Environmental Futures Research Institute , Griffith University , Gold Coast Campus , Southport 4222 , Australia
- Griffith Institute for Drug Discovery , Griffith University , Nathan Campus , Brisbane 4111 , Australia
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46
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Zhu S, Ren F, Guo Z, Liu J, Liu X, Liu G, Che Y. Rogersonins A and B, Imidazolone N-Oxide-Incorporating Indole Alkaloids from a verG Disruption Mutant of Clonostachys rogersoniana. JOURNAL OF NATURAL PRODUCTS 2019; 82:462-468. [PMID: 30576135 DOI: 10.1021/acs.jnatprod.8b00851] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Rogersonins A (1) and B (2), two new indole alkaloid-polyketide hybrids, have been isolated from cultures of a verG disruption mutant of the Cordyceps-colonizing fungus Clonostachys rogersoniana; their structures were elucidated primarily by NMR experiments. The absolute configurations of 1 and 2 were assigned using the modified Mosher method and via electronic circular dichroism and NMR calculations. Compounds 1 and 2 incorporate an imidazolone N-oxide moiety that has not been reported in any natural products.
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Affiliation(s)
- Shuaiming Zhu
- State Key Laboratory of Toxicology & Medical Countermeasures , Beijing Institute of Pharmacology & Toxicology , Beijing 100850 , People's Republic of China
| | - Fengxia Ren
- State Key Laboratory of Toxicology & Medical Countermeasures , Beijing Institute of Pharmacology & Toxicology , Beijing 100850 , People's Republic of China
| | - Zhe Guo
- Institute of Medicinal Plant Development , Chinese Academy of Medical Sciences & Peking Union Medical College , Beijing 100193 , People's Republic of China
| | - Jianghua Liu
- State Key Laboratory of Mycology, Institute of Microbiology , Chinese Academy of Sciences , Beijing 100101 , People's Republic of China
| | - Xingzhong Liu
- State Key Laboratory of Mycology, Institute of Microbiology , Chinese Academy of Sciences , Beijing 100101 , People's Republic of China
| | - Gang Liu
- State Key Laboratory of Mycology, Institute of Microbiology , Chinese Academy of Sciences , Beijing 100101 , People's Republic of China
| | - Yongsheng Che
- State Key Laboratory of Toxicology & Medical Countermeasures , Beijing Institute of Pharmacology & Toxicology , Beijing 100850 , People's Republic of China
- Institute of Medicinal Biotechnology , Chinese Academy of Medical Sciences & Peking Union Medical College , Beijing 100730 , People's Republic of China
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47
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Lai D, Meng J, Xu D, Zhang X, Liang Y, Han Y, Jiang C, Liu H, Wang C, Zhou L, Xu JR. Determination of the absolute configurations of the stereogenic centers of ustilaginoidins by studying the biosynthetic monomers from a gene knockout mutant of Villosiclava virens. Sci Rep 2019; 9:1855. [PMID: 30755627 PMCID: PMC6372653 DOI: 10.1038/s41598-018-37941-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Accepted: 12/05/2018] [Indexed: 12/26/2022] Open
Abstract
Ustilaginoidins are a kind of mycotoxins with 9,9'-linked bis-naphtho-γ-pyrones structures produced by the rice false smut pathogen Villosiclava virens. These metabolites displayed a wide range of bioactivities, such as teratogenic, cytotoxic, phytotoxic, and antibacterial activities. So far 26 ustilaginoidins have been isolated from V. virens, among which 18 compounds contained stereogenic center(s), however, most of them were unknown for the absolute configurations, except that of ustilaginoidin D. In this study, the absolute structures of these ustilaginoidins were constructed for the first time by analysis of the biosynthetic monomers obtained from a gene knockout mutant (ΔUV_2091) of V. virens. The gene UV_2091 was predicted to encode an enzyme that dimerized the monomeric naphtho-γ-pyrones in V. virens. Knockout of this gene led to the accumulation of three monomers, namely hemiustilaginoidin F (1), epihemiustilaginoidin D (2), and hemiustilaginoidin D (3), but the production of ustilaginoidins was completely blocked. The structures of the monomers were deduced by spectroscopic analysis, in combination with TDDFT ECD calculations for determining the absolute configurations. These compounds were tested for their phytotoxic, cytotoxic, antibacterial, and antifungal activities. Compounds 1 and 3 showed inhibition against the radicle and plumule elongation of rice and lettuce seeds at the tested concentrations. Compound 1 was active against the tested five human cancer cells, with half maximal inhibitory concentrations (IC50s) of 13.2~37.3 μM. Compounds 1~3 inhibited the growth of the tested pathogenic bacteria with minimum inhibitory concentrations of 8~32 µg/mL, while compound 3 exhibited antifungal activity against Magnaporthe oryzae (IC50, 5.21 µg/mL). A comparison of these data with those of the ustilaginoidins provided insights into the structure-bioactivity relationships.
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Affiliation(s)
- Daowan Lai
- Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, 100193, China
| | - Jiajia Meng
- Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, 100193, China
| | - Dan Xu
- Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, 100193, China
| | - Xuping Zhang
- Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, 100193, China
| | - Yafeng Liang
- Department of Plant Pathology, College of Plant Protection, Northwest A&F University, Yangling, 712100, China
| | - Yu Han
- Department of Plant Pathology, College of Plant Protection, Northwest A&F University, Yangling, 712100, China
| | - Cong Jiang
- Department of Plant Pathology, College of Plant Protection, Northwest A&F University, Yangling, 712100, China
| | - Huiquan Liu
- Department of Plant Pathology, College of Plant Protection, Northwest A&F University, Yangling, 712100, China
| | - Chenfang Wang
- Department of Plant Pathology, College of Plant Protection, Northwest A&F University, Yangling, 712100, China
| | - Ligang Zhou
- Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, 100193, China.
| | - Jin-Rong Xu
- Department of Plant Pathology, College of Plant Protection, Northwest A&F University, Yangling, 712100, China.
- Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN, 47907, United States.
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48
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Yoshida K, Nagai N, Ichikawa Y, Goto M, Kazuma K, Oyama KI, Koga K, Hashimoto M, Iuchi S, Takaya Y, Kondo T. Structure of two purple pigments, catechiopyranocyanidins A and B from the seed-coat of the small red bean, Vigna angularis. Sci Rep 2019; 9:1484. [PMID: 30728392 PMCID: PMC6365516 DOI: 10.1038/s41598-018-37641-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Accepted: 12/11/2018] [Indexed: 11/29/2022] Open
Abstract
The small red bean, Vigna angularis, is primarily used to produce the “an-paste” component of Japanese sweets. Through the manufacturing process, the red seed-coat pigment is transferred to the colorless “an-particles”, imparting a purple color. However, the major pigment in the seed coat has not yet been identified, although it is historically presumed to be an anthocyanin. Here, we report the isolation and structural determination of two hydrophobic purple pigments in the seed coat via instrumental analysis and derivatization. The new pigments, catechinopyranocyanidins A and B, contain a novel pyranoanthocyanidin skeleton condensed with a catechin and cyanidin ring system, and no sugar moieties. Catechinopyranocyanidins A and B are diastereomers with a different configuration at the catechin moiety, and both are purple in color in strongly acidic-to-neutral media. Catechinopyranocyanidins A and B are very stable under dark conditions, but, labile to light and decompose to colorless compounds. Thus, these pigments exhibit quite different chemical properties compared to simple anthocyanidins.
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Affiliation(s)
- Kumi Yoshida
- Graduate School of Informatics, Nagoya University, Chikusa, Nagoya, 464-8601, Japan.
| | - Nobukazu Nagai
- Graduate School of Information Sciences, Nagoya University, Chikusa, Nagoya, 464-8601, Japan
| | - Yoshiki Ichikawa
- Graduate School of Information Sciences, Nagoya University, Chikusa, Nagoya, 464-8601, Japan
| | - Miki Goto
- Graduate School of Human Informatics, Nagoya University, Chikusa, Nagoya, 464-8601, Japan
| | - Kohei Kazuma
- Graduate School of Informatics, Nagoya University, Chikusa, Nagoya, 464-8601, Japan
| | - Kin-Ichi Oyama
- Research Center for Materials Science, Nagoya University, Chikusa, Nagoya, 464-8602, Japan
| | - Kazushi Koga
- Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya, 464-8601, Japan
| | - Masaru Hashimoto
- Faculty of Agriculture and Life Science, Hirosaki University, 3 Bunkyo-cho, Hirosaki, 036-8561, Japan
| | - Satoru Iuchi
- Graduate School of Informatics, Nagoya University, Chikusa, Nagoya, 464-8601, Japan
| | - Yoshiaki Takaya
- Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tenpaku, Nagoya, 468-8503, Japan
| | - Tadao Kondo
- Graduate School of Informatics, Nagoya University, Chikusa, Nagoya, 464-8601, Japan
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49
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Lombe BK, Feineis D, Bringmann G. Dimeric naphthylisoquinoline alkaloids: polyketide-derived axially chiral bioactive quateraryls. Nat Prod Rep 2019; 36:1513-1545. [DOI: 10.1039/c9np00024k] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
This is the first review on dimeric naphthylisoquinolines, a group of structurally intriguing, biosynthetically unique, and pharmacologically promising alkaloids.
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Affiliation(s)
- Blaise Kimbadi Lombe
- Institute of Organic Chemistry
- University of Würzburg
- D-97074 Würzburg
- Germany
- Faculté des Sciences
| | - Doris Feineis
- Institute of Organic Chemistry
- University of Würzburg
- D-97074 Würzburg
- Germany
| | - Gerhard Bringmann
- Institute of Organic Chemistry
- University of Würzburg
- D-97074 Würzburg
- Germany
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50
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Oyama KI, Kimura Y, Iuchi S, Koga N, Yoshida K, Kondo T. Conversion of flavonol glycoside to anthocyanin: an interpretation of the oxidation–reduction relationship of biosynthetic flavonoid-intermediates. RSC Adv 2019; 9:31435-31439. [PMID: 35527956 PMCID: PMC9072432 DOI: 10.1039/c9ra06986k] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Accepted: 09/26/2019] [Indexed: 11/22/2022] Open
Abstract
An efficient conversion of rutin to the corresponding anthocyanin, cyanidin 3-O-rutinoside, was established. Clemmensen-type reduction of rutin gave a mixture of flav-2-en-3-ol and two flav-3-en-3-ols, which were easily oxidised by air to give the anthocyanin. The interconversion reactions of these flavonoids provide insight into their biosynthetic pathway. An efficient conversion of rutin to the corresponding anthocyanin, cyanidin 3-O-rutinoside by Clemmensen-type reduction followed by air oxidation was established.![]()
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Affiliation(s)
- Kin-ichi Oyama
- Research Institute for Materials Science
- Nagoya University
- Nagoya 464-8602
- Japan
| | - Yuki Kimura
- Graduate School of Information Sciences
- Nagoya University
- Nagoya 464-8601
- Japan
| | - Satoru Iuchi
- Graduate School of Informatics
- Nagoya University
- Nagoya 464-8601
- Japan
| | - Nobuaki Koga
- Graduate School of Informatics
- Nagoya University
- Nagoya 464-8601
- Japan
| | - Kumi Yoshida
- Graduate School of Informatics
- Nagoya University
- Nagoya 464-8601
- Japan
| | - Tadao Kondo
- Graduate School of Informatics
- Nagoya University
- Nagoya 464-8601
- Japan
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