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Phang YL, Liu S, Zheng C, Xu H. Recent advances in the synthesis of natural products containing the phloroglucinol motif. Nat Prod Rep 2022; 39:1766-1802. [PMID: 35762867 DOI: 10.1039/d1np00077b] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Covering: June 2009 to 2021Natural products containing a phloroglucinol motif include simple and oligomeric phloroglucinols, polycyclic polyprenylated acylphloroglucinols, phloroglucinol-terpenes, xanthones, flavonoids, and coumarins. These compounds represent a major class of secondary metabolites which exhibit a wide range of biological activities such as antimicrobial, anti-inflammatory, antioxidant and hypoglycaemic properties. A number of these compounds have been authorized for therapeutic use or are currently being studied in clinical trials. Their structural diversity and utility in both traditional and conventional medicine have made them popular synthetic targets over the years. In this review, we compile and summarise the recent synthetic approaches to the natural products bearing a phloroglucinol motif. Focus has been given on ingenious strategies to functionalize the phloroglucinol moiety at multiple positions. The isolation and bioactivities of the compounds are also provided.
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Affiliation(s)
- Yee Lin Phang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China. .,Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai 201203, China
| | - Song Liu
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China. .,Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai 201203, China
| | - Changwu Zheng
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China. .,Engineering Research Center of Shanghai Colleges for TCM New Drug Discovery, Shanghai 201203, China
| | - Hongxi Xu
- Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China.
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2
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Lu X, Zhang Y, Zhang W, Wang H, Zhang J, Wang S, Tan H. Cyclohexanone and Phenolic Acid Derivatives from Endophytic Fungus Diaporthe foeniculina. Front Chem 2021; 9:738307. [PMID: 34540805 PMCID: PMC8440800 DOI: 10.3389/fchem.2021.738307] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Accepted: 08/03/2021] [Indexed: 11/21/2022] Open
Abstract
Chemical investigation of an endophytic fungus Diaporthe foeniculina SCBG-15, led to the isolation of eight new cyclohexanone derivatives, foeniculins A–H (1–8) and three new phenolic acid derivatives, foeniculins I–K (9–11). Their structures were extensively established on the basis of 1H and 13C NMR spectra together with COSY, HSQC, HMBC, and NOESY experiments. The absolute configurations were confirmed by quantum chemical ECD calculations and single-crystal X-ray diffractions. Moreover, the in vitro cytotoxic and antibacterial activities of isolated compounds 1–11 were also evaluated.
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Affiliation(s)
- Xiuxiang Lu
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Yanjiang Zhang
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Wenge Zhang
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Huan Wang
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China.,National Engineering Research Center of Navel Orange, Gannan Normal University, Ganzhou, China
| | - Jun Zhang
- National Engineering Research Center of Navel Orange, Gannan Normal University, Ganzhou, China
| | - Sasa Wang
- Key Laboratory of Chemistry and Engineering of Forest Products, Guangxi University for Nationalities, Nanning, China
| | - Haibo Tan
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China.,National Engineering Research Center of Navel Orange, Gannan Normal University, Ganzhou, China
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3
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Deng LM, Hu LJ, Tang W, Liu JX, Huang XJ, Li YY, Li YL, Ye WC, Wang Y. A biomimetic synthesis-enabled stereochemical assignment of rhodotomentones A and B, two unusual caryophyllene-derived meroterpenoids from Rhodomyrtus tomentosa. Org Chem Front 2021. [DOI: 10.1039/d1qo00989c] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Rhodotomentones A and B (1 and 2), two unusual caryophyllene-derived meroterpenoids (CDMTs) featuring a rare 6/6/9/4/6/6 hexacyclic ring system, along with their biogenetically-related CDMTs 7 and 12–15, were isolated from Rhodomyrtus tomentosa.
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Affiliation(s)
- Lu-Ming Deng
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Li-Jun Hu
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Wei Tang
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Jia-Xin Liu
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Xiao-Jun Huang
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Yue-Yue Li
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Yao-Lan Li
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Wen-Cai Ye
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
| | - Ying Wang
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, People's Republic of China
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, People's Republic of China
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4
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Polymethylated acylphloroglucinols from Rhodomyrtus tomentosa exert acetylcholinesterase inhibitory effects. Bioorg Chem 2020; 107:104519. [PMID: 33293058 DOI: 10.1016/j.bioorg.2020.104519] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 11/24/2020] [Accepted: 11/25/2020] [Indexed: 11/22/2022]
Abstract
Chemical investigation of the twigs and leaves of Rhodomyrtus tomentosa led to the isolation and structural identification of a novel polymethylated phloroglucinol meroterpenoid (PPM) featuring a 6/6/6/6 tetracyclic system, rhotomentodione F (1), five new polymethylated polycyclic phloroglucinols (PPPs) with a rare bis-furan framework, rhotomentosones A-E (2-6), and one new adduct composed of an acylphloroglucinol and two β-triketone units, rhotomentosone F (7), as well as five known analogues (8-12). Their structures and absolute configurations were unambiguously determined by comprehensive spectroscopic data and electronic circular dichroism (ECD) calculations. All isolates were evaluated for their anti-inflammatory and acetylcholinesterase (AChE) inhibitory activities. Compound 6 displayed significant AChE inhibitory effect with an IC50 value of 8.68 μM. Further molecular docking studies of 6 revealed that the interactions with AChE residues Ser125, Glu202, and Tyr133 are crucial for AChE inhibitory activity. The current study not only enriches the chemical diversity of phloroglucinols in Myrtaceae species, but also provides potential lead compounds for the further design and development of new AChE inhibitors to treat Alzheimer's disease.
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Deng X, Wang XR, Wu L. Triketone-terpene meroterpenoids from the leaves of Rhodomyrtus tomentosa. Fitoterapia 2020; 143:104585. [PMID: 32247054 DOI: 10.1016/j.fitote.2020.104585] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 03/28/2020] [Accepted: 03/30/2020] [Indexed: 11/16/2022]
Abstract
Eight new meroterpenoids (1-8) featuring β-triketone-conjugated terpenoids, rtomentones A-H, were isolated from the leaves of Rhodomyrtus tomentosa. Structures of the isolates were unambiguously established by a combination of NMR and ECD spectroscopy and X-ray diffraction analysis. Rtomentone C (3) was the first example of aromadendrane-based meroterpenoid containing an oxa-spiro[5.6] ring. Rtomentone D (4) was obtained as a racemic mixture confirmed by chiral HPLC analysis. The cytotoxicity against MDA-MB-231, A549, and DLD-1 cells of all isolates was evaluated.
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Affiliation(s)
- Xin Deng
- School of Pharmacy, Anhui Medical University, Hefei 230032, People's Republic of China
| | - Xiu-Rong Wang
- School of Pharmacy, Anhui Medical University, Hefei 230032, People's Republic of China
| | - Lin Wu
- School of Pharmacy, Anhui Medical University, Hefei 230032, People's Republic of China.
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6
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Wang M, Zhao L, Chen K, Shang Y, Wu J, Guo X, Chen Y, Liu H, Tan H, Qiu SX. Antibacterial sesquiterpenes from the stems and roots of Thuja sutchuenensis. Bioorg Chem 2020; 96:103645. [DOI: 10.1016/j.bioorg.2020.103645] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Revised: 12/21/2019] [Accepted: 01/30/2020] [Indexed: 12/20/2022]
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7
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Yan DW, Huang CD, Zheng HH, Zhao N, Feng XL, Ma SJ, Zhang AL, Zhang Q. Meroterpene-Like α-Glucosidase Inhibitors Based on Biomimetic Reactions Starting from β-Caryophyllene. Molecules 2020; 25:molecules25020260. [PMID: 31936396 PMCID: PMC7024386 DOI: 10.3390/molecules25020260] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Revised: 01/06/2020] [Accepted: 01/07/2020] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Natural meroterpenes derived from phloroglucinols and β-caryophyllene have shown high inhibitory activity against α-glucosidase or cancer cells, however, the chemical diversity of this type of skeletons in Nature is limited. METHODS To expand the chemical space and explore their inhibitory activities against α-glucosidase (EC 3.2.1.20), we employed β-caryophyllene and some natural moieties (4-hydroxycoumarins, lawsone or syncarpic acid) to synthesize new types of meroterpene-like skeletons. All the products (including side products) were isolated and characterized by NMR, HR-MS, and ECD. RESULTS In total, 17 products (representing seven scaffolds) were generated through a one-pot procedure. Most products (12 compounds) showed more potential activity (IC50 < 25 μM) than the positive controls (acarbose and genistein, IC50 58.19, and 54.74 μM, respectively). Compound 7 exhibited the most potent inhibition of α-glucosidase (IC50 3.56 μM) in a mixed-type manner. The CD analysis indicated that compound 7 could bind to α-glucosidase and influence the enzyme's secondary structure. CONCLUSIONS Compound 7 could serve as a new type of template compound to develop α-glucosidase inhibitors. Full investigation of a biomimic reaction can be used as a concise strategy to explore diverse natural-like skeletons and search for novel lead compounds.
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Affiliation(s)
- Da-Wei Yan
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, China; (D.-W.Y.); (C.-D.H.); (H.-H.Z.); (N.Z.); (S.-J.M.)
| | - Cheng-Di Huang
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, China; (D.-W.Y.); (C.-D.H.); (H.-H.Z.); (N.Z.); (S.-J.M.)
| | - Hang-Hang Zheng
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, China; (D.-W.Y.); (C.-D.H.); (H.-H.Z.); (N.Z.); (S.-J.M.)
| | - Na Zhao
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, China; (D.-W.Y.); (C.-D.H.); (H.-H.Z.); (N.Z.); (S.-J.M.)
| | - Xiao-Lan Feng
- College of Veterinary Medicine, Northwest A&F University, Yangling 712100, China;
| | - Shuang-Jiang Ma
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, China; (D.-W.Y.); (C.-D.H.); (H.-H.Z.); (N.Z.); (S.-J.M.)
| | - An-Ling Zhang
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, China; (D.-W.Y.); (C.-D.H.); (H.-H.Z.); (N.Z.); (S.-J.M.)
- Correspondence: (A.-L.Z.); (Q.Z.); Tel.: +86-1809-272-0670 (Q.Z.)
| | - Qiang Zhang
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, China; (D.-W.Y.); (C.-D.H.); (H.-H.Z.); (N.Z.); (S.-J.M.)
- Correspondence: (A.-L.Z.); (Q.Z.); Tel.: +86-1809-272-0670 (Q.Z.)
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8
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Prenylated stilbenes and flavonoids from the leaves of Cajanus cajan. Chin J Nat Med 2019; 17:381-386. [DOI: 10.1016/s1875-5364(19)30044-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Indexed: 11/24/2022]
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9
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Qin XJ, Rauwolf TJ, Li PP, Liu H, McNeely J, Hua Y, Liu HY, Porco JA. Isolation and Synthesis of Novel Meroterpenoids from Rhodomyrtus tomentosa: Investigation of a Reactive Enetrione Intermediate. Angew Chem Int Ed Engl 2019; 58:4291-4296. [PMID: 30681258 PMCID: PMC6583783 DOI: 10.1002/anie.201814421] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Indexed: 01/19/2023]
Abstract
Rhodomyrtusials A-C, the first examples of triketone-sesquiterpene meroterpenoids featuring a unique 6/5/5/9/4 fused pentacyclic ring system were isolated from Rhodomyrtus tomentosa, along with several biogenetically-related dihydropyran isomers. Two bis-furans and one dihydropyran isomer showed acetylcholinesterase (AChE) inhibitory activity. Structures of the isolates were unambiguously established by a combination of spectroscopic data, ECD analysis, and total synthesis. Bioinspired total syntheses of six isolates were achieved in six steps utilizing a reactive enetrione intermediate generated in situ from a readily available hydroxy-endoperoxide precursor.
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Affiliation(s)
- Xu-Jie Qin
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences Kunming 650201 (P. R. China)
| | - Tyler J. Rauwolf
- Department of Chemistry, Center for Molecular Discovery (BUCMD), Boston University 590 Commonwealth Avenue, Boston, MA 02215 (USA)
| | - Pan-Pan Li
- College of Forestry, Southwest Forestry University Kunming 650224 (P. R. China)
| | - Hui Liu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences Kunming 650201 (P. R. China)
| | - James McNeely
- Department of Chemistry, Center for Molecular Discovery (BUCMD), Boston University 590 Commonwealth Avenue, Boston, MA 02215 (USA)
| | - Yan Hua
- College of Forestry, Southwest Forestry University Kunming 650224 (P. R. China)
| | - Hai-Yang Liu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences Kunming 650201 (P. R. China)
| | - John A. Porco
- Department of Chemistry, Center for Molecular Discovery (BUCMD), Boston University 590 Commonwealth Avenue, Boston, MA 02215 (USA)
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Guo X, Wang M, Wu J, Wu G, Zhang X, Huo L, Liu H, Chen Y, Xie G, Tan H, Qiu SX. Chemical constituents of the trunks and roots of Thuja sutchuenensis. Fitoterapia 2019; 134:264-269. [PMID: 30825577 DOI: 10.1016/j.fitote.2019.02.025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2019] [Revised: 02/22/2019] [Accepted: 02/26/2019] [Indexed: 12/11/2022]
Abstract
Five new compounds including two stilbenes, designated thujasutchins A (1) and B (2), two phenolic compounds namely thujasutchins C (3) and D (4), as well as one sesquiterpene thujasutchin E (5), were isolated from the 95% ethanolic extract from the trunks and roots of Thuja sutchuenensis. Their structures were determined by means of extensively spectroscopic analysis including UV, IR, HRESIMS, 1H and 13C NMR (COSY, HSQC, HMBC). Moreover, compounds 1, 3-5 were evaluated for in vitro cytotoxic activities against SF-268, MCF-7, HepG-2, and A549 tumor cell lines.
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Affiliation(s)
- Xueying Guo
- School of Life Sciences, Guangzhou University, Guangzhou 510006, People's Republic of China; Program of Natural Product Medicinal Chemistry, Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, People's Republic of China
| | - Miaomiao Wang
- Program of Natural Product Medicinal Chemistry, Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, People's Republic of China; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Jiafeng Wu
- Program of Natural Product Medicinal Chemistry, Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, People's Republic of China
| | - Guiyun Wu
- Program of Natural Product Medicinal Chemistry, Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, People's Republic of China
| | - Xiao Zhang
- Program of Natural Product Medicinal Chemistry, Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, People's Republic of China
| | - Luqiong Huo
- Program of Natural Product Medicinal Chemistry, Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, People's Republic of China; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Hongxin Liu
- Guangdong Institute of Microbiology, Guangzhou 510070, People's Republic of China
| | - Yihong Chen
- Guangzhou Green Health Biotechnology Co., Ltd., Guangzhou, People's Republic of China
| | - Guowen Xie
- School of Life Sciences, Guangzhou University, Guangzhou 510006, People's Republic of China.
| | - Haibo Tan
- Program of Natural Product Medicinal Chemistry, Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, People's Republic of China.
| | - Sheng-Xiang Qiu
- Program of Natural Product Medicinal Chemistry, Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, People's Republic of China.
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11
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Qin X, Rauwolf TJ, Li P, Liu H, McNeely J, Hua Y, Liu H, Porco JA. Isolation and Synthesis of Novel Meroterpenoids from
Rhodomyrtus tomentos
a: Investigation of a Reactive Enetrione Intermediate. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201814421] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Xu‐Jie Qin
- State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of Botany Chinese Academy of Sciences Kunming 650201 P. R. China
| | - Tyler J. Rauwolf
- Department of Chemistry Center for Molecular Discovery (BU-CMD) Boston University 590 Commonwealth Avenue Boston MA 02215 USA
| | - Pan‐Pan Li
- College of Forestry Southwest Forestry University Kunming 650224 P. R. China
| | - Hui Liu
- State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of Botany Chinese Academy of Sciences Kunming 650201 P. R. China
| | - James McNeely
- Department of Chemistry Center for Molecular Discovery (BU-CMD) Boston University 590 Commonwealth Avenue Boston MA 02215 USA
| | - Yan Hua
- College of Forestry Southwest Forestry University Kunming 650224 P. R. China
| | - Hai‐Yang Liu
- State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of Botany Chinese Academy of Sciences Kunming 650201 P. R. China
| | - John A. Porco
- Department of Chemistry Center for Molecular Discovery (BU-CMD) Boston University 590 Commonwealth Avenue Boston MA 02215 USA
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12
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Luo D, Zhang YB, Huang J, Chen LF, He LJ, Kuang GK, Qin J, Li QG, Wang GC, Li YL. One New Sesquiterpene from the Leaves of Rhodomyrtus tomentosa. CHEM LETT 2019. [DOI: 10.1246/cl.180746] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Ding Luo
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, P. R. China
| | - Yu-Bo Zhang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, P. R. China
- Integrated Chinese and Western Medicine Postdoctoral Research Station, Jinan University, Guangzhou 510632, P. R. China
| | - Jie Huang
- Southwest Pharmaceutical Co., Ltd., Chongqing 4000038, P. R. China
| | - Li-Feng Chen
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, P. R. China
| | - Li-Jun He
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, P. R. China
| | - Guang-Kai Kuang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, P. R. China
| | - Juan Qin
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, P. R. China
| | - Qing-Guo Li
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, P. R. China
| | - Guo-Cai Wang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, P. R. China
| | - Yao-Lan Li
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, P. R. China
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13
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Xu J, Zhu HL, Zhang J, Liu WY, Luo JG, Pan K, Cao WY, Bi QR, Feng F, Qu W. Littordials A–E, novel formyl-phloroglucinol-β-caryophyllene meroterpenoids from the leaves of Psidium littorale. Org Chem Front 2019. [DOI: 10.1039/c9qo00174c] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Littordials A–E (1–5), featuring unusual acyl phloroglucinol units, were isolated from the leaves of Psidium littorale. 2, 3 and 5 exhibited significant cytotoxic activities on MDA-MB-231 and B16 cell lines.
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14
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YANG GX, MA GL, LI H, HUANG T, XIONG J, HU JF. Advanced natural products chemistry research in China between 2015 and 2017. Chin J Nat Med 2018; 16:881-906. [DOI: 10.1016/s1875-5364(18)30131-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2018] [Indexed: 10/27/2022]
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15
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Senadeera SPD, Robertson LP, Duffy S, Wang Y, Avery VM, Carroll AR. β-Triketone-Monoterpene Hybrids from the Flowers of the Australian Tree Corymbia intermedia. JOURNAL OF NATURAL PRODUCTS 2018; 81:2455-2461. [PMID: 30398871 DOI: 10.1021/acs.jnatprod.8b00494] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Four new β-triketone monoterpene hybrids, intermediones A-D (1-4), have been identified from the flowers of the Australian eucalypt tree Corymbia intermedia. Intermediones A-D are β-triketones that incorporate a pinene moiety attached via a benzyl group to a syncarpic acid. The structures of 1-4, including relative configurations, were elucidated from the analysis of 1D/2D NMR and MS data. The absolute configurations of intermediones A and B were determined by comparison of experimental and predicted ECD spectra. Intermedione D possesses a tetracyclic ring system that is related to that found in the meroterpenes, guadials B and C. Low to moderate antiplasmodial activity toward the chloroquine-sensitive (3D7) strain of Plasmodium falciparum, with IC50 values ranging from 9.9 to 20.8 μM, was observed for intermediones A, B, and D.
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Affiliation(s)
- Sarath P D Senadeera
- Environmental Futures Research Institute , Griffith University , Gold Coast , QLD 4222 , Australia
- Griffith Institute for Drug Discovery , Griffith University , Brisbane , QLD 4111 , Australia
| | - Luke P Robertson
- Environmental Futures Research Institute , Griffith University , Gold Coast , QLD 4222 , Australia
- Griffith Institute for Drug Discovery , Griffith University , Brisbane , QLD 4111 , Australia
| | - Sandra Duffy
- Griffith Institute for Drug Discovery , Griffith University , Brisbane , QLD 4111 , Australia
| | - Yun Wang
- Environmental Futures Research Institute , Griffith University , Gold Coast , QLD 4222 , Australia
| | - Vicky M Avery
- Griffith Institute for Drug Discovery , Griffith University , Brisbane , QLD 4111 , Australia
| | - Anthony R Carroll
- Environmental Futures Research Institute , Griffith University , Gold Coast , QLD 4222 , Australia
- Griffith Institute for Drug Discovery , Griffith University , Brisbane , QLD 4111 , Australia
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16
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Brachyanins A-C, pinene-derived meroterpenoids and phloroglucinol derivative from Leptospermum brachyandrum. Fitoterapia 2018; 130:184-189. [DOI: 10.1016/j.fitote.2018.08.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Revised: 08/26/2018] [Accepted: 08/29/2018] [Indexed: 01/24/2023]
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17
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Zhang YB, Li W, Jiang L, Yang L, Chen NH, Wu ZN, Li YL, Wang GC. Cytotoxic and anti-inflammatory active phloroglucinol derivatives from Rhodomyrtus tomentosa. PHYTOCHEMISTRY 2018; 153:111-119. [PMID: 29906657 DOI: 10.1016/j.phytochem.2018.05.018] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 05/24/2018] [Accepted: 05/27/2018] [Indexed: 06/08/2023]
Abstract
Seven undescribed phloroglucinol derivatives, tomentodiones N-T, and eleven known ones were isolated from Rhodomyrtus tomentosa. Tomentodione N is the first example of a β-triketone unit coupled with an isoamyl alcohol through a furan fused-ring, and tomentodiones N, S, T were three racemates. The undescribed structures were elucidated by means of spectroscopic, X-ray diffraction, electronic circular dichroism calculation, and chemical methods. In addition, the isolated compounds were determined for the cytotoxic activities on HeLa cells and anti-inflammatory activities in LPS-stimulated RAW 264.7 cells.
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MESH Headings
- Animals
- Anti-Inflammatory Agents, Non-Steroidal/chemistry
- Anti-Inflammatory Agents, Non-Steroidal/isolation & purification
- Anti-Inflammatory Agents, Non-Steroidal/pharmacology
- Antineoplastic Agents, Phytogenic/chemistry
- Antineoplastic Agents, Phytogenic/isolation & purification
- Antineoplastic Agents, Phytogenic/pharmacology
- Cell Proliferation/drug effects
- Cell Survival/drug effects
- Chlorocebus aethiops
- Crystallography, X-Ray
- Dose-Response Relationship, Drug
- Drug Screening Assays, Antitumor
- HeLa Cells
- Humans
- Lipopolysaccharides/antagonists & inhibitors
- Lipopolysaccharides/pharmacology
- Mice
- Models, Molecular
- Molecular Structure
- Myrtaceae/chemistry
- Nitric Oxide/antagonists & inhibitors
- Nitric Oxide/biosynthesis
- Phloroglucinol/analogs & derivatives
- Phloroglucinol/chemistry
- Phloroglucinol/pharmacology
- RAW 264.7 Cells
- Structure-Activity Relationship
- Vero Cells
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Affiliation(s)
- Yu-Bo Zhang
- Institute of Traditional Chinese Medicine & Natural Products, Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, PR China; Integrated Chinese and Western Medicine Postdoctoral Research Station, Jinan University, Guangzhou 510632, PR China
| | - Wen Li
- Institute of Traditional Chinese Medicine & Natural Products, Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, PR China
| | - Lin Jiang
- Institute of Traditional Chinese Medicine & Natural Products, Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, PR China
| | - Li Yang
- Institute of Traditional Chinese Medicine & Natural Products, Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, PR China
| | - Neng-Hua Chen
- Institute of Traditional Chinese Medicine & Natural Products, Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, PR China
| | - Zhong-Nan Wu
- Institute of Traditional Chinese Medicine & Natural Products, Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, PR China
| | - Yao-Lan Li
- Institute of Traditional Chinese Medicine & Natural Products, Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, PR China.
| | - Guo-Cai Wang
- Institute of Traditional Chinese Medicine & Natural Products, Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, PR China; Integrated Chinese and Western Medicine Postdoctoral Research Station, Jinan University, Guangzhou 510632, PR China.
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18
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Liu J, Song JG, Su JC, Huang XJ, Ye WC, Wang Y. Tomentodione E, a new sec-pentyl syncarpic acid-based meroterpenoid from the leaves of Rhodomyrtus tomentosa. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2018; 20:67-74. [PMID: 28429610 DOI: 10.1080/10286020.2017.1318852] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Accepted: 04/06/2017] [Indexed: 06/07/2023]
Abstract
A new meroterpenoid, tomentodione E (1), along with four known ones (2-5) were isolated from the leaves of Rhodomyrtus tomentosa. Their structures were elucidated based on extensive spectroscopic data as well as computational methods. Compound 1 represents the first example of meroterpenoid possessing a sec-pentyl syncarpic acid motif coupled with a caryophyllene. Compounds 1-4 were evaluated for their in vitro antiviral activity against respiratory syncytial virus (RSV) with cytopathic effect (CPE) reduction assay, and 2 showed potent in vitro anti-RSV effect.
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Affiliation(s)
- Jie Liu
- a Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research , Jinan University , Guangzhou 510632 , China
- b JNU-HKUST Joint Laboratory for Neuroscience & Innovative Drug Research , College of Pharmacy, Jinan University , Guangzhou 510632 , China
| | - Jian-Guo Song
- a Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research , Jinan University , Guangzhou 510632 , China
- b JNU-HKUST Joint Laboratory for Neuroscience & Innovative Drug Research , College of Pharmacy, Jinan University , Guangzhou 510632 , China
| | - Jun-Cheng Su
- a Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research , Jinan University , Guangzhou 510632 , China
- b JNU-HKUST Joint Laboratory for Neuroscience & Innovative Drug Research , College of Pharmacy, Jinan University , Guangzhou 510632 , China
| | - Xiao-Jun Huang
- a Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research , Jinan University , Guangzhou 510632 , China
- b JNU-HKUST Joint Laboratory for Neuroscience & Innovative Drug Research , College of Pharmacy, Jinan University , Guangzhou 510632 , China
| | - Wen-Cai Ye
- a Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research , Jinan University , Guangzhou 510632 , China
- b JNU-HKUST Joint Laboratory for Neuroscience & Innovative Drug Research , College of Pharmacy, Jinan University , Guangzhou 510632 , China
| | - Ying Wang
- a Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research , Jinan University , Guangzhou 510632 , China
- b JNU-HKUST Joint Laboratory for Neuroscience & Innovative Drug Research , College of Pharmacy, Jinan University , Guangzhou 510632 , China
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19
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Ma SJ, Yu J, Yan DW, Wang DC, Gao JM, Zhang Q. Meroterpene-like compounds derived from β-caryophyllene as potent α-glucosidase inhibitors. Org Biomol Chem 2018; 16:9454-9460. [DOI: 10.1039/c8ob02687d] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Tween four meroterpene-like compounds were synthesized by combining natural moieties, which provide a new class of inhibitors against α-glucosidase.
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Affiliation(s)
- Shuang-Jiang Ma
- Shaanxi Key Laboratory of Natural Products & Chemical Biology
- College of Chemistry & Pharmacy
- Northwest A&F University
- Yangling 712100
- PR China
| | - Jie Yu
- Shaanxi Key Laboratory of Natural Products & Chemical Biology
- College of Chemistry & Pharmacy
- Northwest A&F University
- Yangling 712100
- PR China
| | - Da-Wei Yan
- Shaanxi Key Laboratory of Natural Products & Chemical Biology
- College of Chemistry & Pharmacy
- Northwest A&F University
- Yangling 712100
- PR China
| | - Da-Cheng Wang
- Shaanxi Key Laboratory of Natural Products & Chemical Biology
- College of Chemistry & Pharmacy
- Northwest A&F University
- Yangling 712100
- PR China
| | - Jin-Ming Gao
- Shaanxi Key Laboratory of Natural Products & Chemical Biology
- College of Chemistry & Pharmacy
- Northwest A&F University
- Yangling 712100
- PR China
| | - Qiang Zhang
- Shaanxi Key Laboratory of Natural Products & Chemical Biology
- College of Chemistry & Pharmacy
- Northwest A&F University
- Yangling 712100
- PR China
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20
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Liu H, Huo L, Yang B, Yuan Y, Zhang W, Xu Z, Qiu S, Tan H. Biomimetic-Inspired Syntheses of Myrtucommuacetalone and Myrtucommulone J. Org Lett 2017; 19:4786-4789. [DOI: 10.1021/acs.orglett.7b02159] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Hongxin Liu
- State
Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial
Key Laboratory of Microbial Culture Collection and Application, Guangdong
Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangzhou 510070, P.R. China
- Key
Laboratory of Plant Resources Conservation and Sustainable Utilization,
Guangdong Provincial Key Laboratory of Applied Botany, South China
Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, P.R. China
| | - Luqiong Huo
- Key
Laboratory of Plant Resources Conservation and Sustainable Utilization,
Guangdong Provincial Key Laboratory of Applied Botany, South China
Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, P.R. China
| | - Bao Yang
- Key
Laboratory of Plant Resources Conservation and Sustainable Utilization,
Guangdong Provincial Key Laboratory of Applied Botany, South China
Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, P.R. China
| | - Yunfei Yuan
- Key
Laboratory of Plant Resources Conservation and Sustainable Utilization,
Guangdong Provincial Key Laboratory of Applied Botany, South China
Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, P.R. China
| | - Weimin Zhang
- State
Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial
Key Laboratory of Microbial Culture Collection and Application, Guangdong
Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangzhou 510070, P.R. China
| | - Zhifang Xu
- Key
Laboratory of Plant Resources Conservation and Sustainable Utilization,
Guangdong Provincial Key Laboratory of Applied Botany, South China
Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, P.R. China
| | - Shengxiang Qiu
- Key
Laboratory of Plant Resources Conservation and Sustainable Utilization,
Guangdong Provincial Key Laboratory of Applied Botany, South China
Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, P.R. China
| | - Haibo Tan
- Key
Laboratory of Plant Resources Conservation and Sustainable Utilization,
Guangdong Provincial Key Laboratory of Applied Botany, South China
Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, P.R. China
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21
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Abstract
Phytochemical study on the leaves of Melaleuca bracteata resulted in the isolation of ten compounds including three new neolignans, named melaleucins A-C (1-3). Among them, melaleucin B shares a rarely occurring nor-neolignan skeleton, and both melaleucins B and C bear a novel aldehyde moiety, which might also be response for the delicate fragrance of M. bracteata. Their structures were extensively assigned by spectral data interpretation and biomimetic total synthesis. Moreover, their biosynthetic pathway with oxidative radical coupling and Michael addition as critical reactions was also confirmed. The antimicrobial activity evaluation revealed that melaleucin A exhibited considerable antimicrobial activity towards methicillin-resistant Staphylococcus aureus.
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Affiliation(s)
- Can Li
- Program for Natural Product Chemical Biology, Key Laboratory Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China; Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou 510642, China
| | - Hongxin Liu
- Program for Natural Product Chemical Biology, Key Laboratory Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China; State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangzhou 510070, China
| | - Liyun Zhao
- Program for Natural Product Chemical Biology, Key Laboratory Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
| | - Weimin Zhang
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangzhou 510070, China
| | - Shengxiang Qiu
- Program for Natural Product Chemical Biology, Key Laboratory Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
| | - Xiaoyun Yang
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou 510642, China.
| | - Haibo Tan
- Program for Natural Product Chemical Biology, Key Laboratory Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China.
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22
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Xiang YQ, Liu HX, Zhao LY, Xu ZF, Tan HB, Qiu SX. Callistemenonone A, a novel dearomatic dibenzofuran-type acylphloroglucinol with antimicrobial activity from Callistemon viminalis. Sci Rep 2017; 7:2363. [PMID: 28539599 PMCID: PMC5443826 DOI: 10.1038/s41598-017-02441-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Accepted: 04/11/2017] [Indexed: 11/21/2022] Open
Abstract
A new acylphloroglucinol with a novel architecture including an unprecedented dearomatic dibenzofuran core, named callistemenonone A (1), was isolated from the leaves of Callistemon viminalis (Myrtaceae). The structure was fully characterized on the basis of extensive spectroscopic analysis, including UV, HRESIMS, as well as 1D and 2D NMR spectral data (HSQC, HMBC, and ROESY). The deduced structure represents the first example of a natural dibenzofuran with two phenyl moieties coupling through tertiary hydroxy and ketal carbons. A plausible biogenetic pathway involving oxidative coupling and dearomatization as key steps is proposed to account for the biosynthesis of this novel class of dibenzofuran. Moreover, antimicrobial assays, in conjunction with the time-killing and biophysical studies, revealed that 1 exerted potent bactericidal activity against a panel of methicillin resistant pathogenic microbes with a unique mechanism.
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Affiliation(s)
- Yu-Qing Xiang
- Program for Natural Product Chemical Biology, Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, People's Republic of China
| | - Hong-Xin Liu
- Program for Natural Product Chemical Biology, Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, People's Republic of China.,State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangzhou, 510070, People's Republic of China
| | - Li-Yun Zhao
- Program for Natural Product Chemical Biology, Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, People's Republic of China.,Graduate University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Zhi-Fang Xu
- Program for Natural Product Chemical Biology, Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, People's Republic of China
| | - Hai-Bo Tan
- Program for Natural Product Chemical Biology, Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, People's Republic of China.
| | - Sheng-Xiang Qiu
- Program for Natural Product Chemical Biology, Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, People's Republic of China.
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23
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24
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Zhang YL, Zhou XW, Wu L, Wang XB, Yang MH, Luo J, Luo JG, Kong LY. Isolation, Structure Elucidation, and Absolute Configuration of Syncarpic Acid-Conjugated Terpenoids from Rhodomyrtus tomentosa. JOURNAL OF NATURAL PRODUCTS 2017; 80:989-998. [PMID: 28245113 DOI: 10.1021/acs.jnatprod.6b01005] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Three new syncarpic acid-conjugated sesquiterpenoids, tomentodiones E-G (1-3), and six new syncarpic acid-conjugated monoterpenoids, tomentodiones H-M (4-9), were isolated from the leaves of Rhodomyrtus tomentosa. Compounds 1-3 represent the first examples of β-calacorene-based meroterpenoids. Their structures and absolute configurations were determined by a combination of NMR and ECD spectroscopy and X-ray diffraction analysis. On the basis of ECD data analysis for isolated and synthesized compounds, an empirical rule was proposed to determine the absolute configuration at C-7' of syncarpic acid-conjugated terpenoids. Additionally, a study of the reversal effect of multidrug resistance in doxorubicin-resistant human breast cancer cells showed that the noncytotoxic (+)-4 exerted the strongest potentiation effect of doxorubicin susceptibility, with an enhancement of 16.5-fold at a concentration of 30 μM.
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Affiliation(s)
- Ya-Long Zhang
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University , 24 Tong Jia Xiang, Nanjing 210009, People's Republic of China
| | - Xu-Wei Zhou
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University , 24 Tong Jia Xiang, Nanjing 210009, People's Republic of China
| | - Lin Wu
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University , 24 Tong Jia Xiang, Nanjing 210009, People's Republic of China
| | - Xiao-Bing Wang
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University , 24 Tong Jia Xiang, Nanjing 210009, People's Republic of China
| | - Ming-Hua Yang
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University , 24 Tong Jia Xiang, Nanjing 210009, People's Republic of China
| | - Jun Luo
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University , 24 Tong Jia Xiang, Nanjing 210009, People's Republic of China
| | - Jian-Guang Luo
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University , 24 Tong Jia Xiang, Nanjing 210009, People's Republic of China
| | - Ling-Yi Kong
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University , 24 Tong Jia Xiang, Nanjing 210009, People's Republic of China
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25
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Psiguajadials A-K: Unusual Psidium Meroterpenoids as Phosphodiesterase-4 Inhibitors from the Leaves of Psidium guajava. Sci Rep 2017; 7:1047. [PMID: 28432317 PMCID: PMC5430738 DOI: 10.1038/s41598-017-01028-4] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Accepted: 03/23/2017] [Indexed: 01/02/2023] Open
Abstract
Bioassay-guided fractionation of the ethanolic extract of the leaves of Psidium guajava led to the isolation of 11 new Psidium meroterpenoids, psiguajadials A–K (1–11), along with 17 known ones (12–28). Their structures and absolute configurations were elucidated by spectroscopic methods and comparison of experimental and calculated ECD. Compounds 1 and 2 represent two unprecedented skeletons of 3,5-diformyl-benzyl phloroglucinol-coupled sesquiterpenoid, while 3 is the first example of Psidium meroterpenoids coupling via an oxepane ring. Putative biosynthetic pathways towards 1 and 2 are proposed. Compounds 1–13 and 16–26 exhibited moderate inhibitory activities against phosphodiesterase-4 (PDE4), a drug target for asthma and chronic obstructive pulmonary disease, with IC50 values in the range of 1.34–7.26 μM.
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26
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Senadeera SPD, Duffy S, Avery VM, Carroll AR. Antiplasmodial β-triketones from the flowers of the Australian tree Angophora woodsiana. Bioorg Med Chem Lett 2017; 27:2602-2607. [PMID: 28400231 DOI: 10.1016/j.bmcl.2017.03.065] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Revised: 03/19/2017] [Accepted: 03/22/2017] [Indexed: 11/24/2022]
Abstract
Chemical investigations of the MeOH extract of air dried flowers of the Australian tree Angophora woodsiana (Myrtaceae) yielded two new β-triketones, woodsianones A and B (1, 2) and nine known β-triketones (3-11). Woodsianone A is a β-triketone-sesquiterpene adduct and woodsianone B is a β-triketone epoxide derivative. The structures of the new and known compounds were elucidated from the analysis of 1D/2D NMR and MS data. The relative configurations of the compounds were determined from analysis of 1H-1H coupling constants and ROESY correlations. All compounds (1-11) had antiplasmodial activity against the chloroquine sensitive strain 3D7. The known compound rhodomyrtone (5) and new compound woodsianone B (2) showed moderate antiplasmodial activities against the 3D7 strain (1.84µM and 3.00µM, respectively) and chloroquine resistant strain Dd2 (4.00µM and 2.53µM, respectively).
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Affiliation(s)
- Sarath P D Senadeera
- Environmental Futures Research Institute, Griffith University, Gold Coast, QLD 4222, Australia; Griffith School of Environment, Griifth University, Gold Coast, QLD 4222, Australia; Department of Natural Products, Medical Research Institute, No 527, Dr. Danister De Silva Mawatha, Colombo 08, Sri Lanka
| | - Sandra Duffy
- Griffith Institute for Drug Discovery, Griffith University, Brisbane, QLD 4111, Australia
| | - Vicky M Avery
- Griffith Institute for Drug Discovery, Griffith University, Brisbane, QLD 4111, Australia
| | - Anthony R Carroll
- Environmental Futures Research Institute, Griffith University, Gold Coast, QLD 4222, Australia; Griffith School of Environment, Griifth University, Gold Coast, QLD 4222, Australia; Griffith Institute for Drug Discovery, Griffith University, Brisbane, QLD 4111, Australia.
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27
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Callviminols A-E, new terpenoid-conjugated phloroglucinols from the leaves of Callistemon viminalis. Fitoterapia 2016; 115:142-147. [PMID: 27777133 DOI: 10.1016/j.fitote.2016.10.007] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Revised: 10/03/2016] [Accepted: 10/05/2016] [Indexed: 11/23/2022]
Abstract
Callviminols A-E (1-5), five rare phloroglucinols bearing a framework embodying a hexahydrodibenzo[b,d]furan or 2-phenylcyclohexanol nucleus derived from a phloroglucinol-monoterpene adduct, were isolated from the leaves of Callistemon viminalis. Their structures were established via extensive spectroscopic measurements, with the absolute configuration of 5 determined by electronic circular dichroism (ECD) calculations. The plausible biogenetic pathway suggested that a unique oxidative radical addition and classic cationic cyclization were key biosynthetic steps.
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28
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Liu HX, Chen YC, Liu Y, Zhang WM, Wu JW, Tan HB, Qiu SX. Acylphloroglucinols from the leaves of Callistemon viminalis. Fitoterapia 2016; 114:40-44. [DOI: 10.1016/j.fitote.2016.08.010] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2016] [Revised: 08/12/2016] [Accepted: 08/20/2016] [Indexed: 12/31/2022]
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29
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Zhang YL, Chen C, Wang XB, Wu L, Yang MH, Luo J, Zhang C, Sun HB, Luo JG, Kong LY. Rhodomyrtials A and B, Two Meroterpenoids with a Triketone-Sesquiterpene-Triketone Skeleton from Rhodomyrtus tomentosa: Structural Elucidation and Biomimetic Synthesis. Org Lett 2016; 18:4068-71. [PMID: 27482941 DOI: 10.1021/acs.orglett.6b01944] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Rhodomyrtials A and B (1 and 2), two unprecedented triketone-sesquiterpene-triketone adducts, along with five biogenetically related intermediates, rhodomentone A (3) and tomentodiones A-D (4-7), were isolated from the leaves of Rhodomyrtus tomentosa. Their structures and absolute configurations were determined by a combination of NMR spectroscopy, chemical conversion, and X-ray diffraction analysis. Compounds 1 and 2 were biomimetically synthesized via 5 and 4, respectively, rather than 3, revealing their key ordering of biosynthetic events and confirming their structural assignments. Compound 7 exhibited potent metastatic inhibitory activity against DLD-1 cells by suppressing the activation of matrix metalloproteinase (MMP)-2 and MMP-9.
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Affiliation(s)
- Ya-Long Zhang
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University , 24 Tong Jia Xiang, Nanjing 210009, People's Republic of China
| | - Chen Chen
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University , 24 Tong Jia Xiang, Nanjing 210009, People's Republic of China
| | - Xiao-Bing Wang
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University , 24 Tong Jia Xiang, Nanjing 210009, People's Republic of China
| | - Lin Wu
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University , 24 Tong Jia Xiang, Nanjing 210009, People's Republic of China
| | - Ming-Hua Yang
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University , 24 Tong Jia Xiang, Nanjing 210009, People's Republic of China
| | - Jun Luo
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University , 24 Tong Jia Xiang, Nanjing 210009, People's Republic of China
| | - Can Zhang
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University , 24 Tong Jia Xiang, Nanjing 210009, People's Republic of China
| | - Hong-Bin Sun
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University , 24 Tong Jia Xiang, Nanjing 210009, People's Republic of China
| | - Jian-Guang Luo
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University , 24 Tong Jia Xiang, Nanjing 210009, People's Republic of China
| | - Ling-Yi Kong
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University , 24 Tong Jia Xiang, Nanjing 210009, People's Republic of China
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Liu HX, Chen K, Yuan Y, Xu ZF, Tan HB, Qiu SX. Rhodomentones A and B, novel meroterpenoids with unique NMR characteristics from Rhodomyrtus tomentosa. Org Biomol Chem 2016; 14:7354-60. [DOI: 10.1039/c6ob01215a] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two novel meroterpenoids were isolated from Rhodomyrtus tomentosa. Their structures with unique NMR characteristics were determined by extensive spectroscopic analysis, single-crystal X-ray diffraction, quantum molecular calculation, chemical transformation as well as total synthesis.
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Affiliation(s)
- Hong-Xin Liu
- Program for Natural Products Chemical Biology
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization
- South China Botanical Garden
- Chinese Academy of Sciences
- Guangzhou 510650
| | - Kai Chen
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- China
| | - Yao Yuan
- Program for Natural Products Chemical Biology
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization
- South China Botanical Garden
- Chinese Academy of Sciences
- Guangzhou 510650
| | - Zhi-Fang Xu
- Program for Natural Products Chemical Biology
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization
- South China Botanical Garden
- Chinese Academy of Sciences
- Guangzhou 510650
| | - Hai-Bo Tan
- Program for Natural Products Chemical Biology
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization
- South China Botanical Garden
- Chinese Academy of Sciences
- Guangzhou 510650
| | - Sheng-Xiang Qiu
- Program for Natural Products Chemical Biology
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization
- South China Botanical Garden
- Chinese Academy of Sciences
- Guangzhou 510650
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