1
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Sadeghi M. The untold story of starch as a catalyst for organic reactions. RSC Adv 2024; 14:12676-12702. [PMID: 38645516 PMCID: PMC11027044 DOI: 10.1039/d4ra00775a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Accepted: 04/04/2024] [Indexed: 04/23/2024] Open
Abstract
Starch is one of the members of the polysaccharide family. This biopolymer has shown many potential applications in different fields such as catalytic reactions, water treatment, packaging, and food industries. In recent years, using starch as a catalyst has attracted much attention. From a catalytic point of view, starch can be used in organic chemistry reactions as a catalyst or catalyst support. Reports show that as a catalyst, simple starch can promote many heterocyclic compound reactions. On the other hand, functionalized starch is not only capable of advancing the synthesis of heterocycles but also is a good candidate catalyst for other reactions including oxidation and coupling reactions. This review tries to provide a fair survey of published organic reactions which include using starch as a catalyst or a part of the main catalyst. Therefore, the other types of starch applications are not the subject of this review.
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Affiliation(s)
- Masoud Sadeghi
- Department of Organic Chemistry, Faculty of Chemistry, University of Kashan P.O. Box: 87317-51167 Kashan Iran
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2
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Xia J, Si H, Huang X, Chen X, Fu X, Li G, Lai Q, Li F, Wang W, Shao Z. Metabolomics and Molecular Networking-Guided Screening of Bacillus-Derived Bioactive Compounds Against a Highly Lethal Vibrio Species. Anal Chem 2024; 96:4359-4368. [PMID: 38452345 DOI: 10.1021/acs.analchem.3c02958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2024]
Abstract
Microorganisms are important sources of bioactive natural products. However, the complexity of microbial metabolites and the low abundance of active compounds render the isolation and purification process laborious and inefficient. During our search for active substances capable of inhibiting the newly discovered highly lethal Vibrio strain vp-HL, we found that the fermentation broth of multiple Bacillus strains exhibited antibacterial activity. However, the substances responsible for the activity remained unclear. Metabolomics, molecular networking (MN), and the Structural similarity Network Annotation Platform for Mass Spectrometry (SNAP-MS) were employed in conjunction with bioactivity screening to predict the antibacterial compounds from Bacillus strains. The analysis of fractions, and their isolation, NMR-based annotation, and bioactivity evaluation of an amicoumacin compound partially confirmed the prediction from these statistical analyses. This work presents the potential of marine Bacillus in producing active substances against Vibrio species. Additionally, it highlighted the significance and feasibility of metabolomics and MN in the dereplication of compounds and the determination of isolation targets.
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Affiliation(s)
- Jinmei Xia
- Key Laboratory of Marine Biogenetic Resources, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China
- School of Advanced Manufacturing, Fuzhou University, Jinjiang 362251, China
| | - Hongkun Si
- Key Laboratory of Marine Biogenetic Resources, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China
- School of Advanced Manufacturing, Fuzhou University, Jinjiang 362251, China
| | - Xiaomei Huang
- Department of Marine Biology, Xiamen Ocean Vocational College, Xiamen 361102, China
| | - Xiangwei Chen
- Key Laboratory of Marine Biogenetic Resources, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China
| | - Xiaoteng Fu
- Key Laboratory of Marine Biogenetic Resources, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China
| | - Guangyu Li
- Key Laboratory of Marine Biogenetic Resources, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China
| | - Qiliang Lai
- Key Laboratory of Marine Biogenetic Resources, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China
| | - Fang Li
- Key Laboratory of Marine Biogenetic Resources, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China
| | - Weiyi Wang
- Key Laboratory of Marine Biogenetic Resources, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China
| | - Zongze Shao
- Key Laboratory of Marine Biogenetic Resources, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China
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3
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Yao L, Jumai A, Huang X, Lin T, Tao Z, Qiu SX. Four new isocoumarins from Cajanus cajan. RSC Adv 2024; 14:7763-7769. [PMID: 38444970 PMCID: PMC10913066 DOI: 10.1039/d3ra08149d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Accepted: 12/31/2023] [Indexed: 03/07/2024] Open
Abstract
Four novel new isocoumarins, cajanolactone B, C, D1 and D2 (1-4), were isolated from ethanolic extracts of the leaves of Cajanus cajan. The structural elucidation has been completed mainly depending on extensive spectroscopic analysis including UV, IR, NMR (1D and 2D), HRESIMS and chiral analysis. Notably, all these new isocoumarins were found to exist in racemic forms, among which compounds 3 and 4 share the same planar structure. This finding suggests that at least the biosynthesis of isocoumarin in C. cajan is chiral tolerant. A plausible biogenetic pathway of compounds 1-4 is proposed.
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Affiliation(s)
- Liyuan Yao
- State Key Laboratory of Plant Diversity and Specialty Crops & Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Program for Natural Product Chemical Biology Guangzhou 510650 China +86-20-37081190 +86-13924031914
- South China National Botanical Garden Guangzhou 510650 P. R. China
- Graduate University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Aikebaier Jumai
- State Key Laboratory of Plant Diversity and Specialty Crops & Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Program for Natural Product Chemical Biology Guangzhou 510650 China +86-20-37081190 +86-13924031914
- South China National Botanical Garden Guangzhou 510650 P. R. China
| | - Xiaobao Huang
- State Key Laboratory of Plant Diversity and Specialty Crops & Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Program for Natural Product Chemical Biology Guangzhou 510650 China +86-20-37081190 +86-13924031914
- Visiting Student from the Department of Chemistry, University of Wisconsin-Madison USA
| | - Tingting Lin
- State Key Laboratory of Plant Diversity and Specialty Crops & Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Program for Natural Product Chemical Biology Guangzhou 510650 China +86-20-37081190 +86-13924031914
| | - Zhengguo Tao
- Guangzhou Leader Biotechnology Co., LTD Guangzhou 510650 China
| | - Sheng-Xiang Qiu
- State Key Laboratory of Plant Diversity and Specialty Crops & Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Program for Natural Product Chemical Biology Guangzhou 510650 China +86-20-37081190 +86-13924031914
- South China National Botanical Garden Guangzhou 510650 P. R. China
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4
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Ayesha, Ashraf A, Arshad M, Sajid N, Rasool N, Abbas M, Nazeer U, Khalid M, Imran M. Dinuclear Zn-Catalytic System as Brønsted Base and Lewis Acid for Enantioselectivity in Same Chiral Environment. ACS OMEGA 2024; 9:6074-6092. [PMID: 38375498 PMCID: PMC10876046 DOI: 10.1021/acsomega.3c07446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 12/24/2023] [Accepted: 12/27/2023] [Indexed: 02/21/2024]
Abstract
Zinc (Zn) is a crucial element with remarkable significance in organic transformations. The profusion of harmless zinc salts in the Earth's outer layer qualifies zinc as a noteworthy contender for inexpensive and eco-friendly reagents and catalysts. Recently, widely recognized uses of organo-Zn compounds in the field of organic synthesis have undergone extensive expansion toward asymmetric transformations. The ProPhenol ligand, a member of the chiral nitrogenous-crown family, exhibits the spontaneous formation of a dual-metal complex when reacted with alkyl metal (R-M) reagents, e.g., ZnEt2. The afforded Zn complex possesses two active sites, one Lewis acid and the other Brønsted base, thereby facilitating the activation of nucleophiles and electrophiles simultaneously within the same chiral pocket. In this comprehensive analysis, we provide a thorough account of the advancement and synthetic potential of these diverse catalysts in organic synthesis, while emphasizing the reactivity and selectivities, i.e., dr and ee due to the design/structure of the ligands employed.
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Affiliation(s)
- Ayesha
- Department
of Chemistry, Government College University
Faisalabad, Faisalabad 38000, Pakistan
| | - Aisha Ashraf
- Department
of Chemistry, Government College University
Faisalabad, Faisalabad 38000, Pakistan
| | - Mahwish Arshad
- Department
of Chemistry, Government College University
Faisalabad, Faisalabad 38000, Pakistan
- Roy
and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Numan Sajid
- Department
of Chemistry, Government College University
Faisalabad, Faisalabad 38000, Pakistan
| | - Nasir Rasool
- Department
of Chemistry, Government College University
Faisalabad, Faisalabad 38000, Pakistan
| | - Mujahad Abbas
- Department
of Chemistry, Government College University
Faisalabad, Faisalabad 38000, Pakistan
| | - Usman Nazeer
- Chemistry
Department, University of Houston, 3585 Cullen Boulvard, Houston, Texas 77204-5003, United States
| | | | - Muhammad Imran
- Chemistry
Department, Faculty of Science, King Khalid
University, P.O. Box 9004, Abha 61413, Saudi Arabia
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5
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Jordão AC, Dos Santos GS, Teixeira TR, Gluzezak AJP, de Souza Azevedo CB, de Castro Pereira K, Tonani L, Gaspar LR, von Zeska Kress MR, Colepicolo P, Debonsi HM. Assessment of the photoprotective potential and structural characterization of secondary metabolites of Antarctic fungus Arthrinium sp. Arch Microbiol 2023; 206:35. [PMID: 38141073 DOI: 10.1007/s00203-023-03756-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 11/16/2023] [Accepted: 11/17/2023] [Indexed: 12/24/2023]
Abstract
Interest in Antarctic fungi has grown due to their resilience in harsh environments, suggesting the presence of valuable compounds from its organisms, such as those presenting photoprotective potential, since this environment suffers the most dangerous UV exposure in the world. Therefore, this research aimed to assess the photoprotective potential of compounds from sustainable marine sources, specifically seaweed-derived fungi from Antarctic continent. These studies led to discovery of photoprotective and antioxidant properties of metabolites from Arthrinium sp., an endophytic fungus from Antarctic brown algae Phaeurus antarcticus. From crude extract, fractions A-I were obtained and compounds 1-6 isolated from E and F fractions, namely 3-Hydroxybenzyl alcohol (1), (-)-orthosporin (2), norlichexanthone (3), anomalin B (4), anomalin A (5), and agonodepside B (6). Compounds 1, 2, and 6 were not previously reported in Arthrinium. Fraction F demonstrated excellent absorbance in both UVA and UVB regions, while compound 6 exhibited lower UVB absorbance, possibly due to synergistic effects. Fraction F and compound 6 displayed photostability and were non-phototoxic to HaCaT cells. They also exhibited antioxidant activity by reducing intracellular ROS production induced by UVA in keratinocyte monolayers and reconstructed human skin models (resulting in 34.6% and 30.2% fluorescence reduction) and did not show irritation potential in HET-CAM assay. Thus, both are promising candidates for use in sunscreens. It is noted that Fraction F does not require further purification, making it advantageous, although clinical studies are necessary to confirm its potential applicability for sunscreen formulations.
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Affiliation(s)
- Ana Carolina Jordão
- Department of Biomolecular Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Gustavo Souza Dos Santos
- Department of Biomolecular Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
- Department of Life Sciences, State University of Bahia, Salvador, BA, Brazil
| | - Thaiz Rodrigues Teixeira
- Department of Biomolecular Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
- Center for Discovery and Innovation in Parasitic Disease, Skaggs School of Pharmacy and Pharmaceutical Sciences, University California San Diego, California, CA, USA
| | - Ana Júlia Pasuch Gluzezak
- Department of Pharmaceutical Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Clarissa Bechuate de Souza Azevedo
- Department of Pharmaceutical Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Karina de Castro Pereira
- Department of Pharmaceutical Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Ludmilla Tonani
- Department of Clinical, Toxicological and Bromatological Analysis, School of Pharmaceutical Sciences, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Lorena Rigo Gaspar
- Department of Pharmaceutical Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Márcia Regina von Zeska Kress
- Department of Clinical, Toxicological and Bromatological Analysis, School of Pharmaceutical Sciences, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Pio Colepicolo
- Department of Biochemistry, Chemistry Institute, University of São Paulo, São Paulo, SP, Brazil
| | - Hosana Maria Debonsi
- Department of Biomolecular Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil.
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6
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Yu J, Liu X, Ma C, Li C, Zhang Y, Che Q, Zhang G, Zhu T, Li D. Activation of a Silent Polyketide Synthase SlPKS4 Encoding the C 7-Methylated Isocoumarin in a Marine-Derived Fungus Simplicillium lamellicola HDN13-430. Mar Drugs 2023; 21:490. [PMID: 37755103 PMCID: PMC10532586 DOI: 10.3390/md21090490] [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: 08/24/2023] [Revised: 09/06/2023] [Accepted: 09/12/2023] [Indexed: 09/28/2023] Open
Abstract
Coumarins, isocoumarins and their derivatives are polyketides abundant in fungal metabolites. Although they were first discovered over 50 years ago, the biosynthetic process is still not entirely understood. Herein, we report the activation of a silent nonreducing polyketide synthase that encodes a C7-methylated isocoumarin, similanpyrone B (1), in a marine-derived fungus Simplicillium lamellicola HDN13-430 by heterologous expression. Feeding studies revealed the host enzymes can change 1 into its hydroxylated derivatives pestapyrone A (2). Compounds 1 and 2 showed moderate radical scavenging activities with ED50 values of 67.4 µM and 104.2 µM. Our discovery fills the gap in the enzymatic elucidation of naturally occurring C7-methylated isocoumarin derivatives.
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Affiliation(s)
- Jing Yu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China; (J.Y.); (X.L.); (C.M.); (C.L.); (Q.C.); (G.Z.)
| | - Xiaolin Liu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China; (J.Y.); (X.L.); (C.M.); (C.L.); (Q.C.); (G.Z.)
| | - Chuanteng Ma
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China; (J.Y.); (X.L.); (C.M.); (C.L.); (Q.C.); (G.Z.)
| | - Chen Li
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China; (J.Y.); (X.L.); (C.M.); (C.L.); (Q.C.); (G.Z.)
| | - Yuhan Zhang
- School of Pharmaceutical Science, Shandong University, Jinan 250100, China;
| | - Qian Che
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China; (J.Y.); (X.L.); (C.M.); (C.L.); (Q.C.); (G.Z.)
| | - Guojian Zhang
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China; (J.Y.); (X.L.); (C.M.); (C.L.); (Q.C.); (G.Z.)
- Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China
| | - Tianjiao Zhu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China; (J.Y.); (X.L.); (C.M.); (C.L.); (Q.C.); (G.Z.)
| | - Dehai Li
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China; (J.Y.); (X.L.); (C.M.); (C.L.); (Q.C.); (G.Z.)
- Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China
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7
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Cheesman MJ, Alcorn SR, White A, Cock IE. Hamamelis virginiana L. Leaf Extracts Inhibit the Growth of Antibiotic-Resistant Gram-Positive and Gram-Negative Bacteria. Antibiotics (Basel) 2023; 12:1195. [PMID: 37508291 PMCID: PMC10376399 DOI: 10.3390/antibiotics12071195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 07/10/2023] [Accepted: 07/13/2023] [Indexed: 07/30/2023] Open
Abstract
Virginian witch hazel (WH; Hamamelis virginiana L.; family: Hamamelidaceae) is a North American plant that is used traditionally to treat a variety of ailments, including bacterial infections. Solvents of varying polarity (water, methanol, ethyl acetate, hexane and chloroform) were used to prepare extracts from this plant. Resuspensions of each extract in an aqueous solution were tested for growth-inhibitory activity against a panel of bacteria (including three antibiotic-resistant strains) using agar disc diffusion and broth microdilution assays. The ethyl acetate, hexane and chloroform extracts were completely ineffective. However, the water and methanolic extracts were good inhibitors of E. coli, ESBL E. coli, S. aureus, MRSA, K. pneumoniae and ESBL K. pneumoniae growth, with the methanolic extract generally displaying substantially greater potency than the other extracts. Combining the active extracts with selected conventional antibiotics potentiated the bacterial growth inhibition of some combinations, whilst other combinations remained non-interactive. No synergistic or antagonistic interactions were observed for any WH extracts/antibiotic combinations. Gas chromatography-mass spectrometry analysis of the extracts identified three molecules of interest that may contribute to the activities observed, including phthalane and two 1,3-dioxolane compounds. Putative modes of action of the active WH extracts and these molecules of interest are discussed herein.
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Affiliation(s)
- Matthew J Cheesman
- School of Pharmacy and Medical Sciences, Gold Coast Campus, Griffith University, Gold Coast 4222, Australia
| | - Sean R Alcorn
- School of Pharmacy and Medical Sciences, Gold Coast Campus, Griffith University, Gold Coast 4222, Australia
| | - Alan White
- School of Environment and Science, Nathan Campus, Griffith University, Brisbane 4111, Australia
| | - Ian E Cock
- School of Environment and Science, Nathan Campus, Griffith University, Brisbane 4111, Australia
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8
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Jiang P, Fu X, Niu H, Chen S, Liu F, Luo Y, Zhang D, Lei H. Recent advances on Pestalotiopsis genus: chemistry, biological activities, structure-activity relationship, and biosynthesis. Arch Pharm Res 2023:10.1007/s12272-023-01453-2. [PMID: 37389739 DOI: 10.1007/s12272-023-01453-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Accepted: 06/21/2023] [Indexed: 07/01/2023]
Abstract
Strains of the fungal genus Pestalotiopsis are reported as large promising sources of structurally varied biologically active metabolites. Many bioactive secondary metabolites with diverse structural features have been derived from Pestalotiopsis. Moreover, some of these compounds can potentially be developed into lead compounds. Herein, we have systematically reviewed the chemical constituents and bioactivities of the fungal genus Pestalotiopsis, covering a period ranging from January 2016 to December 2022. As many as 307 compounds, including terpenoids, coumarins, lactones, polyketides, and alkaloids, were isolated during this period. Furthermore, for the benefit of readers, the biosynthesis and potential medicinal value of these new compounds are also discussed in this review. Finally, the perspectives and directions for future research and the potential applications of the new compounds are summarized in various tables.
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Affiliation(s)
- Peng Jiang
- Key Laboratory of Tropical Marine Bioresources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
- University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing, 100049, China
| | - Xiujuan Fu
- School of Pharmacy, Southwest Medical University, Luzhou, 646000, Sichuan, China
| | - Hong Niu
- School of Pharmacy, Southwest Medical University, Luzhou, 646000, Sichuan, China
| | - Siwei Chen
- School of Pharmacy, Southwest Medical University, Luzhou, 646000, Sichuan, China
| | - Feifei Liu
- School of Life Sciences, Jiangsu Normal University, Xuzhou, 221116, Jiangsu, China
| | - Yu Luo
- School of Pharmacy, Southwest Medical University, Luzhou, 646000, Sichuan, China
| | - Dan Zhang
- School of Pharmacy, Southwest Medical University, Luzhou, 646000, Sichuan, China.
| | - Hui Lei
- School of Pharmacy, Southwest Medical University, Luzhou, 646000, Sichuan, China.
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9
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El Baraka Y, Hamdoun G, El Brahmi N, El Kazzouli S. Unlocking the Potential of Deep Eutectic Solvents for C-H Activation and Cross-Coupling Reactions: A Review. Molecules 2023; 28:4651. [PMID: 37375204 DOI: 10.3390/molecules28124651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Revised: 06/05/2023] [Accepted: 06/05/2023] [Indexed: 06/29/2023] Open
Abstract
Green chemistry principles have underpinned the development of deep eutectic solvents (DESs). In this brief overview, we discuss the potential of DESs as a greener alternative to volatile organic solvents for cross-coupling and C-H activation reactions in organic chemistry. DESs offer numerous benefits, such as easy preparation, low toxicity, high biodegradability, and the potential to replace volatile organic compounds. The ability of DESs to recover the catalyst-solvent system enhances their sustainability. This review highlights recent advances and challenges in utilizing DESs as a reaction media, as well as the impact of physicochemical properties on the reaction process. Several types of reactions are studied to highlight their effectiveness at promoting C-C bond formation. Aside from demonstrating the success of DESs in this context, this review also discusses the limitations and future prospects of DESs in organic chemistry.
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Affiliation(s)
- Yassine El Baraka
- Euromed Research Center, Euromed Faculty of Pharmacy, School of Engineering in Biomedical and Biotechnology, Euromed University of Fes (UEMF), Meknes Road, Fez 30000, Morocco
| | - Ghanem Hamdoun
- Euromed Research Center, Euromed Faculty of Pharmacy, School of Engineering in Biomedical and Biotechnology, Euromed University of Fes (UEMF), Meknes Road, Fez 30000, Morocco
| | - Nabil El Brahmi
- Euromed Research Center, Euromed Faculty of Pharmacy, School of Engineering in Biomedical and Biotechnology, Euromed University of Fes (UEMF), Meknes Road, Fez 30000, Morocco
| | - Saïd El Kazzouli
- Euromed Research Center, Euromed Faculty of Pharmacy, School of Engineering in Biomedical and Biotechnology, Euromed University of Fes (UEMF), Meknes Road, Fez 30000, Morocco
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10
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Ano Y, Takahashi S, Chatani N. Palladium-Catalyzed 1,1-Alkynyloxygenation of 2-Vinylbenzoates with Alkynyl Bromides. Org Lett 2023; 25:3266-3270. [PMID: 37133260 DOI: 10.1021/acs.orglett.3c01008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
The palladium-catalyzed reaction of alkyl 2-vinylbenzoates with silyl-protected alkynyl bromides leads to the selective production of 3-alkynylated isochroman-1-ones. The use of an alkyl ester group as an effective oxygen nucleophile is crucial for the efficient 1,1-alkynyloxygenation of alkenes.
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Affiliation(s)
- Yusuke Ano
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
- Center for Atomic and Molecular Technologies, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Sakura Takahashi
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Naoto Chatani
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
- Research Center for Environmental Preservation, Osaka University, 2-4 Yamadaoka, Suita, Osaka 565-0871, Japan
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11
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Petcu AS, Lázaro-Milla C, Rodríguez FJ, Iriepa I, Bautista-Aguilera ÓM, Aragoncillo C, Alonso JM, Almendros P. Straightforward Synthesis of Bis[(trifluoromethyl)sulfonyl]ethylated Isocoumarins from 2-Ethynylbenzoates. J Org Chem 2023. [PMID: 37133251 DOI: 10.1021/acs.joc.3c00611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Herein, we report a facile isocoumarin and isoquinolone preparation by taking advantage of an initial bis(triflyl)ethylation [triflyl = (trifluoromethyl)sulfonyl] reaction, followed by heterocyclization, which contrasts with our previous results on cyclobutene formation. The efficiency of the catalyst- and irradiation-free heterocyclization/bis(triflyl)ethylation sequence showed exquisite dependence on the electronic nature of the substituents at the 2-ethynylbenzoate(benzamide) precursors. Molecular docking of model bis(triflyl)ethylated isocoumarins on human acetylcholinesterase (hAChE) revealed promising biological activities through selective coordination on both the catalytic active site and peripheral active site.
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Affiliation(s)
- A Sonia Petcu
- Instituto de Química Orgánica General, IQOG, CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
| | - Carlos Lázaro-Milla
- Grupo de Lactamas y Heterociclos Bioactivos, Departamento de Química Orgánica, Unidad Asociada al CSIC, Facultad de Química, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - F Javier Rodríguez
- Grupo de Lactamas y Heterociclos Bioactivos, Departamento de Química Orgánica, Unidad Asociada al CSIC, Facultad de Química, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Isabel Iriepa
- Universidad de Alcalá, Departamento de Química Orgánica y Química Inorgánica, 28805 Alcalá de Henares, Madrid, Spain
- Instituto de Investigación Química Andrés M. del Río (IQAR), Universidad de Alcalá, 28805 Alcalá de Henares, Madrid, Spain
| | - Óscar M Bautista-Aguilera
- Universidad de Alcalá, Departamento de Química Orgánica y Química Inorgánica, 28805 Alcalá de Henares, Madrid, Spain
- Instituto de Investigación Química Andrés M. del Río (IQAR), Universidad de Alcalá, 28805 Alcalá de Henares, Madrid, Spain
| | - Cristina Aragoncillo
- Grupo de Lactamas y Heterociclos Bioactivos, Departamento de Química Orgánica, Unidad Asociada al CSIC, Facultad de Química, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - José M Alonso
- Grupo de Lactamas y Heterociclos Bioactivos, Departamento de Química Orgánica, Unidad Asociada al CSIC, Facultad de Química, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Pedro Almendros
- Instituto de Química Orgánica General, IQOG, CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
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12
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Kong GH, Gu XJ, Wu J, Zheng JN, Huang DQ, Zhang GH, Bao MF, Hu QF, Wu YP, Li YK. Antiviral Isocoumarins from a Cigar Tobacco-Derived Endophytic Fungus Aspergillus oryzae. Chem Nat Compd 2023. [DOI: 10.1007/s10600-023-03966-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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13
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Liu HY, Yang FX, Dai JM, Liang MJ, Xiong W, Mi QL, Li XM, Wang K, Deng L, Hu Q, Zhang JD. Isochromenes from the Nicotiana tabacum-Derived Endophytic Fungus Aspergillus versicolor and Their Bioactivities. Chem Nat Compd 2023. [DOI: 10.1007/s10600-023-03913-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2023]
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14
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Tammam MA, Gamal El-Din MI, Abood A, El-Demerdash A. Recent advances in the discovery, biosynthesis, and therapeutic potential of isocoumarins derived from fungi: a comprehensive update. RSC Adv 2023; 13:8049-8089. [PMID: 36909763 PMCID: PMC9999372 DOI: 10.1039/d2ra08245d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Accepted: 02/26/2023] [Indexed: 03/12/2023] Open
Abstract
Microorganisms still remain the main hotspots in the global drug discovery avenue. In particular, fungi are highly prolific producers of vast structurally diverse specialized secondary metabolites, which have displayed a myriad of biomedical potentials. Intriguingly, isocoumarins is one distinctive class of fungal natural products polyketides, which demonstrated numerous remarkable biological and pharmacological activities. This review article provides a comprehensive state-of-the-art over the period 2000-2022 about the discovery, isolation, classifications, and therapeutic potentials of isocoumarins exclusively reported from fungi. Indeed, a comprehensive list of 351 structurally diverse isocoumarins were documented and classified according to their fungal sources [16 order/28 family/55 genera] where they have been originally discovered along with their reported pharmacological activities wherever applicable. Also, recent insights around their proposed and experimentally proven biosynthetic pathways are also briefly discussed.
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Affiliation(s)
- Mohamed A Tammam
- Department of Biochemistry, Faculty of Agriculture, Fayoum University Fayoum 63514 Egypt
| | - Mariam I Gamal El-Din
- Department of Pharmacognosy, Faculty of Pharmacy, Ain-Shams University Cairo 11566 Egypt
| | - Amira Abood
- Chemistry of Natural and Microbial Products Department, National Research Center Dokki Cairo Egypt
- School of Bioscience, University of Kent Canterbury UK
| | - Amr El-Demerdash
- Organic Chemistry Division, Department of Chemistry, Faculty of Sciences, Mansoura University Mansoura 35516 Egypt
- Department of Biochemistry and Metabolism, John Innes Centre Norwich Research Park Norwich NR4 7UH UK
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15
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Chutia K, Sarmah M, Gogoi P. Substituted Isocoumarins: An Assemble of Synthetic Strategies Towards 3-Substituted and 3,4-Disubstituted Isocoumarins. Chem Asian J 2023; 18:e202201240. [PMID: 36647281 DOI: 10.1002/asia.202201240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 01/13/2023] [Accepted: 01/16/2023] [Indexed: 01/18/2023]
Abstract
The versatility of isocoumarin frameworks offers the privilege to access many pharmacological targets. This unique heterocycle core present in many natural products and complex organic molecules contribute to medicinal chemistry as anti-cancer, anti-inflammatory and immunomodulatory agents. The attractive properties exhibited by its analogues urged the scientists to explore their synthetic analogues. In regard to the myriads of synthetic methodologies, we have compiled a review update covering all the articles that have been published towards the synthesis of 3-substituted and 3,4-disubstituted isocoumarins. Additionally, we have also highlighted a systematic survey of catalytic methods for their synthesis along with their scope towards diverse functionalizations and plausible mechanistic aspects.
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Affiliation(s)
- Kangkana Chutia
- Applied Organic Chemistry Group, Chemical Science and Technology Division CSIR-North East Institute of Science and Technology, NH 37, Pulibor, Jorhat, Assam, 785006, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, U.P., 201002, India
| | - Manashi Sarmah
- Applied Organic Chemistry Group, Chemical Science and Technology Division CSIR-North East Institute of Science and Technology, NH 37, Pulibor, Jorhat, Assam, 785006, India
| | - Pranjal Gogoi
- Applied Organic Chemistry Group, Chemical Science and Technology Division CSIR-North East Institute of Science and Technology, NH 37, Pulibor, Jorhat, Assam, 785006, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, U.P., 201002, India
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16
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Salvatore MM, DellaGreca M, Nicoletti R, Salvatore F, Tuzi A, De Tommaso G, Alves A, Mahamedi AE, Berraf-Tebbal A, Andolfi A. Mitidjospirone, a new spirodioxynaphthalene and GC-MS screening of secondary metabolites produced by strains of Lasiodiplodia mitidjana associated to Citrus sinensis dieback. Nat Prod Res 2023; 37:424-433. [PMID: 34514928 DOI: 10.1080/14786419.2021.1977299] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Mitidjospirone, a new spiridioxynaphthalene, was isolated from the mycelial extract of a strain of Lasiodiplodia mitidjana, a recently described species belonging to the family Botryosphaeriaceae. Its structure was elucidated by extensive spectroscopic analysis and the absolute configuration was determined by electronic circular dichroism (ECD) experiment. Furthermore, several known compounds were identified during the screening of secondary metabolites produced by four strains of L. mitidjana.
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Affiliation(s)
| | - Marina DellaGreca
- Department of Chemical Sciences, University of Naples Federico II, Naples, Italy
| | - Rosario Nicoletti
- Council for Agricultural Research and Economics, Research Centre for Olive, Fruit and Citrus Crops, Caserta, Italy.,Department of Agricultural Sciences, University of Naples Federico II, Portici, Italy
| | - Francesco Salvatore
- Department of Chemical Sciences, University of Naples Federico II, Naples, Italy
| | - Angela Tuzi
- Department of Chemical Sciences, University of Naples Federico II, Naples, Italy
| | - Gaetano De Tommaso
- Department of Chemical Sciences, University of Naples Federico II, Naples, Italy
| | - Artur Alves
- CESAM Centre for Environmental and Marine Studies, Department of Biology, University of Aveiro, Aveiro, Portugal
| | - Alla Eddine Mahamedi
- Département de Biologie, Faculté des Sciences de la Nature et de la Vie et Sciences de la Terre, Université de Ghardaïa, Ghardaïa, Algeria
| | - Akila Berraf-Tebbal
- Mendeleum-Institute of Genetics, Faculty of Horticulture, Mendel University in Brno, Lednice, Czech Republic
| | - Anna Andolfi
- Department of Chemical Sciences, University of Naples Federico II, Naples, Italy.,BAT Center-Interuniversity Center for Studies on Bioinspired Agro-Environmental Technology, University of Naples Federico II, Portici, NA, Italy
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17
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Salvatore MM, Carraturo F, Salbitani G, Rosati L, De Risi A, Andolfi A, Salvatore F, Guida M, Carfagna S. Biological and metabolic effects of the association between the microalga Galdieria sulphuraria and the fungus Penicillium citrinum. Sci Rep 2023; 13:1789. [PMID: 36720953 PMCID: PMC9889788 DOI: 10.1038/s41598-023-27827-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Accepted: 01/09/2023] [Indexed: 02/02/2023] Open
Abstract
Contamination of microalgae cultures can reduce their productivity and affect the quality of biomass and valuable bioproducts. In this article, after having isolated and identified for the first time the filamentous fungus Penicillium citrinum from heterotrophic cultures of the red polyextremophilic microalga Galdieria sulphuraria, we investigated the biological and metabolic significance of this alga-fungus association. In the same medium, both organisms grow better in each other's presence than separately. Both cell density and cell size of G. sulphuraria increase in co-cultures compared to pure alga cultures. In co-cultures, despite very severe growth conditions, the load of P. citrinum increases compared to pure fungus cultures. Optical microscope images have shown physical contact between cells of P. citrinum hyphae and G. sulphuraria which, however, retain their morphology and cell wall intact. GC-MS-based metabolomics analysis of metabolites excreted in the culture medium shows that pure cultures of the fungus and alga and co-cultures of alga plus fungus can be easily differentiated based on their metabolic products. Indeed, a richer assortment of extracellular metabolites (comprising both products of primary and secondary metabolism) is a distinct feature of co-cultures compared to both pure alga and pure fungus cultures.
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Affiliation(s)
- Maria Michela Salvatore
- Department of Chemical Sciences, University of Naples Federico II, Naples, Italy.,Institute for Sustainable Plant Protection, National Research Council, Portici, NA, Italy
| | - Federica Carraturo
- Department of Biology, University of Naples Federico II, Naples, Italy. .,Hygiene Laboratory, Centro Servizi Metrologici e Tecnologici Avanzati (CeSMA), University of Naples Federico II, Corso Nicolangelo Protopisani, 80146, Napoli, NA, Italy.
| | | | - Luigi Rosati
- Department of Biology, University of Naples Federico II, Naples, Italy
| | - Arianna De Risi
- Department of Biology, University of Naples Federico II, Naples, Italy
| | - Anna Andolfi
- Department of Chemical Sciences, University of Naples Federico II, Naples, Italy.,BAT Center - Interuniversity Center for Studies on Bioinspired Agro-Environmental Technology, University of Naples Federico II, Portici, NA, Italy
| | - Francesco Salvatore
- Department of Chemical Sciences, University of Naples Federico II, Naples, Italy.,Department of Biology, University of Naples Federico II, Naples, Italy
| | - Marco Guida
- Department of Biology, University of Naples Federico II, Naples, Italy.,Hygiene Laboratory, Centro Servizi Metrologici e Tecnologici Avanzati (CeSMA), University of Naples Federico II, Corso Nicolangelo Protopisani, 80146, Napoli, NA, Italy
| | - Simona Carfagna
- Department of Biology, University of Naples Federico II, Naples, Italy
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18
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Iqbal S, Begum F, Rabaan AA, Aljeldah M, Al Shammari BR, Alawfi A, Alshengeti A, Sulaiman T, Khan A. Classification and Multifaceted Potential of Secondary Metabolites Produced by Bacillus subtilis Group: A Comprehensive Review. Molecules 2023; 28:molecules28030927. [PMID: 36770594 PMCID: PMC9919246 DOI: 10.3390/molecules28030927] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 12/31/2022] [Accepted: 01/04/2023] [Indexed: 01/19/2023] Open
Abstract
Despite their remarkable biosynthetic potential, Bacillus subtilis have been widely overlooked. However, their capability to withstand harsh conditions (extreme temperature, Ultraviolet (UV) and γ-radiation, and dehydration) and the promiscuous metabolites they synthesize have created increased commercial interest in them as a therapeutic agent, a food preservative, and a plant-pathogen control agent. Nevertheless, the commercial-scale availability of these metabolites is constrained due to challenges in their accessibility via synthesis and low fermentation yields. In the context of this rising in interest, we comprehensively visualized the antimicrobial peptides produced by B. subtilis and highlighted their prospective applications in various industries. Moreover, we proposed and classified these metabolites produced by the B. subtilis group based on their biosynthetic pathways and chemical structures. The biosynthetic pathway, bioactivity, and chemical structure are discussed in detail for each class. We believe that this review will spark a renewed interest in the often disregarded B. subtilis and its remarkable biosynthetic capabilities.
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Affiliation(s)
- Sajid Iqbal
- Atta-ur-Rahman School of Applied Biosciences, National University of Sciences and Technology (NUST), Islamabad 44000, Pakistan
- Correspondence: or
| | - Farida Begum
- Department of Biochemistry, Abdul Wali Khan University Mardan (AWKUM), Mardan 23200, Pakistan
| | - Ali A. Rabaan
- Molecular Diagnostic Laboratory, Johns Hopkins Aramco Healthcare, Dhahran 31311, Saudi Arabia
- College of Medicine, Alfaisal University, Riyadh 11533, Saudi Arabia
- Department of Public Health and Nutrition, The University of Haripur, Haripur 22610, Pakistan
| | - Mohammed Aljeldah
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, University of Hafr Al Batin, Hafr Al Batin 39831, Saudi Arabia
| | - Basim R. Al Shammari
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, University of Hafr Al Batin, Hafr Al Batin 39831, Saudi Arabia
| | - Abdulsalam Alawfi
- Department of Pediatrics, College of Medicine, Taibah University, Al-Madinah 41491, Saudi Arabia
| | - Amer Alshengeti
- Department of Pediatrics, College of Medicine, Taibah University, Al-Madinah 41491, Saudi Arabia
- Department of Infection Prevention and Control, Prince Mohammad Bin Abdulaziz Hospital, National Guard Health Affairs, Al-Madinah 41491, Saudi Arabia
| | - Tarek Sulaiman
- Infectious Diseases Section, Medical Specialties Department, King Fahad Medical City, Riyadh 12231, Saudi Arabia
| | - Alam Khan
- Department of Life Sciences, Abasyn University Islamabad Campus, Islamabad 44000, Pakistan
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19
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Bacaicoa S, Goossens E, Sundén H. Aerobic Oxidative N-Heterocyclic Carbene-Catalyzed Formal [3+3] Cyclization for the Synthesis of Tetrasubstituted Benzene Derivatives. Org Lett 2022; 24:9146-9150. [DOI: 10.1021/acs.orglett.2c03879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Sara Bacaicoa
- Department of Chemistry and Molecular Biology, University of Gothenburg, Kemivägen 10, 412 96 Göteborg, Sweden
| | - Ellymay Goossens
- Department of Chemistry and Molecular Biology, University of Gothenburg, Kemivägen 10, 412 96 Göteborg, Sweden
| | - Henrik Sundén
- Department of Chemistry and Molecular Biology, University of Gothenburg, Kemivägen 10, 412 96 Göteborg, Sweden
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20
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Aloia A, Casiello M, D'Accolti L, Fusco C, Nacci A, Monopoli A. Direct Synthesis of 3-Aryl Substituted Isocoumarins and Phthalides through Palladium Acetate Catalyzed C(sp 2 )-H Activation in Ionic Liquids. Chemistry 2022; 28:e202202350. [PMID: 35997238 PMCID: PMC9826210 DOI: 10.1002/chem.202202350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Indexed: 01/11/2023]
Abstract
A novel Pd-catalysed oxidative coupling between benzoic acids and vinylarenes or acrylates to furnish isocoumarins and phthalides is reported. The reaction proceeds smoothly in molten tetrabutylammonium acetate via a selective C-H bond activation, with very low percentage of ligand-free palladium acetate as the catalyst, under atmospheric pressure of oxygen. Sub-stoichiometric amount of copper acetate is also required as a reoxidant for the palladium.
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Affiliation(s)
- Andrea Aloia
- Chemistry DepartmentUniversità degli Studi di Bari Aldo MoroVia Orabona 470126BariItaly
| | - Michele Casiello
- Chemistry DepartmentUniversità degli Studi di Bari Aldo MoroVia Orabona 470126BariItaly
| | - Lucia D'Accolti
- Chemistry DepartmentUniversità degli Studi di Bari Aldo MoroVia Orabona 470126BariItaly,CNR – Istituto di Chimica dei Composti Organometallici (ICCOM) Bari SectionConsiglio Nazionale delle RicercheVia Orabona 470126BariItaly
| | - Caterina Fusco
- CNR – Istituto di Chimica dei Composti Organometallici (ICCOM) Bari SectionConsiglio Nazionale delle RicercheVia Orabona 470126BariItaly
| | - Angelo Nacci
- Chemistry DepartmentUniversità degli Studi di Bari Aldo MoroVia Orabona 470126BariItaly,CNR – Istituto di Chimica dei Composti Organometallici (ICCOM) Bari SectionConsiglio Nazionale delle RicercheVia Orabona 470126BariItaly
| | - Antonio Monopoli
- Chemistry DepartmentUniversità degli Studi di Bari Aldo MoroVia Orabona 470126BariItaly,CNR – Istituto di Chimica dei Composti Organometallici (ICCOM) Bari SectionConsiglio Nazionale delle RicercheVia Orabona 470126BariItaly
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21
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McCord JP, Kohanov ZA, Lowell AN. Thermorubin Biosynthesis Initiated by a Salicylate Synthase Suggests an Unusual Conversion of Phenols to Pyrones. ACS Chem Biol 2022; 17:3169-3177. [PMID: 36255735 DOI: 10.1021/acschembio.2c00606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Thermorubin is a tetracyclic naphthoisocoumarin natural product that demands investigation due to its novel mechanism of bacterial protein synthesis inhibition and its unusual structural features. In this work, we describe the identification of the biosynthetic cluster responsible for thermorubin from the sequenced Laceyella sacchari producer species and its confirmation via heterologous production in Escherichia coli. Based on an in-depth annotation of the cluster, we propose a biosynthetic pathway that accounts for the formation of the unique, nonterminal pyrone. Additionally, the expression and use of salicylate synthase TheO enabled testing of the stability properties of this extremophile-derived enzyme. TheO displayed rapid kinetics and a remarkably robust secondary structure, converting chorismate to salicylate with a KM of 109 ± 12 μM, kcat of 9.17 ± 0.36 min-1, and catalytic efficiency (kcat/KM) of 84 ± 9 nM-1 min-1, and retained significant activity up to 50 °C. These studies serve as the basis for continued biosynthetic investigations and bioinspired synthetic approaches.
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Affiliation(s)
- Jennifer P McCord
- Department of Chemistry, Virginia Tech (Virginia Polytechnic Institute and State University), Davidson Hall Rm. 480, 1040 Drillfield Dr., Blacksburg, Virginia 24061, United States
| | - Zachary A Kohanov
- Department of Chemistry, Virginia Tech (Virginia Polytechnic Institute and State University), Davidson Hall Rm. 480, 1040 Drillfield Dr., Blacksburg, Virginia 24061, United States
| | - Andrew N Lowell
- Department of Chemistry, Virginia Tech (Virginia Polytechnic Institute and State University), Davidson Hall Rm. 480, 1040 Drillfield Dr., Blacksburg, Virginia 24061, United States
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22
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Design, development and applications of copper-catalyzed regioselective (4 + 2) annulations between diaryliodonium salts and alkynes. Commun Chem 2022; 5:145. [PMID: 36697744 PMCID: PMC9814649 DOI: 10.1038/s42004-022-00768-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Accepted: 10/27/2022] [Indexed: 11/10/2022] Open
Abstract
Diaryliodonium salts have been extensively applied in organic synthesis as aryl cation equivalents. However, in the electrophilic reactions with alkenes or alkynes, only the electrophilic carbon of the diaryliodonium salts was involved while the other part of the aryl ring was not utilized. Herein, a reaction pattern of diaryliodonium was reported as oxa-1,4-dipoles to undergo (4 + 2) cycloaddition reactions with alkynes. Broad spectrum of the two reaction partners could be utilized in this protocol, enabling an operationally simple, high yielding, and regioselective synthetic approach to isocoumarins. Particularly, good to excellent regioselectivities were achieved for the sterically unbiased unsymmetrical diaryl acetylenes, which was challenging for other transition metal-catalyzed processes. The reaction could be scaled up with the ideal 1:1 stoichiometry and the isocoumarin type natural products Oospolactone and Thunberginol A could be obtained in one or three steps through this methodology.
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23
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Synthesis of heterocycles by utilizing phthalaldehydic acid: An overview. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.133073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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24
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Silva DPD, Cardoso MS, Macedo AJ. Endophytic Fungi as a Source of Antibacterial Compounds-A Focus on Gram-Negative Bacteria. Antibiotics (Basel) 2022; 11:1509. [PMID: 36358164 PMCID: PMC9687006 DOI: 10.3390/antibiotics11111509] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 10/24/2022] [Accepted: 10/26/2022] [Indexed: 07/30/2023] Open
Abstract
Bacterial resistance has become one of the main motives in the worldwide race for undescribed antibacterial agents. The difficulties in the treatment of bacterial infections are a public health issue that increasingly highlights the need for antimicrobial agents. Endophytic microorganisms are a promising alternative in the search for drugs, due to the vast number of metabolites produced with unique characteristics and bioactive potential. This review highlights the importance of endophytic microorganisms as a source of secondary metabolites in the search for active molecules against bacteria of medical importance, with a special focus on gram-negative species. This fact is supported by the findings raised in this review, which brings an arsenal of 166 molecules with characterized chemical structures and their antibacterial activities. In addition, the low cost, ease of maintenance, and optimization-controlled fermentation conditions favor reproducibility in commercial scale. Given their importance, it is necessary to intensify the search for new molecules from endophytic microorganisms, and to increasingly invest in this very promising font.
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25
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Wu W, Wu X, Fan S, Zhu J. Rh(III)-Catalyzed Enaminone-Directed C-H Coupling with Diazodicarbonyls for Skeleton-Divergent Synthesis of Isocoumarins and Naphthalenes. Org Lett 2022; 24:7850-7855. [PMID: 36260610 DOI: 10.1021/acs.orglett.2c03288] [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
Diversity-oriented synthesis is tremendously useful for expanding the explorable chemical space but restricted by the limited available toolbox of skeleton-diversification chemistry. We report herein Rh(III)-catalyzed coupling of enaminones and diazodicarbonyls for skeleton-divergent synthesis of isocoumarins and naphthalenes. The diazodicarbonyl ring size and pH dependence of the skeleton-forming process demonstrates the achievement of both substrate- and reagent-controlled skeletal diversity generation in a single type of system. An intriguing C-C bond cleavage reactivity is critical for enabling facile synthetic access to isocoumarins.
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Affiliation(s)
- Weiping Wu
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210023, China
| | - Xuan Wu
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210023, China
| | - Shuaixin Fan
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210023, China
| | - Jin Zhu
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210023, China
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26
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Qin W, Liu Y, Yan H. Enantioselective Synthesis of Atropisomers via Vinylidene ortho-Quinone Methides (VQMs). Acc Chem Res 2022; 55:2780-2795. [PMID: 36121104 DOI: 10.1021/acs.accounts.2c00486] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Atropisomers, arising from conformational restriction, are inherently chiral due to the intersecting dissymmetric planes. Since there are numerous applications of enantiopure atropisomers in catalyst design, drug discovery, and material science, the asymmetric preparation of these highly prized molecules has become a flourishing field in synthetic chemistry. A number of catalysts, synthetic procedures, and novel concepts have been developed for the manufacture of the atropisomeric molecules. However, due to the intrinsic properties of different types of atropisomers featuring biaryl, hetero-biaryl, or non-biaryl architectures, only very few methods pass the rigorous inspection and are considered generally applicable. The development of a broadly applicable synthetic strategy for various atropisomers is a challenge. In this Account, we summarize our recent studies on the enantioselective synthesis of atropisomers using the vinylidene ortho-quinone methides (VQMs) as pluripotent intermediates.The most appealing features of VQMs are the disturbed aromaticity and axial chirality of the allene fragment. At the outset, the applications of VQMs in organic synthesis have been neglected due to their principal liabilities: ephemeral nature, extraordinary reactivity, and multireaction sites. The domestication of this transient intermediate was demonstrated by in situ catalytic asymmetric generation of VQMs, and the reactivity and selectivity were fully explored by judiciously modifying precursors and tuning catalytic systems. A variety of axially chiral heterocycles were achieved through five-, six-, seven- and nine-membered ring formation of VQM intermediates with different kinds of branched nucleophilic functional groups. The axially chiral C-N axis could be constructed from VQM intermediates via N-annulation or desymmetrization of preformed C-N scaffolds. We take advantage of the high electrophilicity of VQMs toward a series of sulfur and carbon based nucleophiles leading to atropisomeric vinyl arenes. Furthermore, chiral helical compounds were realized by cycloaddition or consecutive annulation of VQM intermediates. These achievements demonstrated that the VQMs could work as a nuclear parent for the collective synthesis of distinct and complex optically active atropisomers. Recently, we have realized the isolation and structural characterization of the elusive VQMs, which were questioned as putative intermediates for decades. The successful isolation of VQMs provided direct evidence for their existence and an unprecedented opportunity to directly investigate their reactivity. The good thermal stability and reserved reactivity of the isolated VQMs demonstrated their great potential as synthetic reagents and expanded the border of VQM chemistry.
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Affiliation(s)
- Wenling Qin
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Chemical Biology Research Center, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, P. R. China
| | - Yidong Liu
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Chemical Biology Research Center, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, P. R. China
| | - Hailong Yan
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Chemical Biology Research Center, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, P. R. China
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27
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Aidhen IS, Srikanth S, Lal H. The Emerging Promise with O/C‐Glycosides of Important Dietary Phenolic Compounds. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Indrapal Singh Aidhen
- Indian Institute of Technology Madras Department of Chemistry Adyar 600036 Chennai INDIA
| | | | - Heera Lal
- Indian Institute of Technology Madras Chemistry 600036 Chennai INDIA
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28
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Pati BV, Banjare SK, Das Adhikari GK, Nanda T, Ravikumar PC. Rhodium-Catalyzed Selective C( sp2)-H Activation/Annulation of tert-Butyl Benzoyloxycarbamates with 1,3-Diynes: A One Step Access to Alkynylated Isocoumarins and Bis-Isocoumarins. Org Lett 2022; 24:5651-5656. [PMID: 35920685 DOI: 10.1021/acs.orglett.2c01901] [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
We report here a Rh(III) catalyzed regio- and stereoselective synthesis of alkynylated and bis-isocoumarin from 1,3-dialkyne. Exclusive one-pot formation of 3,3-bis-isocoumarin isomers has been achieved by eliminating several other possibilities. This is the first example of transition metal catalyzed synthesis of alkynylated and bis-isocoumarin scaffolds. The protocol is compatible with a wide range of functional groups affording good to excellent yields. Several mechanistic investigations, including deuterium labeling experiments and kinetic isotope effect studies, have been carried out.
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Affiliation(s)
- Bedadyuti Vedvyas Pati
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, Odisha 752050, India.,Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
| | - Shyam Kumar Banjare
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, Odisha 752050, India.,Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
| | - Gopal Krushna Das Adhikari
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, Odisha 752050, India.,Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
| | - Tanmayee Nanda
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, Odisha 752050, India.,Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
| | - Ponneri C Ravikumar
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, Odisha 752050, India.,Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
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29
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Alvi S, Jayant V, Ali R. Applications of Oxone® in Organic Synthesis: An Emerging Green Reagent of Modern Era. ChemistrySelect 2022. [DOI: 10.1002/slct.202200704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Shakeel Alvi
- Department of Chemistry, Jamia Millia Islamia, Jamia Nagar, Okhla New Delhi 110025 India
| | - Vikrant Jayant
- Department of Chemistry, Jamia Millia Islamia, Jamia Nagar, Okhla New Delhi 110025 India
| | - Rashid Ali
- Department of Chemistry, Jamia Millia Islamia, Jamia Nagar, Okhla New Delhi 110025 India
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30
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Guglielmi P, Carradori S, D'Agostino I, Campestre C, Petzer JP. An updated patent review on monoamine oxidase (MAO) inhibitors. Expert Opin Ther Pat 2022; 32:849-883. [PMID: 35638744 DOI: 10.1080/13543776.2022.2083501] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
INTRODUCTION : Monoamine oxidase (MAO) inhibitors are currently used as antidepressants (selective MAO-A inhibitors) or as co-adjuvants for neurodegenerative diseases (selective MAO-B inhibitors). The research within this field is attracting attention due to their crucial role in the modulation of brain functions, mood and cognitive activity, and monoamine catabolism. AREAS COVERED MAO inhibitors (2018-2021) are discussed according to their chemotypes. Structure-activity relationships are derived for each chemical scaffold (propargylamines, chalcones, indoles, benzimidazoles, (iso)coumarins, (iso)benzofurans, xanthones, and tetralones), while the chemical entities were divided into newly synthesized molecules and natural metabolites. The mechanism of action and type of inhibition are also considered. Lastly, new therapeutic applications are reported, which demonstrates the clinical potential of these inhibitors as well as the possibility of repurposing existing drugs for a variety of diseases. EXPERT OPINION MAO inhibitors here reported exhibit different potencies (from the micro- to nanomolar range) and isoform selectivity. These compounds are clinically licensed for multi-faceted neurodegenerative pathologies due to their ability to also act against other relevant targets (cholinesterases, inflammation, and oxidative stress). Moreover, the drug repurposing approach is an attractive strategy by which MAO inhibitors may be applied for the treatment of prostate cancer, inflammation, vertigo, and type 1 diabetes.
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Affiliation(s)
- Paolo Guglielmi
- Department of Drug Chemistry and Technologies, Sapienza University of Rome, Rome, Italy
| | - Simone Carradori
- Department of Pharmacy, "G. d'Annunzio" University of Chieti-Pescara, Chieti, Italy
| | - Ilaria D'Agostino
- Department of Pharmacy, "G. d'Annunzio" University of Chieti-Pescara, Chieti, Italy
| | - Cristina Campestre
- Department of Pharmacy, "G. d'Annunzio" University of Chieti-Pescara, Chieti, Italy
| | - Jacobus P Petzer
- Pharmaceutical Chemistry and Centre of Excellence for Pharmaceutical Sciences, North-West University, Potchefstroom, South Africa
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31
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Talaromarins A–F: Six New Isocoumarins from Mangrove-Derived Fungus Talaromyces flavus TGGP35. Mar Drugs 2022; 20:md20060361. [PMID: 35736164 PMCID: PMC9229493 DOI: 10.3390/md20060361] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Revised: 05/24/2022] [Accepted: 05/24/2022] [Indexed: 12/11/2022] Open
Abstract
Six new isocoumarin derivative talaromarins A-F (1–6), along with 17 known analogues (7–23), were isolated from the mangrove-derived fungus Talaromyces flavus (Eurotiales: Trichocomaceae) TGGP35. Their structures were identified by detailed IR, UV, 1D/2D NMR and HR-ESI-MS spectra. The absolute configurations of new compounds were determined by the modified Mosher’s method and a comparison of their CD spectra with dihydroisocoumarins described in the literature. The antioxidant, antibacterial, anti-phytopathogenic and inhibitory activity against α-glucosidase of all the isolated compounds were tested. Compounds 6–11, 17–19 and 21–22 showed similar or better antioxidant activity than the IC50 values ranging from 0.009 to 0.27 mM, compared with the positive control trolox (IC50 = 0.29 mM). Compounds 10, 18, 21 and 23 exhibited strong inhibitory activities against α-glucosidase with IC50 values ranging from 0.10 to 0.62 mM, while the positive control acarbose had an IC50 value of 0.5 mM. All compounds showed no antibacterial or anti-phytopathogenic activity at the concentrations of 50 μg/mL and 1 mg/mL, respectively. These results indicated that isocoumarins will be useful to developing antioxidants and as diabetes control agents.
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32
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KURT A, KOCA M. Optoelectronic Parameters of 2-oxo-2-(1-oxo-1H-isochromen-3-yl)ethyl methacrylate Compound Thin Film. JOURNAL OF THE TURKISH CHEMICAL SOCIETY, SECTION A: CHEMISTRY 2022. [DOI: 10.18596/jotcsa.1028320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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33
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Wright AJ, McMartin FJ, Dyer LG, Sayer LH, Bulman Page PC, Stephenson GR. Planar Chiral Pseudo‐Isocoumarins by Copper Catalysed Desymmetrisation. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202100841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Adam J. Wright
- School of Chemistry University of East Anglia Norwich Research Park Norwich NR4 7TJ UK
| | - Fiona J. McMartin
- School of Chemistry University of East Anglia Norwich Research Park Norwich NR4 7TJ UK
| | - Liam G. Dyer
- School of Chemistry University of East Anglia Norwich Research Park Norwich NR4 7TJ UK
| | - Lloyd H. Sayer
- School of Chemistry University of East Anglia Norwich Research Park Norwich NR4 7TJ UK
| | - Philip C. Bulman Page
- School of Chemistry University of East Anglia Norwich Research Park Norwich NR4 7TJ UK
| | - G. Richard Stephenson
- School of Chemistry University of East Anglia Norwich Research Park Norwich NR4 7TJ UK
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Salvatore MM, Di Lelio I, DellaGreca M, Nicoletti R, Salvatore F, Russo E, Volpe G, Becchimanzi A, Mahamedi AE, Berraf-Tebbal A, Andolfi A. Secondary Metabolites, including a New 5,6-Dihydropyran-2-One, Produced by the Fungus Diplodia corticola. Aphicidal Activity of the Main Metabolite, Sphaeropsidin A. Molecules 2022; 27:molecules27072327. [PMID: 35408726 PMCID: PMC9000672 DOI: 10.3390/molecules27072327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 03/30/2022] [Accepted: 03/31/2022] [Indexed: 02/05/2023] Open
Abstract
An undescribed 5,6-dihydropyran-2-one, namely diplopyrone C, was isolated and characterized from the cultures of an isolate of the fungus Diplodia corticola recovered from Quercus suber in Algeria. The structure and relative stereostructure of (5S,6S,7Z,9S,10S)-5-hydroxy-6-(2-(3-methyloxiran-2-yl)vinyl)-5,6-dihydro-2H-pyran-2-one were assigned essentially based on NMR and MS data. Furthermore, ten known compounds were isolated and identified in the same cultures. The most abundant product, the tetracyclic pimarane diterpene sphaeropsidin A, was tested for insecticidal effects against the model sucking aphid, Acyrthosiphon pisum. Results showed a toxic dose-dependent oral activity of sphaeropsidin A, with an LC50 of 9.64 mM.
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Affiliation(s)
- Maria Michela Salvatore
- Department of Chemical Sciences, University of Naples Federico II, 80126 Naples, Italy; (M.M.S.); (M.D.); (F.S.)
- Institute for Sustainable Plant Protection, National Research Council, 80055 Portici, Italy
| | - Ilaria Di Lelio
- Department of Agriculture, University of Naples Federico II, 80055 Portici, Italy; (I.D.L.); (R.N.); (E.R.); (G.V.); (A.B.)
| | - Marina DellaGreca
- Department of Chemical Sciences, University of Naples Federico II, 80126 Naples, Italy; (M.M.S.); (M.D.); (F.S.)
| | - Rosario Nicoletti
- Department of Agriculture, University of Naples Federico II, 80055 Portici, Italy; (I.D.L.); (R.N.); (E.R.); (G.V.); (A.B.)
- Research Center for Olive, Fruit, and Citrus Crops, Council for Agricultural Research and Economics, 81100 Caserta, Italy
| | - Francesco Salvatore
- Department of Chemical Sciences, University of Naples Federico II, 80126 Naples, Italy; (M.M.S.); (M.D.); (F.S.)
| | - Elia Russo
- Department of Agriculture, University of Naples Federico II, 80055 Portici, Italy; (I.D.L.); (R.N.); (E.R.); (G.V.); (A.B.)
| | - Gennaro Volpe
- Department of Agriculture, University of Naples Federico II, 80055 Portici, Italy; (I.D.L.); (R.N.); (E.R.); (G.V.); (A.B.)
| | - Andrea Becchimanzi
- Department of Agriculture, University of Naples Federico II, 80055 Portici, Italy; (I.D.L.); (R.N.); (E.R.); (G.V.); (A.B.)
| | - Alla Eddine Mahamedi
- Department of Biology, Faculty of Natural Sciences, Life and Earth Sciences, University of Ghardaia, Ghardaia 47000, Algeria;
| | - Akila Berraf-Tebbal
- Mendeleum-Institute of Genetics, Faculty of Horticulture, Mendel University in Brno, 69144 Lednice, Czech Republic;
| | - Anna Andolfi
- Department of Chemical Sciences, University of Naples Federico II, 80126 Naples, Italy; (M.M.S.); (M.D.); (F.S.)
- BAT Center-Interuniversity Center for Studies on Bioinspired Agro-Environmental Technology, University of Naples Federico II, 80055 Portici, Italy
- Correspondence:
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35
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Zhang R, Shi X, Chen Y, Liu J, Wu Y, Xu Y. Multi-Omics Revealed the Protective Effects of Rhamnolipids in Lipopolysaccharide Challenged Broilers. Front Immunol 2022; 13:824664. [PMID: 35251004 PMCID: PMC8895253 DOI: 10.3389/fimmu.2022.824664] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 01/24/2022] [Indexed: 12/30/2022] Open
Abstract
Rhamnolipid (RL) is a glycolipid biosurfactant and exhibits the following outstanding characteristics: strong antibacterial properties, low toxicity, and high biodegradability. The present research was conducted to explore the protective effects and mechanisms of rhamnolipids as an alternative to antibiotics in LPS (lipopolysaccharide)-challenged broilers. 16S rRNA gene sequencing and metabolomics were used for analyzing the cecal microbial composition and serum metabolites. Dietary antibiotics and RLS supplementation decreased the weight loss rate, enhanced serum immunoglobulin levels, reduced serum diamine oxidase and D-lactate acid concentration, and improved the symptoms of intestinal bleeding and villus height, when broilers were challenged with LPS. The addition of RLS in the diet enhanced serum interleukin-4 and interleukin-10 contents and reduced serum interleukin-6 and tumor necrosis factor-α levels in LPS-challenged broilers compared with the antibiotics group. Spearman’s correlation analysis revealed that RLS may alleviate LPS-induced inflammatory responses through altering the 6-methoxymellein level in broilers. The genus Bacteroides may contribute to the decreased weight loss rate via regulating the serum lysoPC [20:5(5Z,8Z,11Z,14Z,17Z)] secretion. RLS alleviates LPS-induced intestinal injury, enhances the growth and immunity, ameliorates intestinal microflora, and improves serum metabolites in LPS-challenged broilers. RLS exhibited better protective effect than antibiotic supplementation in the diet of LPS-challenged broilers. These findings provide potential regulation strategies and novel insights for RLS enhancing its protective effect in LPS-challenged broilers.
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Affiliation(s)
- Ruiqiang Zhang
- College of Animal Science and Technology, College of Veterinary Medicine, Zhejiang Agricultural and Forestry University, Hangzhou, China
| | - Xueyan Shi
- College of Animal Science and Technology, College of Veterinary Medicine, Zhejiang Agricultural and Forestry University, Hangzhou, China
| | - Yuqi Chen
- Institute of Animal Health Products, Zhejiang Vegamax Biotechnology Co., Ltd., Anji, China
| | - Jinsong Liu
- Institute of Animal Health Products, Zhejiang Vegamax Biotechnology Co., Ltd., Anji, China
| | - Yanping Wu
- College of Animal Science and Technology, College of Veterinary Medicine, Zhejiang Agricultural and Forestry University, Hangzhou, China
| | - Yinglei Xu
- College of Animal Science and Technology, College of Veterinary Medicine, Zhejiang Agricultural and Forestry University, Hangzhou, China
- *Correspondence: Yinglei Xu,
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36
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Yin F, Peng W, Wang C, Qu L, Chen X, Kong L, Wang X. Rhodium(III)‐ Catalyzed Cleavage of C‐C Bond and C‐H Bond Cascaded by Michael Addition for the Conversion of α‐Hydroxy Ketones to Phthalides and Isocoumarins. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Fucheng Yin
- China Pharmaceutical University School of Traditional Chinese Pharmacy Nanjing CHINA
| | - Wan Peng
- China Pharmaceutical University State Key Laboratory of Natural Medicines Nanjing CHINA
| | - Cheng Wang
- China Pharmaceutical University State Key Laboratory of Natural Medicines Nanjing CHINA
| | - Lailiang Qu
- China Pharmaceutical University State Key Laboratory of Natural Medicines Nanjing CHINA
| | - Xinye Chen
- China Pharmaceutical University State Key Laboratory of Natural Medicines Nanjing CHINA
| | - Lingyi Kong
- China Pharmaceutical University State Key Laboratory of Natural Medicines Nanjing CHINA
| | - Xiaobing Wang
- China Pharmaceutical University Department of Natural Medicinal Chemistry No. 24Tong Jia Xiang 210009 Nanjing CHINA
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37
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El Qami A, Jismy B, Akssira M, Jacquemin J, Tikad A, Abarbri M. A Ag 2CO 3/TFA-catalyzed intramolecular annulation approach to imidazo[1,2- c][1,3]oxazin-5-one derivatives. Org Biomol Chem 2022; 20:1518-1531. [PMID: 35112683 DOI: 10.1039/d1ob02352g] [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
A series of 2,7-disubstituted 3-methylimidazo[1,2-c][1,3]oxazin-5-ones were synthesized in good yields via Ag2CO3/TFA-mediated intramolecular annulation of N-Boc-2-alkynyl-4-bromo(alkynyl)-5-methylimidazoles. This methodology was carried out in the presence of a catalytic amount of silver carbonate and trifluoroacetic acid in dichloroethane at 60 °C. In all experiments, only the six-membered ring product was obtained since the possible five-membered compound was not observed, proving the high regioselectivity of this approach. A complementary computational study was performed in order to rationalize the mechanism of 6-endo-dig heterocycle formation. In addition, 2-bromo-3-methyl-7-phenylimidazo[1,2-c][1,3]oxazin-5-one was used as a building block to synthesize a small library of new 2-substituted imidazo[1,2-c][1,3]oxazin-5-one derivatives through the Suzuki, Sonogashira and Heck cross coupling reactions.
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Affiliation(s)
- Abdelkarim El Qami
- Laboratoire de Physico-Chimie des Matériaux et des Electrolytes pour l'Energie (PCM2E), EA 6299, Université de Tours, Faculté des Sciences et Techniques, Avenue Monge Faculté des Sciences, Parc de Grandmont, 37200 Tours, France. .,Laboratoire de Chimie Physique et de Chimie Bioorganique, URAC 22. Université Hassan II de Casablanca, Faculté des Sciences et Techniques de Mohammedia, B.P. 146, 28800 Mohammedia, Morocco
| | - Badr Jismy
- Laboratoire de Physico-Chimie des Matériaux et des Electrolytes pour l'Energie (PCM2E), EA 6299, Université de Tours, Faculté des Sciences et Techniques, Avenue Monge Faculté des Sciences, Parc de Grandmont, 37200 Tours, France.
| | - Mohamed Akssira
- Laboratoire de Chimie Physique et de Chimie Bioorganique, URAC 22. Université Hassan II de Casablanca, Faculté des Sciences et Techniques de Mohammedia, B.P. 146, 28800 Mohammedia, Morocco
| | - Johan Jacquemin
- Laboratoire de Physico-Chimie des Matériaux et des Electrolytes pour l'Energie (PCM2E), EA 6299, Université de Tours, Faculté des Sciences et Techniques, Avenue Monge Faculté des Sciences, Parc de Grandmont, 37200 Tours, France.
| | - Abdellatif Tikad
- Laboratoire de Chimie Moléculaire et Substances Naturelles. Université Moulay Ismail, Faculté des Sciences, B.P. 11201, Zitoune, Meknès, Morocco
| | - Mohamed Abarbri
- Laboratoire de Physico-Chimie des Matériaux et des Electrolytes pour l'Energie (PCM2E), EA 6299, Université de Tours, Faculté des Sciences et Techniques, Avenue Monge Faculté des Sciences, Parc de Grandmont, 37200 Tours, France.
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38
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Yin C, Li L, Yu C. Rh(III)-catalyzed C-H annulation of sulfoxonium ylides with iodonium ylides towards isocoumarins. Org Biomol Chem 2022; 20:1112-1116. [PMID: 35040469 DOI: 10.1039/d1ob02273c] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The direct synthesis of isocoumarin skeletons has been realized through the Rh(III)-catalyzed [3 + 3] annulation of sulfoxonium ylides with iodonium carbenes. The synthetic protocol was constructed efficiently with broad functional group tolerance and mild reaction conditions. This reaction can be formally viewed as the result of C-H activation, carbene insertion and nucleophilic addition processes. Furthermore, the further conversions of the product and gram-scale reactions were also demonstrate to support the effectiveness of the synthesis protocol.
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Affiliation(s)
- Chuanliu Yin
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, 310014, P. R. China.
| | - Lianghao Li
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, 310014, P. R. China.
| | - Chuanming Yu
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, 310014, P. R. China.
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39
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Cui Y, Zhang G, Li Y, Li W, Tanabe G, Osamu M, Xie W. Microwave‐Assisted Synthesis of
d/l‐
Agrimonolide. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202100334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Yu‐Ang Cui
- State Key Laboratory of Natural Medicines (SKLNM) and Department of Medicinal Chemistry School of Pharmacy China Pharmaceutical University Nanjing 210009 P. R. China
| | - Guang‐Yu Zhang
- State Key Laboratory of Natural Medicines (SKLNM) and Department of Medicinal Chemistry School of Pharmacy China Pharmaceutical University Nanjing 210009 P. R. China
| | - Yun‐Zhi Li
- State Key Laboratory of Natural Medicines (SKLNM) and Department of Medicinal Chemistry School of Pharmacy China Pharmaceutical University Nanjing 210009 P. R. China
| | - Wei Li
- State Key Laboratory of Natural Medicines (SKLNM) and Department of Medicinal Chemistry School of Pharmacy China Pharmaceutical University Nanjing 210009 P. R. China
| | - Genzoh Tanabe
- Faculty of Pharmacy Kinki University 3-4-1 Kowakae Higashi-osaka 577-8502 Osaka Japan
| | - Muraoka Osamu
- Faculty of Pharmacy Kinki University 3-4-1 Kowakae Higashi-osaka 577-8502 Osaka Japan
| | - Wei‐Jia Xie
- State Key Laboratory of Natural Medicines (SKLNM) and Department of Medicinal Chemistry School of Pharmacy China Pharmaceutical University Nanjing 210009 P. R. China
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40
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Mingzhou S, Lanlan Z, Miaomiao C, Wangcheng H, Xinwei H, Hongjian L. Synthesis of Esterified/Fused Isocoumarins via Rh-Catalyzed C—H Activation/Transannulative Coupling/Annulation of Phthalic Anhydrides with Cyclic 2-Diazo-1,3-diketones and Methanol. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202205039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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41
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Du G, Kong GH, Hu QF, Zhang LF, Zhang GH, Bao MF, Li YK, Miao D, Wu YP. New Anti-TMV Isochromenes from Nicotiana Tabacum-Derived Endophytic Fungus Aspergillus Versicolor. HETEROCYCLES 2022. [DOI: 10.3987/com-22-14713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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42
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Mancuso R, Ziccarelli I, Novello M, Cuocci C, Centore R, Della Ca' N, Olivieri D, Carfagna C, Gabriele B. A palladium iodide catalyzed regioselective carbonylative route to isocoumarin and thienopyranone carboxylic esters. J Catal 2022. [DOI: 10.1016/j.jcat.2021.11.028] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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43
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Wang L, Shao Y, Chen F, Qian P, Cheng J. Rhodium-Catalyzed Directing Group-Assisted Annulation of Arene C—H Bond with Vinylene Carbonate toward Isocoumarins. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202106023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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44
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Duttwyler S. Derivatization of monocarborane and dodecaborate anions by controlled B H activation. ADVANCES IN CATALYSIS 2022. [DOI: 10.1016/bs.acat.2022.05.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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45
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Cytotoxic and Anti-Inflammatory Activities of Dihydroisocoumarin and Xanthone Derivatives from Garcinia picrorhiza. Molecules 2021; 26:molecules26216626. [PMID: 34771035 PMCID: PMC8587515 DOI: 10.3390/molecules26216626] [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: 09/06/2021] [Revised: 10/03/2021] [Accepted: 10/08/2021] [Indexed: 11/17/2022] Open
Abstract
Garcinia picrorhiza, a woody plant native to Sulawesi and Maluku Islands, Indonesia, has been traditionally used as a wound healing ointment. In our continuous search for bioactive compounds from this plant, 15 phenolic compounds were isolated from its stem bark, including a previously undescribed dihydroisocoumarin, 2'-hydroxyannulatomarin, and two undescribed furanoxanthones, gerontoxanthone C hydrate and 3'-hydroxycalothorexanthone. The structures of the new metabolites were elucidated on the basis of spectroscopic analysis, including 1D and 2D NMR and HRESIMS. Gerontoxanthone C hydrate possessed cytotoxicity against four cancer cells (KB, HeLa S3, MCF-7, and Hep G2) with IC50 values ranging from 5.6 to 7.5 µM. Investigation on the anti-inflammatory activities showed that 3'-hydroxycalothorexanthone inhibited NO production in RAW 264.7 and BV-2 cell lines with IC50 values of 16.4 and 13.8 µM, respectively, whereas only (-)-annulatomarin possessed inhibition activity on COX-2 enzyme over 10% at 20 µM. This work describes the presence of 3,4-dihydroisocoumarin structures with a phenyl ring substituent at C-3, which are reported the first time in genus Garcinia. These findings also suggest the potential of furanxanthone derivatives as cytotoxic and anti-inflammatory agents for further pharmacological studies.
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Singh Aidhen I, Thoti N. Natural Products & Bioactivity Inspired Synthetic Pursuits Interfacing with Carbohydrates: Ongoing Journey with C-Glycosides. CHEM REC 2021; 21:3131-3177. [PMID: 34714570 DOI: 10.1002/tcr.202100216] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 09/27/2021] [Indexed: 12/14/2022]
Abstract
Natural products, remains the most important source for the discovery of new drugs for the treatment of human diseases. This has inspired the synthetic community to design and develop mimics of natural products either to answer important questions in biology or to explore their therapeutic potentials. Glycosides present themselves abundantly in nature, right from the cell surface receptors to natural products of any origin. The O-Glycosides are hydrolytically less stable compared to C-glycosides and this feature has presented a great opportunity for drug discovery. The discovery of Dapagliflozin, an SGLT inhibitor and C-glucoside, for the treatment of diabetes is one such example. Aryl acyl-anion chemistry has been explored for the synthesis of 2-deoxy-C-aryl furanoside/pyranoside/septanosides. Besides success, the studies have provided valuable insight into the natural propensities of the architectural framework for the cascade to furan derivatives. The aryl acyl-anion chemistry has also enabled the synthesis of biologically active diaryl heptanoids. Inspired from sucesss of Dapagliflozin, new analogues have been synthesized with pyridine and isocoumarin heterocycle as the proximal ring. C-glucosides of isoliquiritigenin have been synthesized for the first time and evaluated as an efficient aldose reductase inhibitor. The synthesis and evaluation of acyl-C-β-D-glucosides and benzyl-C-β-D-glucoside as glucose-uptake promoters has revealed promise in small molecules. The concept of building blocks has been used to obtain natural oxylipins, D-xylo and L-xylo-configured alkane tetrols and novel lipophilic ketones with erythro/threo configured trihydroxy polar head-group as possible anti-mycobacterial agents.
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Affiliation(s)
- Indrapal Singh Aidhen
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600036, India
| | - Naveenkumar Thoti
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600036, India
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Goulart HA, Neto JSS, Barcellos AM, Silva KB, de Moraes MC, Jacob RG, Lenardão EJ, Barcellos T, Perin G. Synthesis of 4-Selanyl- and 4-Tellanyl-1 H-isochromen-1-ones Promoted by Diorganyl Dichalcogenides and Oxone. J Org Chem 2021; 86:14016-14027. [PMID: 33750133 DOI: 10.1021/acs.joc.1c00271] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A new method was developed for the synthesis of 4-chalcogenyl-1H-isochromen-1-ones through the 6-endo-dig electrophilic cyclization of 2-alkynylaryl esters and diorganyl dichalcogenides under ultrasound irradiation. The reactions were performed under mild conditions, using Oxone as a green oxidant to promote the cleavage of the chalcogen-chalcogen bond in diorganyl diselenides and ditellurides to generate electrophilic species in situ. A total of 25 compounds were selectively obtained after 30-70 min, in good to excellent yields (74-95%). This procedure was extended to prepare 5H-selenopheno[3,2-c]isochromen-5-ones. Additionally, for the first time, the 4-chalcogenyl-1H-isochromen-1-ones were used as substrates in the thionation reaction, using Lawesson's reagent and microwave irradiation under solvent-free conditions, obtaining the thio derivatives in yields of up to 99% in only 15 min.
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Affiliation(s)
- Helen A Goulart
- Laboratório de Síntese Orgânica Limpa - LASOL, CCQFA, Universidade Federal de Pelotas - UFPel, P.O. Box 354 - 96010-900 Pelotas, RS. Brazil
| | - José S S Neto
- Laboratório de Síntese Orgânica Limpa - LASOL, CCQFA, Universidade Federal de Pelotas - UFPel, P.O. Box 354 - 96010-900 Pelotas, RS. Brazil
| | - Angelita M Barcellos
- Laboratório de Síntese Orgânica Limpa - LASOL, CCQFA, Universidade Federal de Pelotas - UFPel, P.O. Box 354 - 96010-900 Pelotas, RS. Brazil
| | - Krigor B Silva
- Laboratório de Síntese Orgânica Limpa - LASOL, CCQFA, Universidade Federal de Pelotas - UFPel, P.O. Box 354 - 96010-900 Pelotas, RS. Brazil
| | - Maiara C de Moraes
- Laboratory of Biotechnology of Natural and Synthetic Products, Universidade de Caxias do Sul, 95070-560 Caxias do Sul, RS, Brazil
| | - Raquel G Jacob
- Laboratório de Síntese Orgânica Limpa - LASOL, CCQFA, Universidade Federal de Pelotas - UFPel, P.O. Box 354 - 96010-900 Pelotas, RS. Brazil
| | - Eder J Lenardão
- Laboratório de Síntese Orgânica Limpa - LASOL, CCQFA, Universidade Federal de Pelotas - UFPel, P.O. Box 354 - 96010-900 Pelotas, RS. Brazil
| | - Thiago Barcellos
- Laboratory of Biotechnology of Natural and Synthetic Products, Universidade de Caxias do Sul, 95070-560 Caxias do Sul, RS, Brazil
| | - Gelson Perin
- Laboratório de Síntese Orgânica Limpa - LASOL, CCQFA, Universidade Federal de Pelotas - UFPel, P.O. Box 354 - 96010-900 Pelotas, RS. Brazil
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Conversion of 5-methyl-4H-benzo[d][1,3]dioxin-4-one derivatives into functionalized 8-hydroxyisochroman-1-one under basic conditions. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153367] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Guo HX, Huang CY, Yan ZY, Chen T, Hong K, Long YH. New furo[3,2-h]isochroman from the mangrove endophytic fungus Aspergillus sp. 085242. Chin J Nat Med 2021; 18:855-859. [PMID: 33308608 DOI: 10.1016/s1875-5364(20)60028-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Indexed: 12/29/2022]
Abstract
Four new compounds, asperisocoumarin G (1), asperisocoumarin H (2), (±)-asperisocoumarin I [(±)-3], along with the known pergillin (4) and penicisochroman L (5) were isolated from a mangrove endophytic fungus Aspergillus sp. 085242 by further chemical investigation. The structures of the new compounds, including their absolute configurations, were established by analysis of HR-ESI-MS and NMR spectroscopic data, and ECD calculation. Asperisocoumarins G-I (1-3) were new isocoumarins belonging to the class of furo[3, 2-h]isocoumarins which are rarely found in natural sources. All of the isolated compounds were evaluated for their α-glucosidase inhibitory effects, and compounds 1 and 4 showed moderate α-glucosidase inhibitory activity, respectively. In an antimicrobial test, the racemate of 3 showed antibacterial activity against Salmonella.
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Affiliation(s)
- Hui-Xian Guo
- School of Chemistry, Guangzhou Key Laboratory of Analytical Chemistry for Biomedicine, South China Normal University, Guangzhou 510006, China
| | - Cui-Ying Huang
- School of Chemistry, Guangzhou Key Laboratory of Analytical Chemistry for Biomedicine, South China Normal University, Guangzhou 510006, China
| | - Zhang-Yuan Yan
- School of Chemistry, Guangzhou Key Laboratory of Analytical Chemistry for Biomedicine, South China Normal University, Guangzhou 510006, China
| | - Tao Chen
- School of Chemistry, Guangzhou Key Laboratory of Analytical Chemistry for Biomedicine, South China Normal University, Guangzhou 510006, China
| | - Kui Hong
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery (Wuhan University), Ministry of Education, and Wuhan University School of Pharmaceutical Sciences, Wuhan, 430071, China
| | - Yu-Hua Long
- School of Chemistry, Guangzhou Key Laboratory of Analytical Chemistry for Biomedicine, South China Normal University, Guangzhou 510006, China.
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Habert L, Diachenko I, Retailleau P, Gillaizeau I. Electrophile promoted cyclization of ortho-aryl substituted ynamides: construction of 3-amino-4-halo- or 4 seleno-isocoumarin derivatives. Org Biomol Chem 2021; 19:6623-6627. [PMID: 34282818 DOI: 10.1039/d1ob01075a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Isocoumarins are important building blocks in medicinal chemistry. They are widespread in the core structure of biologically active compounds. Here we report the development of an efficient and highly reactive electrophilic cyclization of ortho-ynamidyl benzoate esters providing access to 3-amino-4-halo- or 4-seleno-isocoumarins in a short time (<1 min) with good yields.
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Affiliation(s)
- Loïc Habert
- Institute of Organic and Analytical Chemistry, ICOA UMR 7311 CNRS, Université d'Orléans, Pôle de chimie, Rue de Chartres, 45100 Orléans, France.
| | - Iryna Diachenko
- Institute of Organic and Analytical Chemistry, ICOA UMR 7311 CNRS, Université d'Orléans, Pôle de chimie, Rue de Chartres, 45100 Orléans, France.
| | - Pascal Retailleau
- Institut de Chimie des Substances Naturelles, UPR 2301, CNRS, Gif-sur-Yvette, France
| | - Isabelle Gillaizeau
- Institute of Organic and Analytical Chemistry, ICOA UMR 7311 CNRS, Université d'Orléans, Pôle de chimie, Rue de Chartres, 45100 Orléans, France.
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