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Shen SM, Appendino G, Guo YW. Pitfalls in the structural elucidation of small molecules. A critical analysis of a decade of structural misassignments of marine natural products. Nat Prod Rep 2022; 39:1803-1832. [PMID: 35770685 DOI: 10.1039/d2np00023g] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Covering: July 2010 to August 2021This article summarizes more than 200 cases of misassigned marine natural products reported between July 2010 and August 2021, sorting out errors according to the structural elements. Based on a comparative analysis of the original and the revised structures, major pitfalls still plaguing the structural elucidation of small molecules were identified, emphasizing the role of total synthesis, crystallography, as well as chemical- and biosynthetic logic to complement spectroscopic data. Distinct "trends" in natural product misassignment are evident between compounds of marine and plant origin, with an overall much lower incidence of "impossible" structures within misassigned marine natural products.
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Affiliation(s)
- Shou-Mao Shen
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China. .,School of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Giovanni Appendino
- Dipartimento di Scienze del Farmaco, Universitá degli Studi del Piemonte Orientale, Largo Donegani 2, 28100 Novara, Italy
| | - Yue-Wei Guo
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China. .,Drug Discovery Shandong Laboratory, Bohai Rim Advanced Research Institute for Drug Discovery, Yantai, Shandong 264117, China
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2
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Deep-Sea Natural Products from Extreme Environments: Cold Seeps and Hydrothermal Vents. Mar Drugs 2022; 20:md20060404. [PMID: 35736207 PMCID: PMC9229347 DOI: 10.3390/md20060404] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 06/08/2022] [Accepted: 06/14/2022] [Indexed: 12/28/2022] Open
Abstract
The deep sea has been proven to be a great treasure for structurally unique and biologically active natural products in the last two decades. Cold seeps and hydrothermal vents, as typical representatives of deep-sea extreme environments, have attracted more and more attention. This review mainly summarizes the natural products of marine animals, marine fungi, and marine bacteria derived from deep-sea cold seeps and hydrothermal vents as well as their biological activities. In general, there were 182 compounds reported, citing 132 references and covering the literature from the first report in 1984 up to March 2022. The sources of the compounds are represented by the genera Aspergillus sp., Penicillium sp., Streptomyces sp., and so on. It is worth mentioning that 90 of the 182 compounds are new and that almost 60% of the reported structures exhibited diverse bioactivities, which became attractive targets for relevant organic synthetic and biosynthetic studies.
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Bokoskie T, Cunningham C, Kornman C, Kesharwani T, Pattabiraman M. Iodocyclization in Aqueous Media and Supramolecular Reaction Control Using Water-Soluble Hosts. ACS OMEGA 2019; 4:17830-17836. [PMID: 31681890 PMCID: PMC6822118 DOI: 10.1021/acsomega.9b02466] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Accepted: 10/03/2019] [Indexed: 06/10/2023]
Abstract
Iodocyclization of 2-alkynylanisoles is an efficient route for synthesizing substituted benzofurans. Reaction efficiency with copper(II) sulfate and sodium iodide in an aqueous slurry under mild conditions is a manifold higher than in organic solvents. Water-soluble hosts of the cyclodextrin family solubilize the compounds in aqueous media and affect the reaction efficiency through conformation control and steric interactions. Computational chemistry and spectral titration provide information on the host-guest complex structure and insight into the mechanistic basis of the observed effects.
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Affiliation(s)
- Treyvon Bokoskie
- Department
of Chemistry, University of Nebraska Kearney, Kearney, Nebraska 68849, United States
| | - Christopher Cunningham
- Department
of Chemistry, University of West Florida, Pensacola, Florida 32514, United States
| | - Cory Kornman
- Department
of Chemistry, University of West Florida, Pensacola, Florida 32514, United States
| | - Tanay Kesharwani
- Department
of Chemistry, University of West Florida, Pensacola, Florida 32514, United States
| | - Mahesh Pattabiraman
- Department
of Chemistry, University of Nebraska Kearney, Kearney, Nebraska 68849, United States
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Cai R, Jiang H, Zang Z, Li C, She Z. New Benzofuranoids and Phenylpropanoids from the Mangrove Endophytic Fungus, Aspergillus sp. ZJ-68. Mar Drugs 2019; 17:md17080478. [PMID: 31426620 PMCID: PMC6723808 DOI: 10.3390/md17080478] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 08/13/2019] [Accepted: 08/16/2019] [Indexed: 11/16/2022] Open
Abstract
Three new benzofuranoids, asperfuranoids A-C (1-3), two new phenylpropanoid derivatives (6 and 7), and nine known analogues (4, 5, and 8-14) were isolated from the liquid substrate fermentation cultures of the mangrove endopytic fungus Aspergillus sp. ZJ-68. The structures of the new compounds were determined by extensive spectroscopic data interpretation. The absolute configurations of 1-3 were assigned via the combination of Mosher's method, and experimental and calculated electronic circular dichroism (ECD) data. Compounds 4 and 5 were a pair of enantiomers and their absolute configurations were established for the first time on the basis of their ECD spectra aided with ECD calculations. All isolated compounds (1-14) were evaluated for their enzyme inhibitory activity against α-glucosidase and antibacterial activities against four pathogenic bacteria (Staphylococcus aureus, Escherichia coli, Bacillus subtilis, and Pseudomonas aeruginosa). Among them, compound 6 exhibited potent inhibitory activity against α-glucosidase in a standard in vitro assay, with an IC50 value of 12.4 μM, while compounds 8 and 11 showed activities against S. aureus, E. coli, and B. subtilis, with MIC values in the range of 4.15 to 12.5 μg/mL.
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Affiliation(s)
- Runlin Cai
- School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
| | - Hongming Jiang
- School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
| | - Zhenming Zang
- School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
| | - Chunyuan Li
- College of Materials and Energy, South China Agricultural University, Guangzhou 510642, China.
| | - Zhigang She
- School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China.
- South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center, Guangzhou 510006, China.
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Hanif N, Murni A, Tanaka C, Tanaka J. Marine Natural Products from Indonesian Waters. Mar Drugs 2019; 17:md17060364. [PMID: 31248122 PMCID: PMC6627775 DOI: 10.3390/md17060364] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 06/10/2019] [Accepted: 06/11/2019] [Indexed: 12/13/2022] Open
Abstract
Natural products are primal and have been a driver in the evolution of organic chemistry and ultimately in science. The chemical structures obtained from marine organisms are diverse, reflecting biodiversity of genes, species and ecosystems. Biodiversity is an extraordinary feature of life and provides benefits to humanity while promoting the importance of environment conservation. This review covers the literature on marine natural products (MNPs) discovered in Indonesian waters published from January 1970 to December 2017, and includes 732 original MNPs, 4 structures isolated for the first time but known to be synthetic entities, 34 structural revisions, 9 artifacts, and 4 proposed MNPs. Indonesian MNPs were found in 270 papers from 94 species, 106 genera, 64 families, 32 orders, 14 classes, 10 phyla, and 5 kingdoms. The emphasis is placed on the structures of organic molecules (original and revised), relevant biological activities, structure elucidation, chemical ecology aspects, biosynthesis, and bioorganic studies. Through the synthesis of past and future data, huge and partly undescribed biodiversity of marine tropical invertebrates and their importance for crucial societal benefits should greatly be appreciated.
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Affiliation(s)
- Novriyandi Hanif
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, IPB University (Bogor Agricultural University), Bogor 16680, Indonesia.
| | - Anggia Murni
- Tropical Biopharmaca Research Center, IPB University (Bogor Agricultural University), Bogor 16128, Indonesia.
| | - Chiaki Tanaka
- Department of Natural Products Chemistry, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka 812-8582, Japan.
| | - Junichi Tanaka
- Department of Chemistry, Biology, and Marine Science, University of the Ryukyus, Nishihara, Okinawa 903-0213, Japan.
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Liu C, Xu Y, Niu S, Wei L, Liu Y, Wang Y, Zhu J, Fu J, Yuan J. Functional Ionic Liquids Promoted Double Michael Reaction of Benzofuran-3-one or 1-Indone and Symmetric Dienones: Construction of Spiro[benzofuran-2,1’-cyclohexane]-3-one or Spiro[cyclohexane-1,2’-indene]-1’,4(3’H
)-dione Derivatives. CHINESE J CHEM 2017. [DOI: 10.1002/cjoc.201600796] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Chunhui Liu
- Henan Engineering Laboratory of Flame-Retardant and Functional Materials, College of Chemistry and Chemical Engineering; Henan University; Kaifeng Henan 475004 China
| | - Yalun Xu
- Henan Engineering Laboratory of Flame-Retardant and Functional Materials, College of Chemistry and Chemical Engineering; Henan University; Kaifeng Henan 475004 China
| | - Songyang Niu
- Henan Engineering Laboratory of Flame-Retardant and Functional Materials, College of Chemistry and Chemical Engineering; Henan University; Kaifeng Henan 475004 China
| | - Liquan Wei
- High School Affiliated to Henan University; Kaifeng Henan 475004 China
| | - Yong Liu
- Henan Engineering Laboratory of Flame-Retardant and Functional Materials, College of Chemistry and Chemical Engineering; Henan University; Kaifeng Henan 475004 China
| | - Yanbo Wang
- Henan Engineering Laboratory of Flame-Retardant and Functional Materials, College of Chemistry and Chemical Engineering; Henan University; Kaifeng Henan 475004 China
| | - Junyan Zhu
- Henan Engineering Laboratory of Flame-Retardant and Functional Materials, College of Chemistry and Chemical Engineering; Henan University; Kaifeng Henan 475004 China
| | - Jiya Fu
- Henan Engineering Laboratory of Flame-Retardant and Functional Materials, College of Chemistry and Chemical Engineering; Henan University; Kaifeng Henan 475004 China
| | - Jinfang Yuan
- Henan Engineering Laboratory of Flame-Retardant and Functional Materials, College of Chemistry and Chemical Engineering; Henan University; Kaifeng Henan 475004 China
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Xiao Z, Chen S, Cai R, Lin S, Hong K, She Z. New furoisocoumarins and isocoumarins from the mangrove endophytic fungus Aspergillus sp. 085242. Beilstein J Org Chem 2016; 12:2077-2085. [PMID: 27829913 PMCID: PMC5082600 DOI: 10.3762/bjoc.12.196] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2016] [Accepted: 09/08/2016] [Indexed: 01/22/2023] Open
Abstract
The chemical investigation of the mangrove endophytic fungus Aspergillus sp. 085242 afforded eight isocoumarin derivatives 1–8 and one isoquinoline 9. Asperisocoumarins A and B (1 and 2) were new furoisocoumarins, and asperisocoumarins E and F (5 and 6) were new isocoumarins. Their structures were established by analysis of their spectroscopic data and the absolute configuration of compound 2 was unambiguously determined by X-ray structure analysis and ECD calculation. Moreover, the absolute configurations of compounds 3–5 were assigned by comparison of their ECD spectra with isocoumarins described in the literature. Asperisocoumarins C and D (3 and 4) were fully characterized spectroscopically and isolated from a natural source for the first time. Asperisocoumarins A–D (1–4) related to the class of furo[3,2-h]isocoumarins are rarely occurring in natural sources. Compounds 2, 5, and 6 showed moderate α-glucosidase inhibitory activity with IC50 of 87.8, 52.3, and 95.6 μM, respectively. In addition, compounds 1 and 3 exhibited weak radical scavenging activity with EC50 values of 125 and 138 μM, respectively.
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Affiliation(s)
- Ze'en Xiao
- School of Chemistry and Chemical Engineering, Sun Yat-Sen University, No. 135 of Xingang West Road, Guangzhou, 510275, China.,Shenzhen Academy of Metrology and Quality Inspection, No. 144 of Minkan Road, Minzhi Street, Longhua District, Shenzhen, 518102, China
| | - Senhua Chen
- School of Chemistry and Chemical Engineering, Sun Yat-Sen University, No. 135 of Xingang West Road, Guangzhou, 510275, China
| | - Runlin Cai
- School of Chemistry and Chemical Engineering, Sun Yat-Sen University, No. 135 of Xingang West Road, Guangzhou, 510275, China
| | - Shao'e Lin
- School of Chemistry and Chemical Engineering, Sun Yat-Sen University, No. 135 of Xingang West Road, Guangzhou, 510275, China
| | - Kui Hong
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education of China, School of Pharmaceutical Sciences, Wuhan University, Wuhan, 430071, China
| | - Zhigang She
- School of Chemistry and Chemical Engineering, Sun Yat-Sen University, No. 135 of Xingang West Road, Guangzhou, 510275, China
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