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Kõllo M, Rõuk K, Järving I, Pehk T, Lopp M. Towards the total synthesis of 9,11-secosterol: Linking A,B- and D-rings with Michael addition to sulfone-activated cyclopentanone. Tetrahedron 2023. [DOI: 10.1016/j.tet.2023.133363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
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Kõllo M, Kasari M, Kasari V, Pehk T, Järving I, Lopp M, Jõers A, Kanger T. Designed whole-cell-catalysis-assisted synthesis of 9,11-secosterols. Beilstein J Org Chem 2021; 17:581-588. [PMID: 33747232 PMCID: PMC7940815 DOI: 10.3762/bjoc.17.52] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 02/17/2021] [Indexed: 01/29/2023] Open
Abstract
A method for the synthesis of 9,11-secosteroids starting from the natural corticosteroid cortisol is described. There are two key steps in this approach, combining chemistry and synthetic biology. Stereo- and regioselective hydroxylation at C9 (steroid numbering) is carried out using whole-cell biocatalysis, followed by the chemical cleavage of the C-C bond of the vicinal diol. The two-step method features mild reaction conditions and completely excludes the use of toxic oxidants.
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Affiliation(s)
- Marek Kõllo
- Department of Chemistry and Biotechnology, School of Science, Tallinn University of Technology, Akadeemia tee 15, 12618 Tallinn, Estonia
| | - Marje Kasari
- Institute of Technology, University of Tartu, Nooruse 1, 50104 Tartu, Estonia
| | - Villu Kasari
- Institute of Technology, University of Tartu, Nooruse 1, 50104 Tartu, Estonia
| | - Tõnis Pehk
- National Institute of Chemical Physics and Biophysics, Akadeemia tee 23, 12618 Tallinn, Estonia
| | - Ivar Järving
- Department of Chemistry and Biotechnology, School of Science, Tallinn University of Technology, Akadeemia tee 15, 12618 Tallinn, Estonia
| | - Margus Lopp
- Department of Chemistry and Biotechnology, School of Science, Tallinn University of Technology, Akadeemia tee 15, 12618 Tallinn, Estonia
| | - Arvi Jõers
- Institute of Technology, University of Tartu, Nooruse 1, 50104 Tartu, Estonia
| | - Tõnis Kanger
- Department of Chemistry and Biotechnology, School of Science, Tallinn University of Technology, Akadeemia tee 15, 12618 Tallinn, Estonia
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Heinze RC, Heretsch P. Translation of a Polar Biogenesis Proposal into a Radical Synthetic Approach: Synthesis of Pleurocin A/Matsutakone and Pleurocin B. J Am Chem Soc 2019; 141:1222-1226. [DOI: 10.1021/jacs.8b13356] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Robert C. Heinze
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Takustraße 3, 14195 Berlin, Germany
| | - Philipp Heretsch
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Takustraße 3, 14195 Berlin, Germany
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Wang CY, Wang KL, Qian PY, Xu Y, Chen M, Zheng JJ, Liu M, Shao CL, Wang CY. Antifouling phenyl ethers and other compounds from the invertebrates and their symbiotic fungi collected from the South China Sea. AMB Express 2016; 6:102. [PMID: 27785778 PMCID: PMC5081312 DOI: 10.1186/s13568-016-0272-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Accepted: 10/14/2016] [Indexed: 01/29/2023] Open
Abstract
Marine organism-derived secondary metabolites are promising potential sources for discovering environmentally safe antifouling agents. In present study, 55 marine secondary metabolites and their synthesized derivatives were tested and evaluated for their antifouling activities and security. These compounds include 44 natural products isolated from marine invertebrates and their symbiotic microorganisms collected from the South China Sea and 11 structural modified products derived from the isolated compounds. The natural secondary metabolites, covering phenyl ether derivatives, terpenoids, 9, 11-secosteroids, anthraquinones, alkaloids, nucleoside derivatives and peptides, were isolated from two corals, one sponge and five symbiotic fungi. All of the isolated and synthesized compounds were tested for their antifouling activities against the cyprids of barnacle Balanus (Amphibalanus) amphitrite Darwin. Noticeably, five phenyl ether derivatives (9, 11, 13-15) exhibited potent anti-larval settlement activity with the EC50 values lower than 3.05 μM and the LC50/EC50 ratios higher than 15. The study of structure-activity relationship (SAR) revealed that the introduction of acetoxy groups and bromine atoms to phenyl ether derivatives could significantly improve their antifouling activities. This is the first report on the SAR of phenyl ether derivatives on antifouling activity against barnacle B. amphitrite. The polybrominated diphenyl ether derivative, 2, 4, 6, 2', 4', 6'-hexabromo-diorcinol (13), which displayed excellent antifouling activity, was considered as a promising candidate of environmentally friendly antifouling agents.
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Affiliation(s)
- Chao-Yi Wang
- Key Laboratory of Marine Drugs, School of Medicine and Pharmacy, The Ministry of Education of China, Ocean University of China, 5 Yushan Road, Qingdao, 266003 People’s Republic of China
- Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071 People’s Republic of China
| | - Kai-Ling Wang
- Key Laboratory of Marine Drugs, School of Medicine and Pharmacy, The Ministry of Education of China, Ocean University of China, 5 Yushan Road, Qingdao, 266003 People’s Republic of China
- Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071 People’s Republic of China
- College of Life Science, Shenzhen University, 3688 Nanhai Ave, Shenzhen, 518060 People’s Republic of China
| | - Pei-Yuan Qian
- KAUST Global Collaborative Research, Division of Life Science, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, People’s Republic of China
| | - Ying Xu
- College of Life Science, Shenzhen University, 3688 Nanhai Ave, Shenzhen, 518060 People’s Republic of China
| | - Min Chen
- Key Laboratory of Marine Drugs, School of Medicine and Pharmacy, The Ministry of Education of China, Ocean University of China, 5 Yushan Road, Qingdao, 266003 People’s Republic of China
- Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071 People’s Republic of China
| | - Juan-Juan Zheng
- Key Laboratory of Marine Drugs, School of Medicine and Pharmacy, The Ministry of Education of China, Ocean University of China, 5 Yushan Road, Qingdao, 266003 People’s Republic of China
- Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071 People’s Republic of China
| | - Min Liu
- Key Laboratory of Marine Drugs, School of Medicine and Pharmacy, The Ministry of Education of China, Ocean University of China, 5 Yushan Road, Qingdao, 266003 People’s Republic of China
- Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071 People’s Republic of China
| | - Chang-Lun Shao
- Key Laboratory of Marine Drugs, School of Medicine and Pharmacy, The Ministry of Education of China, Ocean University of China, 5 Yushan Road, Qingdao, 266003 People’s Republic of China
- Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071 People’s Republic of China
| | - Chang-Yun Wang
- Key Laboratory of Marine Drugs, School of Medicine and Pharmacy, The Ministry of Education of China, Ocean University of China, 5 Yushan Road, Qingdao, 266003 People’s Republic of China
- Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071 People’s Republic of China
- Institute of Evolution and Marine Biodiversity, Ocean University of China, Qingdao, 266003 People’s Republic of China
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Zhang J, Liu LL, Zhong BL, Liao XJ, Xu SH. 9,11-Secosteroids with cytotoxic activity from the South China Sea gorgonian coral Subergorgia suberosa. Steroids 2015; 98:100-6. [PMID: 25796549 DOI: 10.1016/j.steroids.2015.03.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2014] [Revised: 01/24/2015] [Accepted: 03/10/2015] [Indexed: 11/18/2022]
Abstract
Nine new 9,11-secosterols (1-9), containing the same 3β,6α,11-trihydroxy-9,11-seco-5α-cholest-7-en-9-one steroidal nucleus, whereas possessing an array of structurally diverse side chains, along with fourteen known 9,11-secosterol compounds (10-23), were isolated from the South China Sea gorgonian coral Subergorgia suberosa, of which 3/4, 5/6, 7/8, and the known compounds 11/12, 20/21 were five pairs of inseparable C-24 epimers. Their structures were established by the extensive analyses of 1D and 2D NMR spectra, high-resolution chemical ionization mass spectrometry (HRCIMS), and by the comparison with literature data. Cytotoxic effect of these metabolites against the growth of HeLa cell lines was evaluated. The result showed that the inhibitory effect of compounds 1-23 varied considerably depending on the nature of the side chain in spite of sharing the same steroidal nucleus. Compound 19, featuring both the absence of hydroxyl group and the presence of double bond in the stigmasterol side chain, exhibited the most potent cytotoxicity with IC50 being 15.1 μM. The preliminary structure activity relationship studies identified some important structural features considerably influencing the biological effect deserved, providing valuable information for chemists and pharmacologists to design and synthesize more effective antitumor agents bearing the 9,11-secosteroid framework.
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Affiliation(s)
- Jun Zhang
- College of Pharmacy, Jinan University, Guangzhou 510632, PR China; National Engineering Research Centre of Navel Orange, Gannan Normal University, Ganzhou 341000, PR China
| | - Ling-Li Liu
- Division of Life Science, School of Science, The Hong Kong University of Science and Technology, Hong Kong Special Administrative Region
| | - Ba-Lian Zhong
- National Engineering Research Centre of Navel Orange, Gannan Normal University, Ganzhou 341000, PR China
| | - Xiao-Jian Liao
- Department of Chemistry, Jinan University, Guangzhou 510632, PR China
| | - Shi-Hai Xu
- College of Pharmacy, Jinan University, Guangzhou 510632, PR China; Department of Chemistry, Jinan University, Guangzhou 510632, PR China.
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Liu M, Shao CL, Chen M, Qi J, Wang Y, Fang YC, Wang CY. Bioactive 9,11-secosteroids from Gorgonian Subergorgia suberosa collected from the South China sea. Chem Biodivers 2015; 11:1109-20. [PMID: 25044596 DOI: 10.1002/cbdv.201400021] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Indexed: 11/07/2022]
Abstract
Five new 9,11-secosteroids 1, 2, and 4-6, and seven known analogs, 3 and 7-12, with the same steroid skeleton, (5αH)-3β,6α,11-trihydroxy-9,11-secocholest-7-en-9-one, were isolated from the South China Sea gorgonian Subergorgia suberosa. Among them, 2/3 and 4/5 are C(24)-epimeric mixtures, and 6/7 is an (E)/(Z) mixture of (C(24)C(28)). Their structures and relative configurations were elucidated by using comprehensive spectroscopic methods including NOESY spectra. The absolute configuration of the steroidal nucleus was established by the modified Mosher method applied to 10 and on the basis of a common biogenesis for all of these compounds. All isolated compounds, 1-12, and five synthetic acetylated derivatives, 12a-12e, were evaluated for their cytotoxicities in vitro. Compounds 4/5, 11, 12, and 12b-12d showed cytotoxic activities against K562 cell line with the IC50 values ranging from 1.09 to 8.12 μM.
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Affiliation(s)
- Min Liu
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, P. R. China, (phone/fax: +86-532-82031536)
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Abstract
This review describes the isolation from marine organisms of all secosteroids reported in the literature from 1972 to 2004. Secosteroids are highly oxidized metabolites with bond cleavage in the rings of the steroid tetracyclic nucleus. All secosteroids are grouped in accordance with their ring joined to side chain as 5,6-, 9,11-, 9,10- 8,9-, 8,14- and 13,17-secosteroids and the structures and the synthetic works, where available, are reported. Furthermore, this review gives details on the biological activities of the isolated secosteroids (e.g. antiproliferative, antifouling, antiinflammatory, antimicrobial, ichthyotoxic and antiviral).
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Affiliation(s)
- Donato Sica
- Dipartimento di Chimica Organica e Biochimica, Università degli Studi di Napoli Federico II, Complesso Universitario Monte Sant'Angelo, Via Cinthia, I-80126 Napoli, Italy.
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Vallikivi I, Lille Ü, Lookene A, Metsala A, Sikk P, Tõugu V, Vija H, Villo L, Parve O. Lipase action on some non-triglyceride substrates. ACTA ACUST UNITED AC 2003. [DOI: 10.1016/s1381-1177(03)00043-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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