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Campbell A, Som IM, Wilson C, Clark JS. Total Syntheses of 11-Acetoxy-4-deoxyasbestinin D, 4-Deoxyasbestinin C, Asbestinin-10, -20, -21 and -23. Chemistry 2020; 26:1155-1160. [PMID: 31710141 PMCID: PMC7027880 DOI: 10.1002/chem.201904998] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Indexed: 11/30/2022]
Abstract
Six members of the asbestinin family of marine diterpene natural products have been synthesized in an efficient and stereoselective manner from a single oxa‐bridged intermediate. Five of these natural products have not been synthesized previously and the structures of four of them have been confirmed as those proposed originally or following revisions to the original structures. The fifth natural product—asbestinin‐21—has been shown to be a diastereomer of the compound that had been proposed previously.
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Affiliation(s)
- Angus Campbell
- School of Chemistry, Joseph Black Building, University of Glasgow, University Avenue, Glasgow, G12 8QQ, UK
| | - Ian Mat Som
- School of Chemistry, Joseph Black Building, University of Glasgow, University Avenue, Glasgow, G12 8QQ, UK
| | - Claire Wilson
- School of Chemistry, Joseph Black Building, University of Glasgow, University Avenue, Glasgow, G12 8QQ, UK
| | - J Stephen Clark
- School of Chemistry, Joseph Black Building, University of Glasgow, University Avenue, Glasgow, G12 8QQ, UK
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Welford AJ, Caldwell JJ, Liu M, Richards M, Brown N, Lomas C, Tizzard GJ, Pitak MB, Coles SJ, Eccles SA, Raynaud FI, Collins I. Synthesis and Evaluation of a 2,11-Cembranoid-Inspired Library. Chemistry 2016; 22:5657-64. [PMID: 26929153 PMCID: PMC4869678 DOI: 10.1002/chem.201505093] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Indexed: 01/22/2023]
Abstract
The 2,11-cembranoid family of natural products has been used as inspiration for the synthesis of a structurally simplified, functionally diverse library of octahydroisobenzofuran-based compounds designed to augment a typical medicinal chemistry library screen. Ring-closing metathesis, lactonisation and SmI2 -mediated methods were exemplified and applied to the installation of a third ring to mimic the nine-membered ring of the 2,11-cembranoids. The library was assessed for aqueous solubility and permeability, with a chemical-space analysis performed for comparison to the family of cembranoid natural products and a sample set of a screening library. Preliminary investigations in cancer cells showed that the simpler scaffolds could recapitulate the reported anti-migratory activity of the natural products.
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Affiliation(s)
- Amanda J Welford
- Division of Cancer Therapeutics, The Institute of Cancer Research, London, SM2 5NG, UK
| | - John J Caldwell
- Division of Cancer Therapeutics, The Institute of Cancer Research, London, SM2 5NG, UK.
| | - Manjuan Liu
- Division of Cancer Therapeutics, The Institute of Cancer Research, London, SM2 5NG, UK
| | - Meirion Richards
- Division of Cancer Therapeutics, The Institute of Cancer Research, London, SM2 5NG, UK
| | - Nathan Brown
- Division of Cancer Therapeutics, The Institute of Cancer Research, London, SM2 5NG, UK
| | - Cara Lomas
- Division of Cancer Therapeutics, The Institute of Cancer Research, London, SM2 5NG, UK
| | - Graham J Tizzard
- UK National Crystallography Service, University of Southampton, Southampton, SO17 1BJ, UK
| | - Mateusz B Pitak
- UK National Crystallography Service, University of Southampton, Southampton, SO17 1BJ, UK
| | - Simon J Coles
- UK National Crystallography Service, University of Southampton, Southampton, SO17 1BJ, UK
| | - Suzanne A Eccles
- Division of Cancer Therapeutics, The Institute of Cancer Research, London, SM2 5NG, UK
| | - Florence I Raynaud
- Division of Cancer Therapeutics, The Institute of Cancer Research, London, SM2 5NG, UK
| | - Ian Collins
- Division of Cancer Therapeutics, The Institute of Cancer Research, London, SM2 5NG, UK
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Pflästerer D, Hashmi ASK. Gold catalysis in total synthesis – recent achievements. Chem Soc Rev 2016; 45:1331-67. [DOI: 10.1039/c5cs00721f] [Citation(s) in RCA: 600] [Impact Index Per Article: 75.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The most recent achievements of gold catalysed transformations applied in total synthesis of natural products are reviewed and analysed.
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Affiliation(s)
- Daniel Pflästerer
- Organisch-Chemisches Institut
- Universität Heidelberg
- 69120 Heidelberg
- Germany
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Clark JS, Delion L, Farrugia LJ. Synthesis of four diastereomers of sclerophytin F and structural reassignment of several sclerophytin natural products. Chemistry 2015; 21:4772-80. [PMID: 25663662 DOI: 10.1002/chem.201406051] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Indexed: 11/09/2022]
Abstract
Synthesis of the triol that has been proposed to be the marine natural product sclerophytin F has been completed along with the syntheses of three diastereomers. Comparison of the NMR spectroscopic data for all four compounds to the data reported for the natural product reveals that sclerophytin F is not the 3S diastereomer of sclerophytin A as proposed by Friedrich and Paquette. Re-analysis of the NMR spectroscopic data for known sclerophytin natural products and synthetic analogues leads to the conclusion that sclerophytins E and F are the same compound. This finding has allowed structural reassignment of several other cladiellin natural products.
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Affiliation(s)
- J Stephen Clark
- WestCHEM, School of Chemistry, Joseph Black Building, University of Glasgow, University Avenue, Glasgow G12 8QQ (UK).
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Fu J, Shen H, Chang Y, Li C, Gong J, Yang Z. Concise Stereoselective Synthesis of Oxaspirocycles with 1-Tosyl-1,2,3-triazoles: Application to the Total Syntheses of (±)-Tuberostemospiroline and (±)-Stemona-lactam R. Chemistry 2014; 20:12881-8. [DOI: 10.1002/chem.201403756] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Indexed: 01/16/2023]
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Clark JS, Hansen KE. Intramolecular Reactions of Metal Carbenoids with Allylic Ethers: Is a Free Ylide Involved in Every Case? Chemistry 2014; 20:5454-9. [DOI: 10.1002/chem.201304054] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2013] [Indexed: 11/09/2022]
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Clark JS, Romiti F. Total Syntheses of Amphidinolides T1, T3, and T4. Angew Chem Int Ed Engl 2013; 52:10072-5. [DOI: 10.1002/anie.201305467] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2013] [Indexed: 11/05/2022]
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Fu J, Shang H, Wang Z, Chang L, Shao W, Yang Z, Tang Y. Gold-Catalyzed Rearrangement of Allylic Oxonium Ylides: Efficient Synthesis of Highly Functionalized Dihydrofuran-3-ones. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201208305] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Fu J, Shang H, Wang Z, Chang L, Shao W, Yang Z, Tang Y. Gold-catalyzed rearrangement of allylic oxonium ylides: efficient synthesis of highly functionalized dihydrofuran-3-ones. Angew Chem Int Ed Engl 2013; 52:4198-202. [PMID: 23468251 DOI: 10.1002/anie.201208305] [Citation(s) in RCA: 91] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2012] [Revised: 11/30/2012] [Indexed: 11/11/2022]
Affiliation(s)
- Junkai Fu
- Laboratory of Chemical Genomics, Peking University, Shenzhen Graduate School, Xili, Nanshan District, Shenzhen 518055, China
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