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Cheng MJ, Zhong LP, Gu CC, Zhu XJ, Chen B, Liu JS, Wang L, Ye WC, Li CC. Asymmetric Total Synthesis of Bufospirostenin A. J Am Chem Soc 2020; 142:12602-12607. [PMID: 32658467 DOI: 10.1021/jacs.0c05479] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The first and asymmetric total synthesis of bioactive bufospirostenin A, an unusual spirostanol with rearranged A/B rings, was accomplished. The synthetically challenging [5-7-6-5] tetracyclic ring system, found in bufospirostenin A and some other natural products, was efficiently constructed by the unique intramolecular rhodium-catalyzed Pauson-Khand reaction of an alkoxyallene-yne. The 11 stereocenters in the final product, including the 10 contiguous stereocenters, were installed diastereoselectively.
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Affiliation(s)
- Min-Jing Cheng
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, China.,Shenzhen Grubbs Institute, Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Li-Ping Zhong
- Shenzhen Grubbs Institute, Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Chen-Chen Gu
- Shenzhen Grubbs Institute, Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Xu-Jiang Zhu
- Shenzhen Grubbs Institute, Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Bo Chen
- Shenzhen Grubbs Institute, Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Jun-Shan Liu
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, China
| | - Lei Wang
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Wen-Cai Ye
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Chuang-Chuang Li
- Shenzhen Grubbs Institute, Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
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Inomata K, Akahane Y, Miura A. Alternative Chiral Preparations of a Swaminathan Ketone via Asymmetric Aldol Reactions Mediated by Chiral Amines Bearing a Pyrrolidine. HETEROCYCLES 2020. [DOI: 10.3987/com-19-14124] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Nadirova MА, Pokazeev KM, Kolesnik IА, Dorovatovskii PV, Bumagin NА, Potkin VI. Synthesis and Structure of Esterification Products of 6-aryl-1,2,3,6,7,7a-hexahydro-3а,6-epoxyisoindole-7-carboxylic Acids. Chem Heterocycl Compd (N Y) 2019. [DOI: 10.1007/s10593-019-02528-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Abstract
Starting from ( R)-seudenol, an asymmetric synthesis of the DEFG rings of solanoeclepin A has been developed. The key transformations include the substrate-controlled asymmetric Staudinger ketene cycloaddition and the intramolecular aldol reaction leading to the tricyclo[5.2.1.01,6]decane core of solanoeclepin A in 10 steps in the longest reaction sequence.
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Affiliation(s)
- Mao Sun
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences , Chongqing University , 55 Daxuecheng South Road , Shapingba, 401331 Chongqing , China.,Guangzhou Institute of Biomedicine and Health , The University of the Chinese Academy of Sciences , 190 Kaiyuan Avenue, The Science Park of Guangzhou , Guangzhou , Guangdong 510530 , China
| | - Wei-Dong Z Li
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences , Chongqing University , 55 Daxuecheng South Road , Shapingba, 401331 Chongqing , China
| | - Fayang G Qiu
- Guangzhou Institute of Biomedicine and Health , The University of the Chinese Academy of Sciences , 190 Kaiyuan Avenue, The Science Park of Guangzhou , Guangzhou , Guangdong 510530 , China
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Hu YJ, Fan JH, Li S, Zhao J, Li CC. Synthetic Study toward the Total Synthesis of Taxezopidines A and B. Org Lett 2018; 20:5905-5909. [PMID: 30192554 DOI: 10.1021/acs.orglett.8b02571] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A concise synthetic approach to construct the [6,8,6]-tricyclic core of taxezopidines A and B, which contains a synthetically challenging bridged bicyclo[5.3.1]undecane ring system bearing most of the desired functionalized groups and stereocenters, has been established. This approach features a diastereoselective type II intramolecular Diels-Alder furan reaction. The stereochemistry of the acetoxy group at the allylic position of the dienophile alkene group, such as in 6a, was found to be critical for achieving the desired highly diastereoselective outcome.
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Affiliation(s)
- Ya-Jian Hu
- Institute of Chinese Medical Sciences , University of Macau , Macau 999078 , China.,Department of Chemistry and Shenzhen Grubbs Institute , Southern University of Science and Technology , Shenzhen 518055 , China
| | - Jian-Hong Fan
- Institute of Chinese Medical Sciences , University of Macau , Macau 999078 , China.,Department of Chemistry and Shenzhen Grubbs Institute , Southern University of Science and Technology , Shenzhen 518055 , China
| | - Shaoping Li
- Institute of Chinese Medical Sciences , University of Macau , Macau 999078 , China
| | - Jing Zhao
- Institute of Chinese Medical Sciences , University of Macau , Macau 999078 , China
| | - Chuang-Chuang Li
- Department of Chemistry and Shenzhen Grubbs Institute , Southern University of Science and Technology , Shenzhen 518055 , China
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