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Yin JJ, Wang YP, Xue J, Zhou FF, Shan XQ, Zhu R, Fang K, Shi L, Zhang SY, Hou SH, Xia W, Tu YQ. Total Syntheses of Polycyclic Diterpenes Phomopsene, Methyl Phomopsenonate, and iso-Phomopsene via Reorganization of C-C Single Bonds. J Am Chem Soc 2023; 145:21170-21175. [PMID: 37605370 DOI: 10.1021/jacs.3c07044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/23/2023]
Abstract
The first total syntheses of polycyclic diterpenes phomopsene (1), methyl phomopsenonate (2), and iso-phomopsene (3) have been accomplished through the unusual cascade reorganization of C-C single bonds. This approach features: (i) a synergistic Nazarov cyclization/double ring expansions in one-step, developed by authors, to rapid and stereospecific construction of the 5/5/5/5 tetraquinane scaffold bearing contiguous quaternary centers and (ii) a one-pot strategic ring expansion through Beckmann fragmentation/recombination to efficiently assemble the requisite 5/5/6/5 tetracyclic skeleton of the target molecules 1-3. This work enables us to determine that the correct structure of iso-phomopsene is, in fact, the C7 epimer of the originally assigned structure. Finally, the absolute configurations of three target molecules were confirmed through enantioselective synthesis.
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Affiliation(s)
- Jun-Jie Yin
- School of Science (Shenzhen), School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Yun-Peng Wang
- School of Chemistry and Chemical Engineering, College of Pharmaceutical Sciences, Frontier Scientific Center of Transformative Molecules, Shanghai key Laboratory of Chiral Drugs and Engineering, Shanghai Jiao Tong University, Shanghai, Minhang 200240, China
| | - Jun Xue
- School of Chemistry and Chemical Engineering, College of Pharmaceutical Sciences, Frontier Scientific Center of Transformative Molecules, Shanghai key Laboratory of Chiral Drugs and Engineering, Shanghai Jiao Tong University, Shanghai, Minhang 200240, China
| | - Feng-Fan Zhou
- School of Chemistry and Chemical Engineering, College of Pharmaceutical Sciences, Frontier Scientific Center of Transformative Molecules, Shanghai key Laboratory of Chiral Drugs and Engineering, Shanghai Jiao Tong University, Shanghai, Minhang 200240, China
| | - Xing-Qian Shan
- School of Chemistry and Chemical Engineering, College of Pharmaceutical Sciences, Frontier Scientific Center of Transformative Molecules, Shanghai key Laboratory of Chiral Drugs and Engineering, Shanghai Jiao Tong University, Shanghai, Minhang 200240, China
| | - Rong Zhu
- School of Chemistry and Chemical Engineering, College of Pharmaceutical Sciences, Frontier Scientific Center of Transformative Molecules, Shanghai key Laboratory of Chiral Drugs and Engineering, Shanghai Jiao Tong University, Shanghai, Minhang 200240, China
| | - Kun Fang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Lei Shi
- School of Science (Shenzhen), School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Shu-Yu Zhang
- School of Chemistry and Chemical Engineering, College of Pharmaceutical Sciences, Frontier Scientific Center of Transformative Molecules, Shanghai key Laboratory of Chiral Drugs and Engineering, Shanghai Jiao Tong University, Shanghai, Minhang 200240, China
| | - Si-Hua Hou
- School of Chemistry and Chemical Engineering, College of Pharmaceutical Sciences, Frontier Scientific Center of Transformative Molecules, Shanghai key Laboratory of Chiral Drugs and Engineering, Shanghai Jiao Tong University, Shanghai, Minhang 200240, China
| | - Wujiong Xia
- School of Science (Shenzhen), School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Yong-Qiang Tu
- School of Chemistry and Chemical Engineering, College of Pharmaceutical Sciences, Frontier Scientific Center of Transformative Molecules, Shanghai key Laboratory of Chiral Drugs and Engineering, Shanghai Jiao Tong University, Shanghai, Minhang 200240, China
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
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Sun D, Chen R, Tang D, Xia Q, Zhao Y, Liu CH, Ding H. Total Synthesis of (-)-Retigeranic Acid A: A Reductive Skeletal Rearrangement Strategy. J Am Chem Soc 2023. [PMID: 37224289 DOI: 10.1021/jacs.3c03178] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The asymmetric total synthesis of (-)-retigeranic acid A was described, which relies on a crucial reductive skeletal rearrangement cascade for the controllable assembly of diverse angular triquinane subunits. Taken together with an intramolecular Michael/aldol cyclization, an ODI-[5 + 2] cycloaddition/pinacol rearrangement cascade, a Wolff ring contraction and a stereoselective HAT reduction, our synthetic approach has enabled the access to (-)-retigeranic acid A in a concise and practical manner.
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Affiliation(s)
- Dongyu Sun
- Department of Chemistry, Zhejiang University, Hangzhou 310058, China
| | - Ruyi Chen
- Department of Chemistry, Zhejiang University, Hangzhou 310058, China
| | - Dongmin Tang
- Department of Chemistry, Zhejiang University, Hangzhou 310058, China
| | - Qidong Xia
- College of Chemistry, Jilin University, Changchun 130012, China
| | - Yifan Zhao
- Department of Chemistry, Zhejiang University, Hangzhou 310058, China
| | - Chun-Hui Liu
- Department of Chemistry, Zhejiang University, Hangzhou 310058, China
| | - Hanfeng Ding
- Department of Chemistry, Zhejiang University, Hangzhou 310058, China
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Wang LN, Huang Z, Yu ZX. Synthesis of Polycyclic n/5/8 and n/5/5/5 Skeletons Using Rhodium-Catalyzed [5 + 2 + 1] Cycloaddition of Exocyclic-ene-vinylcyclopropanes and Carbon Monoxide. Org Lett 2023; 25:1732-1736. [PMID: 36881539 DOI: 10.1021/acs.orglett.3c00402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
Abstract
A rhodium-catalyzed [5 + 2 + 1] reaction of exocyclic-ene-vinylcyclopropanes (exo-ene-VCPs) and CO has been realized to access challenging tricyclic n/5/8 skeletons (n = 5, 6, 7), some of which are found in natural products. This reaction can be used to build tetracyclic n/5/5/5 skeletons (n = 5, 6), which are also found in natural products. In addition, 0.2 atm CO can be replaced by (CH2O)n as the CO surrogate to achieve the [5 + 2 + 1] reaction with similar efficiency.
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Affiliation(s)
- Lu-Ning Wang
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - Zhiqiang Huang
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - Zhi-Xiang Yu
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
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Zhao Y, Hu J, Chen R, Xiong F, Xie H, Ding H. Divergent Total Syntheses of (-)-Crinipellins Facilitated by a HAT-Initiated Dowd-Beckwith Rearrangement. J Am Chem Soc 2022; 144:2495-2500. [PMID: 35112847 DOI: 10.1021/jacs.1c13370] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
A hydrogen atom transfer (HAT)-initiated Dowd-Beckwith rearrangement reaction was developed, which enables the efficient assembly of diversely functionalized polyquinane frameworks. By incorporation of an iridium-catalyzed regio- and enantioselective hydrogenation and a diastereocontrolled ODI-[5+2] cycloaddition/pinacol rearrangement cascade reaction, the asymmetric total syntheses of eight tetraquinane natural products, including (-)-crinipellins A-F and (-)-dihydrocrinipellins A and B, have been achieved in a concise and divergent manner.
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Affiliation(s)
- Yifan Zhao
- Department of Chemistry, Zhejiang University, Hangzhou 310058, China
| | - Jialei Hu
- Center of Chemistry for Frontier Technologies, Department of Chemistry, Zhejiang University, Hangzhou 310058, China
| | - Ruyi Chen
- Center of Chemistry for Frontier Technologies, Department of Chemistry, Zhejiang University, Hangzhou 310058, China
| | - Fengping Xiong
- Department of Chemistry, Zhejiang University, Hangzhou 310058, China
| | - Hujun Xie
- Department of Applied Chemistry, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Hanfeng Ding
- Department of Chemistry, Zhejiang University, Hangzhou 310058, China.,Center of Chemistry for Frontier Technologies, Department of Chemistry, Zhejiang University, Hangzhou 310058, China
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