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Wu K, Kang K, Liu D, Zhang C, Wang X, Zhang M, Li Q. Gold-catalyzed endo-selective Ring-opening of Epoxides and its Application in Construction of Poly-ethers. Chemistry 2024; 30:e202400234. [PMID: 38273816 DOI: 10.1002/chem.202400234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Accepted: 01/23/2024] [Indexed: 01/27/2024]
Abstract
Tetrahydropyran and tetrahydropyran-fused poly-ethers scaffolds are found in many classes of natural products and medicinally relevant small molecules. Here we describe a catalytic system for 6-endo selective ring-opening of epoxides by Au(I) or Au(III) catalyst that provides rapid access to various tetrahydropyran-derived motifs. It also could efficiently construct the subunits of marine ladder-like poly-ethers through emulating the Nakanishi's hypothesis on the biosynthesis of these toxins. The synthetic utility of this method is also demonstrated in the preparation of the tricyclic core of tetrahydropyran-containing macrolide natural products lituarines A-C.
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Affiliation(s)
- Kehuan Wu
- Small-Molecule Drug Research Center, Shanghai Institute of Materia Medica, Chinese Academy of Science, Shanghai, 201203, China
| | - Kaiwen Kang
- Small-Molecule Drug Research Center, Shanghai Institute of Materia Medica, Chinese Academy of Science, Shanghai, 201203, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Dan Liu
- School of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Chiyue Zhang
- School of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Xinyu Wang
- School of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Miaocheng Zhang
- Small-Molecule Drug Research Center, Shanghai Institute of Materia Medica, Chinese Academy of Science, Shanghai, 201203, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Qi Li
- School of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing, 210023, China
- Small-Molecule Drug Research Center, Shanghai Institute of Materia Medica, Chinese Academy of Science, Shanghai, 201203, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
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Nishikawa K, Teranishi T, Tsuruta T, Niwa T, Morita K, Hashimoto S, Hoshino A, Kumagai M, Morimoto Y. Establishment of "Ring-Size-Divergent" Synthetic Strategy: Divergent Synthesis, Stereochemical Assignments, and Biological Activity Studies of Nerolidol-Type Sesquiterpenoids and Feroniellins. J Org Chem 2023; 88:15844-15861. [PMID: 37924303 DOI: 10.1021/acs.joc.3c01913] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2023]
Abstract
Biomimetic epoxide-opening cascade cyclizations of polyepoxides enable the efficient and rapid construction of polyether skeletons. In this study, we discovered a method for switching the cyclization mode from tetrahydrofuran to tetrahydropyran (THP) formation in epoxide-opening cascades of polyepoxides. The THP formation proceeded via an epoxonium-ion intermediate by simple heating in neutral water. Next, by expanding the switching reaction, we successfully established a "ring-size-divergent" synthetic strategy that enabled the synthesis of the five-, six-, and seven-membered ether rings from identical diepoxide cyclization precursors under simple acidic or neutral conditions. The "ring-size-divergent" synthetic strategy was applied to the short divergent synthesis of nerolidol-type sesquiterpenoids and feroniellins, resulting in the revision of the proposed stereochemistry of certain natural products and the determination of all of the absolute configurations. Additionally, the anti-inflammatory activities of the synthetic samples were evaluated.
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Affiliation(s)
- Keisuke Nishikawa
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Tomonori Teranishi
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Tomoki Tsuruta
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Toshiki Niwa
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Kengo Morita
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Subaru Hashimoto
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Akihiro Hoshino
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Momochika Kumagai
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, Sumiyoshi-ku, Osaka 558-8585, Japan
- Faculty of Fisheries, Kagoshima University, Shimoarata, Kagoshima 890-0056, Japan
| | - Yoshiki Morimoto
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, Sumiyoshi-ku, Osaka 558-8585, Japan
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