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Ujiie K, Tanaka C, Arai M, Hashimoto M, Yoshida Y, Kawano T, Tamura S. Proposal for structure revision of pinofuranoxin A through total syntheses of stereoisomers. J Nat Med 2024; 78:608-617. [PMID: 38587582 DOI: 10.1007/s11418-024-01810-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2024] [Accepted: 03/29/2024] [Indexed: 04/09/2024]
Abstract
The relative configuration of the epoxide functionality in pinofuranoxin A (1), α-alkylidene-β-hydroxy-γ-methyl-γ-butyrolactone with trans-epoxy side chain isolated by Evidente et al. in 2021, was revised by DFT-based spectral reinvestigations and stereo-controlled synthesis. The present investigation demonstrates the difficulty of the configurational elucidation of the stereogenic centers on the conformationally flexible acyclic side-chains. Sharpless's enantioselective epoxidations and dihydroxylations were quite effective in the reinvestigations of the configurations. As our syntheses made all diastereomers available, these would be quite effective in the next structure-biological activity relationship studies.
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Affiliation(s)
- Kazuki Ujiie
- Laboratory of Natural Products Chemistry, School of Pharmaceutical Sciences, Wakayama Medical University, 25-1 Shichibancho, Wakayama, 640-8156, Japan
| | - Chiaki Tanaka
- Laboratory of Natural Products Chemistry, School of Pharmaceutical Sciences, Wakayama Medical University, 25-1 Shichibancho, Wakayama, 640-8156, Japan
| | - Masayoshi Arai
- Laboratory of Natural Products for Drug Discovery, Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Masaru Hashimoto
- Department of Biochemistry and Molecular Biology, Faculty of Agriculture and Life Science, Hirosaki University, 3-Bunkyo-Cho, Hirosaki, 036-8561, Japan
| | - Yuki Yoshida
- Department of Medicinal and Organic Chemistry, School of Pharmacy, Iwate Medical University, 1-1-1 Idai-Dori, Yahaba-Cho, Shiwa-Gun, Iwate, 028-3694, Japan
| | - Tomikazu Kawano
- Department of Medicinal and Organic Chemistry, School of Pharmacy, Iwate Medical University, 1-1-1 Idai-Dori, Yahaba-Cho, Shiwa-Gun, Iwate, 028-3694, Japan
| | - Satoru Tamura
- Laboratory of Natural Products Chemistry, School of Pharmaceutical Sciences, Wakayama Medical University, 25-1 Shichibancho, Wakayama, 640-8156, Japan.
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Li X, Xu J, Li Y, Kramer S, Skrydstrup T, Lian Z. Silylcarboxylic Acids as Bifunctional Reagents: Application in Palladium‐Catalyzed External‐CO‐Free Carbonylative Cross‐Coupling Reactions. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000586] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Xiong Li
- Department of Dermatology State Key Laboratory of Biotherapy and Cancer Center West China Hospital and West China School of Pharmacy Sichuan University Chengdu 610041 People's Republic of China
| | - Jie Xu
- Department of Dermatology State Key Laboratory of Biotherapy and Cancer Center West China Hospital and West China School of Pharmacy Sichuan University Chengdu 610041 People's Republic of China
| | - Yue Li
- Department of Dermatology State Key Laboratory of Biotherapy and Cancer Center West China Hospital and West China School of Pharmacy Sichuan University Chengdu 610041 People's Republic of China
| | - Søren Kramer
- Department of Chemistry Technical University of Denmark 2800 Kgs. Lyngby Denmark
| | - Troels Skrydstrup
- Carbon Dioxide Activation Center Interdisciplinary Nanoscience Center (iNANO) and Department of Chemistry Aarhus University Gustav WiedsVej 14 8000 Aarhus C Denmark
| | - Zhong Lian
- Department of Dermatology State Key Laboratory of Biotherapy and Cancer Center West China Hospital and West China School of Pharmacy Sichuan University Chengdu 610041 People's Republic of China
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