Huang WW, Cheng JT, Hsiao WT, Chiou WH. Stereodivergent Synthesis of Alkaloid (±)-223A and (±)-6-
epi-223A via Rh-Catalyzed Hydroformylation Double Cyclization.
J Org Chem 2024;
89:5091-5097. [PMID:
38456271 PMCID:
PMC11002921 DOI:
10.1021/acs.joc.3c02366]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 02/21/2024] [Accepted: 02/26/2024] [Indexed: 03/09/2024]
Abstract
A stereodivergent approach toward total syntheses of Dendrobatid alkaloids 223A and 6-epi-223A is described. The approach features a concise construction of an indolizidine skeleton by Rh-catalyzed domino hydroformylation double cyclization and sequential stereocontrolled transformations such as reductive alkylation or anti-selective α-alkylation of the 5-oxoindolizidine. These stereoselective reactions afford the desired stereochemistry in the targets.
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