Chou SSP, Huang JL. Studies toward the first stereoselective total synthesis of (±)-quinolizidine 195C and other transformations.
Molecules 2013;
18:8243-56. [PMID:
23857127 PMCID:
PMC6269906 DOI:
10.3390/molecules18078243]
[Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2013] [Revised: 07/02/2013] [Accepted: 07/03/2013] [Indexed: 11/16/2022] Open
Abstract
Starting from a thio-substituted 4-quinolizidinone, a series of C-6 alkylated derivatives with a trans C-6, C-9a relationship was synthesized. Further transformations led to the first stereoselective total synthesis of the structure proposed for (±)-quinolizidine 195C, the major alkaloid isolated from the skin extracts of the Madagascan frog Mantella betsileo. Since the spectral data of the synthetic and natural products differed significantly, the true structure of (±)-quinolizidine 195C remains uncertain.
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