Wu JJ, Shi Y, Tian WS. Synthesis of the aglycon of aspafiliosides E and F based on cascade reactions.
Chem Commun (Camb) 2016;
52:1942-4. [DOI:
10.1039/c5cc08856a]
[Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, we describe an efficient synthesis of C17α-OH-tigogenin, which is the aglycon of aspafiliosides E and F. The synthesis features three cascade processes, which involve the iodo-lactonization of furostan-26-acid, a cascade hydrolysis/intramolecular SN2 process, and a cascade intramolecular redox-ketalization process.
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