Total Synthesis of (−)-α-Kainic Acid by (−)-Sparteine-Mediated Asymmetric Deprotonation−Cycloalkylation
作者:M. Montserrat Martinez、Dieter Hoppe
DOI:10.1021/ol0485666
日期:2004.10.1
[reaction: see text] We report a new enantioselective synthesis of (-)-alpha-kainic acid from d-serine methyl ester hydrochloride, based on a (-)-sparteine-mediated asymmetric deprotonation of an intermediate carbamate that, by stereospecific anti S(N)'S(E)' intramolecular cycloalkylation, leads to the pyrrolidine ring precursor of (-)-alpha-kainic acid, in high yield and diastereoselectivity. The