A [3+3] cyclization strategy for asymmetric synthesis of alkyl substituted piperidine-2-ones using 1,2-cyclic sulfamidates: a formal synthesis of (S)-coniine from l-norvaline
作者:Abdullah Karanfil、Berrin Balta、Mustafa Eskici
DOI:10.1016/j.tet.2012.09.081
日期:2012.12
β-unsaturated esters after acidic hydrolysis. Hydrogenation of the unsaturated esters and subsequent thermal cyclization afforded the related alkyl substituted piperidine-2-ones. This approach represents a novel [3+3] cyclization strategy for the asymmetricsynthesis of alkyl substituted piperidin-2-ones. Efficiency of the cyclization process is illustrated by a formal asymmetricsynthesis of (S)-coniine from l-norvaline