A Regio- and Diastereoselective Intramolecular Nitrone Cycloaddition for Practical 3- and 2,3-Disubstituted Piperidine Synthesis from γ-Butyrolactone
作者:Benjamin E. Stephens、Fei Liu
DOI:10.1021/jo8018285
日期:2009.1.2
3-disubstituted piperidines, featuring an intramolecular nitronecycloaddition with high regio- and diastereoselectivity, was achieved in six steps and 36−66% overall yield from commercially available γ-butyrolactone or 1,4-butanediol. A new N-alkenyl nitrone enoate was used in this intramolecular nitronecycloaddition, and the regioselectivity, diastereoselectivity, and reversibility of this cycloaddition were