Organocatalytic and Electrophilic Approach to Oxindoles with C3-Quaternary Stereocenters
作者:Jing Peng、Xin Huang、Hai-Lei Cui、Ying-Chun Chen
DOI:10.1021/ol101668z
日期:2010.10.1
A Lewis base-catalyzed asymmetric allylic alkylation of Morita−Baylis−Hillman carbonates derived from isatins has been investigated, which provides an electrophilic pathway to access oxindoles bearing C3-quaternary stereocenters. Excellent diastereoselectivity and high enantioselectivity have been obtained in the vinylogous functionalization of α,α-dicyanoolefin nucleophiles, giving multifunctional
已经研究了路易斯从路易斯碱催化的衍生自靛红的Morita-Baylis-Hillman碳酸盐的不对称烯丙基烷基化反应,它提供了亲电途径来接触带有C3季立体中心的羟吲哚。在α,α-二氰基烯烃亲核体的乙烯基官能化中获得了优异的非对映选择性和高对映选择性,从而获得具有邻位季铵和叔手性碳中心的多功能产品。