Catalytic Asymmetric Direct Vinylogous Michael Addition of Deconjugated Butenolides to Maleimides for the Construction of Quaternary Stereogenic Centers
作者:Madhu Sudan Manna、Santanu Mukherjee
DOI:10.1002/chem.201203180
日期:2012.11.26
Competition under control: A practical and efficient direct asymmetric vinylogous Michael reaction of deconjugated butenolides has been developed (see scheme). The products of this reaction, highly functionalized chiral succinimides, are obtained in excellent yield with high diastereoselectivity (up to d.r.=18:1) and outstanding enantioselectivity (up to e.r.=99.5:0.5).
竞争得到控制:已开发了实用,有效的非共轭丁烯内酯直接不对称乙烯基迈克尔反应(请参阅方案)。该反应的产物,高度官能化的手性琥珀酰亚胺,以优异的收率获得,具有高的非对映选择性(高达dr = 18:1)和出色的对映选择性(高达er = 99.5:0.5)。