Diastereodivergent Catalytic Asymmetric Michael Addition of 2-Oxindoles to α,β-Unsaturated Ketones by Chiral Diamine Catalysts
作者:Yuan Wei、Shigang Wen、Zunwu Liu、Xinxin Wu、Bubing Zeng、Jinxing Ye
DOI:10.1021/acs.orglett.5b01149
日期:2015.6.5
catalytic asymmetric Michael addition of 2-oxindoles to α,β-unsaturated ketones has been successfully developed with two complementary chiral diamine catalysts, affording chiral 3,3-disubstituted oxindoles with two adjacent chiral centers. Diastereodivergence has been realized through modifying substrates and utilizing different catalysts. Either anti-or syn-configured products possessing vicinal quaternary
用两种互补的手性二胺催化剂已成功开发了2-氧吲哚向α,β-不饱和酮的非对映异构催化2-迈克尔的迈克尔不对称加成反应,提供了具有两个相邻手性中心的手性3,3-二取代的羟吲哚。通过修饰底物并利用不同的催化剂已经实现了非对映异构。无论是反-或顺-构型的产品拥有邻季和第三分别具有高对映选择性产生手性中心。