Squaramide–Tertiary Amine Catalyzed Asymmetric Cascade Sulfa-Michael/Michael Addition via Dynamic Kinetic Resolution: Access to Highly Functionalized Chromans with Three Contiguous Stereocenters
作者:Wen Yang、Yi Yang、Da-Ming Du
DOI:10.1021/ol400025a
日期:2013.3.15
An efficient asymmetric cascade sulfa-Michael/Michael addition reaction catalyzed by a chiral bifunctional squaramide–tertiary amine catalyst has been developed. This organocatalytic cascade reaction provides easy access to highly functionalized chromans with three contiguous stereocenters, including one quaternary center. In addition, a novel cascade sulfa Michael/retro-sulfa-Michael/sulfa-Michael/Michael
已经开发了一种有效的不对称级联磺胺-迈克尔/迈克尔加成反应,该反应由手性双官能方酰胺-叔胺催化剂催化。这种有机催化的级联反应可轻松获得具有三个连续立体中心(包括一个四级中心)的高度官能化的苯并二氢吡喃。另外,描述了涉及动态动力学拆分的新颖的级联磺胺迈克尔/反磺胺迈克尔/磺胺迈克尔/迈克尔反应过程。