A highly enantioselective diphenylprolinol silyl ether‐mediated asymmetric Michael reaction of a variety of aldehydes and β‐substituted α‐cyano α,β‐unsaturated esters was developed. The organocatalytic conjugate addition provided synthetically useful chiral adducts possessing three consecutive stereocenters and suitably oriented functional handles that were readily transformed via a sequence of reductive‐cyclization
建立了高度对映体选择性的二苯基脯
氨醇甲
硅烷基醚介导的各种醛与β-取代的α-
氰基α,β-不饱和酯的不对称迈克尔反应。有机催化共轭物的加成提供了合成有用的手性加合物,具有三个连续的立体中心和适当定向的功能手柄,可通过一系列还原环化和随后的差向异构化轻松转化,以提供高收率的3,4,5-三取代
哌啶的单一异构体和出色的对映体纯度。