Organocatalytic Enantioselective Amination of 2-Substituted Indolin-3-ones: A Strategy for the Synthesis of Chiral α-Hydrazino Esters
作者:Suresh Yarlagadda、B. Ramesh、C. Ravikumar Reddy、L. Srinivas、B. Sridhar、B. V. Subba Reddy
DOI:10.1021/acs.orglett.6b03473
日期:2017.1.6
An efficient enantioselective α-amination of 2-substituted 3-indolinones has been achieved for the first time using hydroquinidine as a chiral catalyst through an aza-Michael reaction. The desired α-hydrazino esters are obtained in excellent yields with high enantiomeric excess leading to a quaternary stereocenter with a broad substrate scope.
使用氢奎尼丁作为手性催化剂,通过氮杂-迈克尔反应,首次实现了对2-取代的3-吲哚满酮的有效对映选择性α-氨基化反应。以优异的产率获得了所需的α-肼基酯,其中高的对映异构体过量导致了具有宽底物范围的季立体中心。