Kinetic Resolution of β-Sulfonyl Ketones through Enantioselective β-Elimination using a Cation-Binding Polyether Catalyst
作者:Liang Li、Yidong Liu、Yang Peng、Lei Yu、Xiaoyan Wu、Hailong Yan
DOI:10.1002/anie.201508127
日期:2016.1.4
Reported herein is the first enantioselective β‐elimination reaction catalyzed by a chiral cation‐binding polyether. By using this catalytic protocol, a wide range of β‐sulfonyl ketones could be effectively resolved with high stereoselectivity (S up to >300). Key to the success of this process is the favorable secondary interactions of the catalyst with the Lewis basic groups on the sulfone substrate
本文报道的是手性阳离子结合聚醚催化的第一个对映选择性β-消除反应。通过使用这种催化方案,可以以高的立体选择性(S高达> 300)有效地分离各种β-磺酰基酮。该方法成功的关键是催化剂与砜基质上的路易斯碱性基团之间有利的二次相互作用。该方法的烯酮产物可轻松转化为外消旋原料,并可以高收率和出色的对映选择性有效地循环利用和全面合成手性β-磺酰基酮。