Dynamic resolution of α-halo chiral esters for the synthesis of 3-substituted piperazin-2-ones
作者:Jung In Jang、Seock Yong Kang、Kyoung Hee Kang、Yong Sun Park
DOI:10.1016/j.tet.2011.06.055
日期:2011.8
Dynamic resolution of α-halo esters derived from five chiral alcohols has been investigated in nucleophilic substitution with ethylenediamine nucleophiles. Stereoselective substitution of α-halo esters and following spontaneous cyclization provide a practical protocol for asymmetric syntheses of 3-substituted piperazin-2-ones up to 94:6 er.
在乙二胺亲核试剂的亲核取代中,已经研究了衍生自五种手性醇的α-卤代酯的动态拆分。α-卤代酯的立体选择性取代和自发环化后,可为不对称合成高达94:6 er的3-取代的哌嗪-2-酮提供实用的方案。