Bifunctional Thiourea–Ammonium Salt Catalysts Derived from Cinchona Alkaloids: Cooperative Phase-Transfer Catalysts in the Enantioselective Aza-Henry Reaction of Ketimines
作者:Ning Lu、Yanhong Fang、Yuan Gao、Zhonglin Wei、Jungang Cao、Dapeng Liang、Yingjie Lin、Haifeng Duan
DOI:10.1021/acs.joc.7b03078
日期:2018.2.2
An efficient enantioselective aza-Henry reaction of aryl α-ketoester-derived ketimines has been realized by using bifunctional thiourea–ammonium salt phase-transfer catalysts, which were derived from quinine. A variety of aryl α-ketoester-derived N-Ts ketimines were investigated, and the corresponding products were obtained in high to excellent yields (up to 99%) with good to high enantioselectivities
通过使用衍生自奎宁的双官能硫脲-铵盐相转移催化剂,已经实现了芳基α-酮酯衍生的酮亚胺的有效对映选择性aza-Henry反应。研究了多种衍生自芳基α-酮酸酯的N - Ts酮亚胺,并以高至优异的收率(高达99%)和良好至高的对映选择性(高达> 99%ee)获得了相应的产物。