The First Highly Enantioselective Lewis Base Organocatalyzed Hydrosilylation of α-Imino Esters
作者:Zhou-Yang Xue、Yan Jiang、Wei-Cheng Yuan、Xiao-Mei Zhang
DOI:10.1002/ejoc.200901312
日期:2010.2
Novel, chiral Lewis base organocatalysts, which displayed poor enantioselection in the hydrosilylation of N-aryl β-enamino esters, were found to be the catalysts of choice in the hydrosilylation of α-imino esters. In the presence of 10 mol-% of the best catalyst, various α-imino esters underwent enantioselective hydrosilylation to provide a wide range of chiral α-amino esters with good yields (up to
新的手性路易斯碱有机催化剂在 N-芳基 β-烯氨基酯的氢化硅烷化中显示出较差的对映选择性,被发现是 α-亚氨基酯氢化硅烷化的首选催化剂。在 10 mol% 的最佳催化剂存在下,各种 α-亚氨基酯进行对映选择性氢化硅烷化,以提供范围广泛的手性 α-氨基酯,具有良好的产率(高达 97 %)和高对映选择性(高达 93 % ee ) 一些特殊基材除外。