Cu(I)-based chiral catalysts bearing binaphthyl-Proline hybrid ligands and their application in enantioselective Friedel-Crafts reactions of indoles with isatins
作者:Chao Wang、Zilin Jiao、Jiaqi Hou、Jiahui Li、Tianxu Yu、Shibo Yu、Qihang Cai、Chao Yao、Yue-Ming Li
DOI:10.1016/j.tet.2024.133868
日期:2024.3
Highly enantioselective Friedel-Crafts reactions of indoles with isatins were realized using chiral Cu(I) catalyst bearing BINOL and proline-based electronically and sterically tunable chiral O–N–N tridentate ligands. Such catalyst system showed excellent performance in enantioselective Friedel-Crafts alkylation of different indoles, and a series of 3-indolyl-3-hydroxyoxindoles were obtained in high
使用带有 BINOL 和基于脯氨酸的电子和空间可调手性 O-N-N 三齿配体的手性 Cu(I) 催化剂,实现了吲哚与靛红的高度对映选择性傅克反应。该催化剂体系在不同吲哚的对映选择性傅克烷基化反应中表现出优异的性能,在温和条件下以高收率(90-98%)和优异的对映选择性(82-98% ee)得到了一系列3-吲哚基-3-羟基吲哚。反应条件。