Cinchona-based primary amine-catalyzed enantioselective aza-Michael reactions of pyrroles with α,β-unsaturated aldehydes
作者:Su-Jeong Lee、Jun-Gi Ahn、Chang-Woo Cho
DOI:10.1016/j.tetasy.2014.09.002
日期:2014.10
The cinchona-based primary amine-catalyzed enantioselective aza-Michael reaction of alpha,beta-unsaturated aldehydes with 4,5-dihalo-1H-pyrrole-2-carbonitriles as the N-centered heteroaromatic nucleophile, followed by chemoselective reduction provided the corresponding chiral aza-Michael products in good yields and with excellent enantioselectivities (90-97% ee). (C) 2014 Elsevier Ltd. All rights reserved.