Alumina-promoted fast solid-phase Michael addition of enamines with conjugated enones under microwave irradiation
摘要:
A fast alumina-promoted solid-phase Michael addition of enamines to conjugated enones is described under microwave irradiation in high yields. The 1,5-diketo Michael adducts have been converted into a novel class of 1',2'-diazepino(17,16-d') steroids. (C) 2001 Elsevier Science Ltd. All rights reserved.
Highly enantioselective Michael addition of cyclic ketones to chalcones catalyzed by pyrrolidine-based imides
作者:Hong-Yu Xie、Shu-Rong Ban、Ju-Na Liu、Qing-Shan Li
DOI:10.1016/j.tetlet.2012.05.106
日期:2012.7
An efficient procedure for asymmetric Michaeladdition reaction of cyclic ketones with low activated chalcones catalyzed by pyrrolidine-based phthalimide and 1,8-Naphthalimide catalysts was developed. The corresponding products were obtained in high yields with high diastereoselectivities (up to 99:1 dr) and high enantioselectivities (up to 96% ee) under mild conditions.