Chemoselective, accelerated and stereoselective aza-Michael addition of amines to N-phenylmaleimide by using TMEDA based receptors
作者:Yuefeng Bi、Laëtitia Bailly、Francis Marsais、Vincent Levacher、Cyril Papamicaël、Georges Dupas
DOI:10.1016/j.tetasy.2004.10.006
日期:2004.11
An aza-Michael addition between a maleimide and amines is described in which the presence of simple amine receptors (TMEDA or trans-TMCDA) promote the chemo selectivity of the reaction (respectively, 1,2- and 1,4-addition). Additionally, both receptors are able to accelerate the reaction. Stoichiometries of complexes between receptors and amines were determined by H-1 NMR dilution experiments while enantiomeric excesses were observed on 1,4-adducts by using (1R,2R)-TMCDA. (C) 2004 Elsevier Ltd. All rights reserved.