Microwave activation of an asymmetric Michael reaction: unexpected behaviour of chiral α-alkoxy imines
作者:Cheikhou Camara、Laurent Keller、Françoise Dumas
DOI:10.1016/s0957-4166(03)00573-1
日期:2003.10
While it has been previously established that chiral alpha-alkoxy imines undergo thermal rearrangement at temperatures above 50degreesC, the microwave activation of the Michael addition between chiral imine 3b and methyl acrylate at 100degreesC led cleanly to the corresponding Michael adduct 5b without the formation of any rearranged product and with the same regio- and stereoselectivity as the corresponding thermal condensation at 40degreesC (ee 95%). (C) 2003 Elsevier Ltd. All rights reserved.