Efficient assembly of α-methylene-γ-butyrolactones via a novel, tandem Claisen–ene rearrangement
作者:Cédric Leclercq、István E. Markó
DOI:10.1016/j.tetlet.2005.08.065
日期:2005.10
A novel method for the rapid assembly of alpha-methylene-gamma-butyrolactones, using a tandem Claisen-ene rearrangement as a key step, is presented. The importance of the structure of the Lewis acid promoters and the mechanism of action of Et2AlSPh are discussed. (c) 2005 Elsevier Ltd. All rights reserved.