A Versatile Preparation of α,β-Unsaturated Lactones from Homoallylic Alcohols
作者:Gary E. Keck、Xiang-Yi Li、Chad E. Knutson
DOI:10.1021/ol990632u
日期:1999.8.1
[formula: see text] A new method for the synthesis of alpha,beta-unsaturated lactones from beta-acetoxy aldehydes by reaction with the lithiumenolate of methyl acetate was developed. The reaction is relatively insensitive to structural changes in the aldehyde substrates. The process was extended to the synthesis of five-ring lactones from alpha-acetoxy aldehydes. Experimental evidence regarding the mechanism