Carbonylation of Epoxides to Substituted 3-Hydroxy-δ-Lactones
作者:John W. Kramer、Daniel Y. Joh、Geoffrey W. Coates
DOI:10.1021/ol702475e
日期:2007.12.1
Substituted 3-hydroxy-delta-lactones (3HLs) are valuable intermediates in the synthesis of pharmaceuticals and other biologically active-natural products. Herein we report the first example of the catalytic carbonylation of substituted homoglycidols to 3HLs using HCo(CO)(4). Upon optimization of the catalyst and reaction conditions, a functionally diverse set of 3HLs was prepared. Mechanistic insight was gained by observation of the carbonylation reaction using in situ IR spectroscopy, and we propose a mechanism that is consistent with previously studied epoxide carbonylation systems.