Zinc Carbenoid-Mediated Chain Extension: Preparation of α,β-Unsaturated-γ-keto Esters and Amides
作者:Matthew D. Ronsheim、Charles K. Zercher
DOI:10.1021/jo026299g
日期:2003.5.1
one-pot preparation of alpha,beta-unsaturated-gamma-keto esters and amides has been developed. A zinc carbenoid-mediated chain extension of a beta-dicarbonyl substrate provides access to an intermediate zinc enolate, which is treated sequentially with a halogen and amine base. This method has been applied to a variety of ester and amide starting materials, as well as to amino acid-derived substrates