Benzyl (Phenyl) γ- and δ-lactones via Photoinduced Tandem Ar−C, C−O Bond Formation
摘要:
A convenient metal-free procedure for the preparation of benzyl (phenyl) gamma- and delta-lactones is illustrated. This method is based on the photochemical generation of phenyl cations and their reaction with 3, 4, or 5-alkenoic acids. This leads to a phenyl- or benzyl-substituted lactone by tandem formation of an aryl-C and C-O bond. The intermediacy of a phenonium ion imparts a full regio- and stereoselectivity to the reaction.
Benzyl (Phenyl) γ- and δ-lactones via Photoinduced Tandem Ar−C, C−O Bond Formation
作者:Stefano Protti、Maurizio Fagnoni、Angelo Albini
DOI:10.1021/ja0627287
日期:2006.8.1
A convenient metal-free procedure for the preparation of benzyl (phenyl) gamma- and delta-lactones is illustrated. This method is based on the photochemical generation of phenyl cations and their reaction with 3, 4, or 5-alkenoic acids. This leads to a phenyl- or benzyl-substituted lactone by tandem formation of an aryl-C and C-O bond. The intermediacy of a phenonium ion imparts a full regio- and stereoselectivity to the reaction.