Regioselective 1,4-trifluoromethylation of α,β-unsaturated ketones via a S-(trifluoromethyl)diphenylsulfonium salts/copper system

Abstract

Regioselective conjugate 1,4-trifluoromethylation of α,β- unsaturated ketones by the use of shelf-stable electrophilic trifluoromethylating reagents, S-(trifluoromethyl)diphenylsulfonium salts and copper under mild conditions is described. A wide range of acyclic aryl-aryl-enones and aryl-alkyl-enones were converted into β- trifluoromethylated ketones in low to moderate yields. © 2013 Okusu et al; licensee Beilstein-Institut.