title: 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.
authors.affiliation: Department of Frontier Materials, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya 466-8555, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Okusu
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Sugita
authors.forename: Etsuko
authors.initials: E
authors.lastname: Tokunaga
authors.forename: Norio
authors.initials: N
authors.lastname: Shibata
keywords: 1,4-addition; Michael addition; copper; fluorine; organo-fluorine; trifluoromethylation