An SN2-type trifluoromethylation of benzyl halides under transition-metal-free conditions has been developed using trifluoromethyltrimethylsilane (CF3SiMe3, Ruppert−Prakash reagent) and CsF in 1,2-dimethoxyethane (DME). Under the developed reaction conditions, the in situ generated trifluoromethyl anion (CF3 −) overcame the instability and displayed enhanced nucleophilicity in the presence of DME. This method provides an efficient approach for the generation of various (2,2,2-trifluoroethyl)arenes such as those bearing alkyl, alkoxy, halo (F, Cl, and Br) and trifluoromethyl groups on the benzene rings.
ASJC Scopus subject areas
- Organic Chemistry