Preparations and reactions of 2-trifluoromethylketenimines
摘要:
Preparations and reactions of a series of 2-trifluoromethylketenimines are described. Trifluoromethylketenimines were prepared from trifluoropropanoic acids via corresponding imidoyl chlorides in good yields. 2-Trifluoromethylketenimine was functionalized at its beta-position by electrophilic addition of halide, followed by dehydrohalogenation. Addition of nucleophile at alpha-position gave trifluoroethylated beta-amino acid derivative via 1,3-proton shift. (C) 2009 Elsevier B.V. All rights reserved.