An optimized preparation of 3-chloropentafluoropropene-1,2-oxide via alkaline peroxide epoxidation of 3-chloropentafluoro-1-propene under phase transfer catalysis conditions is described. The title epoxide was reacted with various bifunctional nitrogen nucleophiles to give five-, six- and seven-membered-ring heterocycles with pendant chlorodifluoromethyl groups. The described methodology represents a novel approach to chlorodifluoromethylated heterocycles. (C) 2001 Elsevier Science B.V. All rights reserved.
3-chloropentafluoropropene-1,2-oxide: Preparation and reactions with some heteroatom nucleophiles and antimony pentafluoride
作者:J. Kvíčala、O. Paleta
DOI:10.1016/s0040-4039(00)73477-0
日期:1994.9
Nucleophilic epoxidation of 3-chloropentafluoro-1-propene at PTC conditions afforded 3-chloropentafluoropropene-1,2-oxide, which was reacted with some oxygen and nitrogen nucleophiles to 3-chloro-3,3-difluoropropionic acid derivatives. With antimony pentafluoride, mixture of fluorinated acetones was obtained.