Ketene thioacetal derivatives from perfluoroisobutene (PFIB) and its 1,1-dichloro analogue
作者:Christopher M. Timperley
DOI:10.1016/s0022-1139(98)00343-1
日期:1999.2
Perfluoroisobutene (PW) underwent double vinylic substitution with aromatic thiols under aqueous and non-aqueous conditions to give several new ketene thioacetals. The 1,1-dichloro analogue of PFIB was synthesised as a less toxic alternative to PFIB. It was shown to react similarly to PFIB. Reaction of the 1,1-dichloro analogue with 2-aminobenzenethiol did not give a ketene thioacetal, but instead yielded a fluorinated benzothiazole. PFIB reacted with thiols in aqueous phosphate buffer (pH 7). L-Cysteine isopropyl ester, a thiol pretreatment that protects animals from the toxic effects of PFIB, combines with PFIB under these conditions to give a fluorinated thiazole adduct. The acute inhalation toxicity of PFIB is most likely attributable to its ability to act as a bis-alkylating agent towards biological nucleophiles, especially thiols, in the lung. (C) 1999 Elsevier Science S.A. All rights reserved.
Fluoroalkene chemistry
作者:Christopher M. Timperley、Matthew J. Waters、Jackie A. Greenall
DOI:10.1016/j.jfluchem.2005.11.008
日期:2006.2
Reactions of perfluoroisobutene (PFIB), perfluoropropene (PFP) and chlorotrifluoroethene (CTFE) with benzenethiol and 2-methoxybenzenethiol in acetonitrile, with potassium carbonate as base, were compared. PFIB reacted with benzenethiol to give ketene thioacetal (CF3)2CC(SAr)2 and with 2-methoxybenzenethiol to give mono- and bis-vinyl species (CF3)2CCFSAr and (CF3)2CC(SAr)2. PFP reacted with both thiols