Fluorine-containing α-hydrothionyl fluorides

A method has been found for the synthesis of fluoride-containing -hydrothionyl fluorides by heating polyfluoroalkenyl benzyl sulfides having fluoride atoms in the -position relative to the sulfur atom with fluorosulfonic acid. The reactions of the acid fluorides obtained with secondary amines were studied. The reaction of the -hydrotetrafluorothiopropionyl fluoride with NH(Me)₂ leads to the amide of the corresponding acid, while the product of -hydrohexafluorothioisobutyryl fluoride with diethylamine is the dimer of bis(trifluoromethyl)thioketene.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 8, pp. 1898–1901, August, 1990.