Di:chloro-per:fluoro-mono-cyclo-olefin cpds. - prepd. by reacting per:chloro-mono-cyclo:olefin atmos with hydrogen fluoride

摘要

Dichloroperfluoromonocyclo-olefins (I) of formula (I) are prepd. by reacting (A) perchloromonocyclo-olefins and/or (B) perhalomono-cyclolefins contg. F and at least 3 Cl atoms, (A) and (B) each ahving 4-6 ring C atoms, with HF in liq. phase in presence of catalytic amt. of SbCls. In (I) n = 0, 1 or 2. USE/ADVANTAGE - (I) are intermediates. Process is suitable for large scale prodn., reaction conditions are mild, without high temp., (I) are obtd. in good yield and high purity, HF is inexpensive and readily available, SbCls can be reused.