PROCESS FOR PRODUCING FLUORINATED ALKENE DERIVATIVE AND FLUORINATED ALKANE DERIVATIVE

摘要

A vic-dichloro-fluorinated alkene of the formula: R¹-CCl=CCl-R², and a fluorinated alkane of the formula: R¹-CR³R⁴-CR⁵R⁶-R², wherein each of R¹ and R² independently represents a perfluoroalkyl group or both of R¹ and R² form together a perfluoroalkylene group, and R³, R⁴, R⁵ and R⁶ independently represent hydrogen or fluorine, are produced from an inexpensive raw material. More specifically, hexachlorocyclopentadiene is reacted with gaseous chlorine using an antimony catalyst, and then the reaction product is reacted with hydrogen fluoride to give 1,2-dichlorohexafluorocyclopentene. Thus-obtained compound is either (i) hydrogenated, or (ii) treated with a fluorinating agent to substitute the chlorine atoms by fluorine atoms, and then hydrogenated, to give the intended fluorinated alkane.