Process for producing fluorinated sulfonyl fluoride

摘要

The present invention provides a process for producing a fluorinated sulfonyl fluoride useful as e.g. a material for an ion exchange resin, and a novel chemical substance useful as an intermediate in the production process. That is, to provide a process comprising oxidizing Y-S-R^A-E-R^B by means of an oxidizing agent essentially containing a halogen atom to obtain XSO₂-R^A-E-R^B, and in a case that X is a fluorine atom, reacting the compound with fluorine in a liquid phase as it is, and in a case that X is a halogen atom other than a fluorine atom, converting X into a fluorine atom, and then reacting the obtained compound with fluorine in a liquid phase to obtain FSO₂-R^AF-E^F-R^BF, and then decomposing it to obtain FSO₂-R^AF-COF (wherein R^A is a bivalent organic group such as an alkylene group, R^B is a monovalent organic group such as a perfluoroalkyl group, E is -CH₂OCO-, Y is a monovalent organic group such as a cyano group or the like, X is a halogen atom, R^AF is a bivalent organic group having R^A fluorinated or the like, R^BF is the same group as R^B or the like, and E^F is -CF₂OCO-).