Functionalization of iodopolyfuorgalkanes by electrochemical reduction

摘要

The invention relates to the preparation of functionalized derivatives from iodopolyfluoroalkanes by electrochemical reduction. This reduction is carried out in a formamide or substituted formamide solvent which may contain up to 70% (by volume) water, on a carbon cathode; for certain embodiments sulfur dioxide may also be present. This method of preparing perfluoroalkanecarboxylic acids RFCOOH or perfluoroalkanesulphinic acids, RFSO2H and alcohols of the RFC2H4OH type, also makes it possible to prepare new fluorinated compounds of formulae: I-(CF2)p-1-COOH and HO2S-(CF2)p-1-COOH, in which p is an even-numbered integer which may range from 4 to 12.