Patent ID: 7414148

Claim:
A process for producing an alkoxycarbonylfluoroalkanesulfonate represented by the formula [1] comprising the steps of: (a) reacting a halofluoroalkanoate represented by the formula [2] with a sulfinating agent, thereby obtaining an alkoxycarbonylfluoroalkanesulfinate represented by the formula [3] and (b) reacting the alkoxycarbonylfluoroalkanesulfinate with an oxidizing agent, thereby obtaining the alkoxycarbonylfluoroalkanesulfonate represented by the formula [1], wherein, in the formula [1], R represents a C 1 -C 25 straight-chain, branched-chain or cyclic alkyl group, or a C 2 -C 25 straight-chain, branched-chain or cyclic alkenyl group, where hydrogen atoms of the alkyl group may partially or entirely be replaced with fluorine or hydroxyl group, where two hydrogen atoms on a carbon atom of the alkyl group may be replaced with an oxygen atom to form a keto group, where hydrogen atoms of the alkenyl group may partially or entirely be replaced with fluorine or hydroxyl group, and where two hydrogen atoms on a methylene carbon atom of the alkenyl group may be replaced with an oxygen atom to form a keto group, wherein, in the formula [1], each of R 1 and R 2 independently represents a fluorine atom, or a C 1 -C 6 straight-chain, branched-chain or cyclic perfluoroalkyl group, wherein, in the formula [1], M n+ represents a counter cation, and n represents a positive integer, wherein, in the formula [2], X represents a chlorine atom, bromine atom or iodine atom; and R, R 1 and R 2 are defined as in the formula [1], wherein, in the formula [3], R, R 1 , R 2 , M n+ and n are defined as in the formula [1].