Patent ID: 7524977

Claim:
A process for producing a fluoroalkanesulfonamide derivative represented by the formula [3], R 2 —NH—SO 2 —R f —R 1 [3] comprising reacting a fluoroalkanesulfonic anhydride represented by the formula [1], (R 1 R f SO 2 ) 2 O [1] with an organic primary amine represented by the formula [2], R 2 —NH 2 [2] in the presence of water and in the presence of a base selected from the group consisting of (a) a hydroxide of an alkali metal or alkaline-earth metal or (b) a basic salt containing an alkali metal or alkaline-earth metal, wherein R f represents a C 1 -C 20 perfluoroalkylene group —(C a F 2a )— where a is an integer of 1-20, R 1 represents a fluorine atom, hydrogen atom, halo-substituted alkyl group, halo-substituted alkenyl group, or halo-substituted alkoxy group, R f and R 1 may be bonded together to form a cyclic structure, and R 2 represents an organic functional group containing at least one polymerizable double bond.