Patent ID: RE41184

Claim:
A process for producing a fluorine atom-containing sulfonyl fluoride compound, which comprises reacting a compound of the following formula (1) with a compound of the following formula (2) to form a compound of the formula (3), then, reacting the compound of the formula (3) with fluorine in a liquid phase to form a compound of the following formula (4), and further, decomposing the compound of the formula (4) to obtain a compound of the following formula (5): XSO 2 R A -E 1 (1) R B -E 2 (2) XSO 2 R A -E-R B (3) FSO 2 R AF -E F -R BF (4) FSO 2 R AF -E F1 (5) wherein R A is a bivalent organic group, E 1 is a monovalent reactive group, R B is a monovalent organic group, E 2 is a monovalent reactive group which is reactive with E 1 , E is a bivalent connecting group formed by the reaction of E 1 , with E 2 , R AF is the same group as R A , or a bivalent organic group formed by the fluorination of R A , R BF is the same group as R B , or a monovalent organic group formed by the fluorination of R B , E F is the same group as E, or a bivalent connecting group formed by the fluorination of E, E F1 is a monovalent group formed by the decomposition of E F , and X is a halogen atom, provided that at least one of R A , R B and E is a group which can be fluorinated, and at least one of R AF , R BF and E F is a group formed by the fluorination of R A , R B and E, respectively.