Patent ID: 6956138

Claim:
A method for producing a fluorine-containing compound, which comprises reacting the following compound (1) with the following compound (2) to produce the following compound (3) (provided that the compound (3) is a compound having a fluorine content of at least 30 mass % and has a hydrogen atom or an unsaturated bond which can be fluorinated), fluorinating the compound (3) in a liquid phase to produce the following compound (4), followed by a cleavage reaction of E F of the compound (4) to obtain a compound (5) and/or a compound (6): E 1 -R A -E 1 (1) E 2 -R B (2) R B -E-R A -E-R B (3) R BF -E F -R AF -E F -R BF (4) E F1 -R AF -E F1 (5) R BF -E F2 (6) wherein R A , R B : R A is a fluorine-containing bivalent organic group which is the same as R AF , or a bivalent organic group which will be converted to R AF by a fluorination reaction, and R B is a monovalent organic group which is the same as R BF , or a monovalent organic group which will be converted to R BF by a fluorination reaction, R AF , R BF : R AF is a fluorine-containing bivalent organic group which is the same as or different from R A , and when different, it is a group having R A fluorinated, and R BF is a fluorine-containing monovalent organic group which is the same as or different from R B , and when different, it is a group having R B fluorinated, E 1 , E 2 : reactive groups which will react to each other to form a bivalent connecting group (E), E: a bivalent connecting group formed by the reaction of E 1 and E 2 , E F : a group which is the same as E, or a group having E fluorinated, provided that at least one selected from R AF , R BF and E F , is a group formed by a fluorination reaction, and E F1 , E F2 : each independently is a group formed by cleavage of E F .