Method for producing a fluorine-containing compound

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 EF of the compound (4) to obtain a compound (5) and/or a compound (6):

• E1-RA-E1 (1)
• E2-RB (2)
• RB-E-RA-E-RB (3)
• RBF-EF-RAF-EF-RBF (4)
• EF1-RAF-EF1 (5)
• RBF-EF2 (6)
• wherein
• RA, RB:
• RA is a fluorine-containing bivalent organic group which is the same as RAF, or a bivalent organic group which will be converted to RAF by a fluorination reaction, and RB is a monovalent organic group which is the same as RBF, or a monovalent organic group which will be converted to RBF by a fluorination reaction,
• RAF, RBF:
• RAF is a fluorine-containing bivalent organic group which is the same as or different from RA, and when different, it is a group having RA fluorinated, and RBF is a fluorine-containing monovalent organic group which is the same as or different from RB, and when different, it is a group having RB fluorinated,
• E1, E2:
• 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 E1 and E2,
• EF:
• a group which is the same as E, or a group having E fluorinated, provided that at least one selected from RAF, RBF and EF, is a group formed by a fluorination reaction, and
• EF1, EF2:
• each independently is a group formed by cleavage of EF.