Method for producing fluorine-containing compound and method for producing surface treatment agent

A method for producing a fluorine-containing compound represented by the following formula (C1) or (C2), the method comprising:

• reacting a compound represented by the following formula (A3) or (A4) with a compound represented by the following formula (B2):
• G1-L1-CR1R2—MgR12 Formula (A3)
• R12Mg—CR3R4-L2-G2-L3-CR5R6—MgR12 Formula (A4)
• R11—X4 Formula (B2)
• G1-L1-CR1R2—R11 Formula (C1)
• R11—CR3R4-L2-G2-L3-CR5R6—R11 Formula (C2)
• where, in the formula,
• G1 is a monovalent group having a (poly)oxyfluoroalkylene chain,
• G2 is a divalent group having a (poly)oxyfluoroalkylene chain,
• L1, L2, and L3 are each independently a single bond or a divalent organic group,
• R1, R2, R3, R4, R5, and R6 are each independently a hydrogen atom or an alkyl group having 1 to 6 carbon atoms which may have a substituent,
• R11's are each independently a hydrocarbon group which may have a substituent or a heteroatom, and when there are a plurality of R11's, the R11's may be the same as or different from each other,
• R12 is a halogen atom or a hydrocarbon group which may have a substituent or a heteroatom, and when there are a plurality of R12's, the R12's may be the same as or different from each other, and
• X4 is a halogen atom.

A method for producing a fluorine-containing compound represented by the following formula (C1) or (C2), the method comprising:

• reacting a compound represented by the following formula (A1) or (A2), a compound represented by the following formula (B2), and a compound represented by the following formula (B3) with each other:
• G1-L1-CR1R2—X1 Formula (A1)
• X2—CR3R4-L2-G2-L3-CR5R6—X3 Formula (A2)
• R11—X4 Formula (B2)
• R14—CR15R16—MgR12 Formula (B3)
• G1-L1-CR1R2—R11 Formula (C1)
• R11—CR3R4-L2-G2-L3-CR5R6—R11 Formula (C2)
• where, in the formula,
• G1 is a monovalent group having a (poly)oxyfluoroalkylene chain,
• G2 is a divalent group having a (poly)oxyfluoroalkylene chain,
• L1, L2, and L3 are each independently a single bond or a divalent organic group,
• R1, R2, R3, R4, R5, and R6 are each independently a hydrogen atom or an alkyl group having 1 to 6 carbon atoms which may have a substituent,
• R11 is a hydrocarbon group which may have a substituent or a heteroatom, and when there are a plurality of R11's, the R11's may be the same as or different from each other,
• R12 is a halogen atom or a hydrocarbon group which may have a substituent or a heteroatom,
• R14, R15, and R16 are each independently a hydrogen atom or a hydrocarbon group which may have a substituent or a heteroatom, and
• X1, X2, X3, and X4 are each independently a halogen atom.