Method for producing fluorine-containing acylacetic acid derivative, method for producing fluorine-containing pyrazolecarboxylic acid ester derivative, and method for producing fluorine-containing pyrazolecarboxylic acid derivative

1. A method for producing a fluorine-containing acylacetic acid derivative represented by the following Formula (3), comprising obtaining a mixture containing a base, a compound represented by the following Formula (1), and a compound represented by the following Formula (2), and adding a halogenating agent to the mixture:

wherein Rf represents an alkyl group having 1 to 6 carbon atoms which is substituted by at least one fluorine atom;

wherein R1 and R2 each independently represent a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms, an aryl group which may be substituted, an arylalkyl group which may be substituted, or an acyl group having 1 to 6 carbon atoms which may be substituted, or together represent an atomic group that forms a 5- or 6-membered ring containing 0 or 1 hetero atom with the nitrogen atom to which R1 and R2 are bonded; R3 represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms, an aryl group which may be substituted, or an arylalkyl group which may be substituted; and R4 represents an alkyl group having 1 to 6 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms, an aryl group which may be substituted, or an arylalkyl group which may be substituted;

wherein Rf, R1, R2, R3 and R4 have the same definitions as above.

2. The method for producing a fluorine-containing acylacetic acid derivative according to claim 1 , wherein R1 and R2 each independently represent an alkyl group having 1 to 6 carbon atoms or a cycloalkyl group having 3 to 6 carbon atoms, or together represent an atomic group that forms a 5- or 6-membered ring containing 0 or 1 hetero atom with the nitrogen atom to which R1 and R2 are bonded; R3 represents a hydrogen atom.

3. The method for producing a fluorine-containing acylacetic acid derivative according to claim 2 , wherein Rf represents a trifluoromethyl group, R1 and R2 respectively represent a methyl group, and R4 represents an alkyl group having 1 to 6 carbon atoms.

4. A method for producing a fluorine-containing pyrazolecarboxylic acid ester derivative represented by the following Formula (5), comprising obtaining a mixture containing a base, a compound represented by the following Formula (1), and a compound represented by the following Formula (2), and adding a halogenating agent to the mixture:

wherein Rf represents an alkyl group having 1 to 6 carbon atoms which is substituted by at least one fluorine atom;

wherein R1 and R2 each independently represent a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms, an aryl group which may be substituted, an arylalkyl group which may be substituted, or an acyl group having 1 to 6 carbon atoms which may be substituted, or together represent an atomic group that forms a 5- or 6-membered ring containing 0 or 1 hetero atom with the nitrogen atom to which R1 and R2 are bonded; R3 represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms, an aryl group which may be substituted, or an arylalkyl group which may be substituted; R4 represents an alkyl group having 1 to 6 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms, an aryl group which may be substituted, or an arylalkyl group which may be substituted;

wherein Rf, R1, R2, R3 and R4 have the same definitions as above;

and reacting the compound represented by Formula (3) with a compound represented by the following Formula (4):

wherein R5 represents an alkyl group having 1 to 6 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms, an aryl group which may be substituted, or an arylalkyl group which may be substituted;

wherein Rf, R3, R4 and R5 have the same definitions as above.

5. The method for producing a fluorine-containing pyrazolecarboxylic acid ester derivative according to claim 4 , wherein R1 and R2 each independently represent an alkyl group having 1 to 6 carbon atoms or a cycloalkyl group having 3 to 6 carbon atoms, or together represent an atomic group that forms a 5- or 6-membered ring containing 0 or 1 hetero atom with the nitrogen atom to which R1 and R2 are bonded; and R3 represents a hydrogen atom.

6. The method for producing a fluorine-containing pyrazolecarboxylic acid ester derivative according to claim 5 , wherein Rf represents a trifluoromethyl group, R1 and R2 respectively represent a methyl group, R4 represents an alkyl group having 1 to 6 carbon atoms, and R5 represents an alkyl group having 1 to 6 carbon atoms.

7. A method for producing a fluorine-containing pyrazolecarboxylic acid derivative represented by the following Formula (6), comprising obtaining a mixture containing a base, a compound represented by the following Formula (1), and a compound represented by the following Formula (2), and adding a halogenating agent to the mixture:

wherein Rf represents an alkyl group having 1 to 6 carbon atoms which is substituted by at least one fluorine atom;

wherein R1 and R2 each independently represent a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms, an aryl group which may be substituted, an arylalkyl group which may be substituted, or an acyl group having 1 to 6 carbon atoms which may be substituted, or together represent an atomic group that forms a 5- or 6-membered ring containing 0 or 1 hetero atom with the nitrogen atom to which R1 and R2 are bonded; R3 represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms, an aryl group which may be substituted, or an arylalkyl group which may be substituted; and R4 represents an alkyl group having 1 to 6 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms, an aryl group which may be substituted, or an arylalkyl group which may be substituted;

wherein Rf, R1, R2, R3 and R4 have the same definitions as above; reacting the compound represented by Formula (3) with a compound represented by the following Formula (4):

wherein R5 represents an alkyl group having 1 to 6 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms, an aryl group which may be substituted, or an arylalkyl group which may be substituted;

wherein Rf, R3, R4 and R5 have the same definitions as above;

and hydrolyizing the compound represented by Formula (5);

wherein Rf, R3, and R5 have the same definitions as above.

8. The method for producing a fluorine-containing pyrazolecarboxylic acid ester derivative according to claim 7 , wherein R1 and R2 each independently represent an alkyl group having 1 to 6 carbon atoms or a cycloalkyl group having 3 to 6 carbon atoms, or together represent an atomic group that forms a 5- or 6-membered ring containing 0 or 1 hetero atom with the nitrogen atom to which R1 and R2 are bonded; and R3 represents a hydrogen atom.

9. The method for producing a fluorine-containing pyrazolecarboxylic acid ester derivative according to claim 8 , wherein Rf represents a trifluoromethyl group R1 and R2 respectively represent a methyl group, R4 represents an alkyl group having 1 to 6 carbon atoms, and R5 represents an alkyl group having 1 to 6 carbon atoms.