Patent ID: 7863460

Claim:
A process for producing 1-substituted-3-fluoro-alkylpyrazole -4-carboxylate in which 2-alkoxy-methylenefluoroacylacetate represented by general formula (1): wherein R 1 represents a hydrogen atom or a halogen atom, R 2 represents a hydrogen atom, a fluorine atom or an alkyl group having 1 to 12 carbon atoms, which may be substituted with a chlorine atom or a fluorine atom, and R 3 and R 4 each independently represents an alkyl group having 1 to 6 carbon atoms, and a hydrazine represented by general formula (2): R 5 NHNH 2 (2) wherein R 5 represents an alkyl group having 1 to 6 carbon atoms, which may be substituted, are reacted with each other in a water solvent or a mixed solvent of water and an organic solvent to produce 1-substituted-3-fluoroalkylpyrazole-4-carboxylate represented by general formula (3): wherein R 1 , R 2 , R 3 and R 5 have the same meanings as described above, wherein the process is characterized by the reaction being conducted in the presence of a base, wherein the base is selected from alkali metal hydroxides and alkali earth metal hydroxides.