Patent ID: 7488831

Claim:
A process for producing a 5-hydroxy-4-thiomethylpyrazole compound, comprising: reacting a pyrazole represented by formula (1): (Chemical Formula 1) (wherein R 1 represents a hydrogen atom, an alkyl group, an aromatic hydrocarbon group capable of having a substituent, or a heterocyclic group capable of having a substituent, and R 2 represents an electron-withdrawing group), with a sulfur compound represented by the following formula (2): (Chemical Formula 2) X—S (O) n —R 3 (2) (wherein X represents a hydrogen atom or a metal, R 3 represents an alkyl group, an aromatic hydrocarbon group capable of having a substituent, or a heterocyclic group capable of having a substituent, and n represents 0 or 2) in the presence of a base and formaldehyde, to thereby produce a 5-hydroxy-4-thiomethylpyrazole compound represented by the following formula (3): (wherein R 1 , R 2 , R 3 and n have the same meanings as those described above).