4-Functionally-substituted 3-heterylpyrazoles: XVII. 3-Aryl-1-phenyl-4-pyrazolmethylsulfanyl(sulfinyl, sulfonyl)acetic acids

3-Aryl-1-phenyl-4-mercaptomethylpyrazoles reacted with monochloroacetic acid to give 3-aryl-1-phenyl-4-pyrazolylmethylsulfanylacetic acids whose oxidation with hydrogen peroxide in acetone or acetic acid solution led to 3-aryl-1-phenyl-4-pyrazolylmethylsulfinyl-and sulfonylacetic acids, respectively.