Methyl 3,3,3-trifluoro-2-oxopropanoate → 3-ethyl-alpha-hydroxy-2,5-dihydro-5-oxo-1-phenyl-alpha-trifluoromethyl-1H-pyrazole-4-acetic acid methyl ester

Participants

Reaction Conditions

Reaction Steps

To a chloroform solution (5 ml) of 3-ethyl-1-phenyl-5-pyrazolone (94 mg, 0.5 mmol), methyl trifluoropyruvate (78 mg, 0.5 mmol) was added at room temperature and the mixture was stirred at 80° C. for 2 hours. After removing the solvent under reduced pressure, the title compound was obtained as a colorless solid (172 mg).

Provenance & Evidence