p-Toluenesulfonic acid → HCID 59210401, compound

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Reaction Steps

A toluene solution of 4,4,4-trifluoro-1-(3-methyl-4-nitro-phenyl)-butane-1,3-dione (1.8 g), 2,2,2-trifluoroethylhydrazine (1.2 g) and a catalytic amount of p-toluenesulfonic acid were refluxed for 6 hours. After cooling, the solvent was distilled off and the obtained residue was purified by silica gel column chromatography to obtain 3-(3-methyl-4-nitro-phenyl)-1-(2,2,2-trifluoro-ethyl)-5-trifluoro-methyl-1H-pyrazole (IX-5) (1.1 g) and 5-(3-methyl-4-nitro-phenyl)-1-(2,2,2-trifluoro-ethyl)-3-trifluoromethyl-1H-pyrazole (1-6) (0.5 g), respectively.

Provenance & Evidence