Phenylhydrazine → 5-Amino-3-methyl-1-phenylpyrazole

Participants

Reaction Steps

Into a 1000-mL 3-necked round bottom flask, was placed a solution of 3-oxobutanenitrile (23 g, 277.11 mmol, 1.00 equiv) in ethanol (400 mL), 1-phenylhydrazine (30 g, 277.78 mmol, 1.00 equiv). The resulting solution was heated to reflux overnight in an oil bath. The resulting mixture was then concentrated under vacuum. The residue was applied onto a silica gel column with ethyl acetate/petroleum ether (1:10-1:5) to yield 3-methyl-1-phenyl-1H-pyrazol-5-amine as a yellow solid.

Provenance & Evidence