Pyrazole → 3-[2-(1H-1-pyrazolyl)acetyl]benzonitrile

Participants

Reaction Steps

To a solution of 3-(2-bromoacetyl)benzonitrile (500 mg, 2.23 mmol) in 5 ml dichloromethane was added pyrazole (304 mg, 4.46 mmol) and triethylamine (0.31 ml, 2.23 mmol). Reaction was stirred at room temperature over night. Reaction was then diluted with 20 ml dichloromethane, washed with 2×25 ml water, 2×25 ml 1N HCl, dried over magnesium sulfate, filtered and concentrated in vacuo. Crude residue was chromatographed on silica gel using 2.5% EtOAc in hexane to give 3-[2-(1H-1-pyrazolyl)acetyl]benzonitrile (330 mg, 70%) as a clear oil after drying. ES-MS (M+H+): 212.05

Provenance & Evidence