Boron tribromide → 2-(1H-pyrazol-4-yl)phenol

Participants

Reaction Steps

To a solution of 4-(2-methoxyphenyl)pyrazole (300 mg, 1.72 mmol) in dichloromethane (13 ml) is added a 1M solution of boron tribromide (3.8 ml) in dichloromethane. The mixture is stirred at room temperature over night then concentrated under reduced pressure. The residue is chromatographed (silica gel, dichloromethane/ethanol 9:1) to give 270 mg of 2-(pyrazol-4-yl)phenol (98%).

Provenance & Evidence