Carbon tetrabromide → 5-(Bromomethyl)-1,3-dimethyl-1H-pyrazole

Participants

Reaction Steps

CBr4 (4.7 g, 14.2 mmol) was added to a solution of (1,3-dimethyl-1H-pyrazol-5-yl)methanol (1.2 g, 9.5 mmol) and triphenylphosphine (3.7 g, 14.2 mmol) in THF (20 mL) at 0° C. and the resulting mixture was stirred for approximately 2 h at rt. After concentration in vacuo purification by column chromatography eluting with 2% EtOAc in hexane yielded the title compound (1.31 g, 6.93 mmol).

Provenance & Evidence