Benzyl Bromide → 1-Benzyl-1H-pyrazole

Participants

Reaction Steps

To a solution of 4-iodopyrazole (400 mg, 2 mmol) in DMF(4 mL) at 0 C was added sodiumhydride (80 mg, 60% dispersion in mineral oil, 2 mmol) followed by benzyl bromide (342 mg, 2 mmol) and reaction mixture was allowed to stir for 2 h. Reaction mixture was concentrated in vacuo and the residue was purified by column chromatography to give N-benzylpyrazole in almost quantitative yield. 1H NMR 5.29 (s, 2H), 7.18–7.28 (m,2H), 7.28–7.40 (m, 4H), 7.53 (s, 1H).

Provenance & Evidence