Triphenylphosphine → HCID 59632228, compound

Participants

Reaction Steps

PPh3 (4.36 g, 16.62 mmol) was added at 0° C. to a stirred solution of [1-(2-chlorophenyl)-5-{5-[3-(methylsulfonyl)phenyl]-2-thienyl}-1H-pyrazol-3-yl]methanol (6.15 g, 13.85 mmol) in dry DCM. After 30 min, NBS (2.72 g, 15.28 mmol) was added portionwise at 0° C., and the mixture was stirred at it overnight. The solvent was removed in vacuo, and the crude product was purified by flash chromatography (0-50% EtOAc/hexanes) to afford 3-bromomethyl-1-(2-chlorophenyl)-5-{5-[3-(methylsulfonyl)phenyl]-thiophen-2-yl]-1H-pyrazole as a pale-yellow solid (3.6 g, 54%).

Provenance & Evidence