Methanesulfonyl chloride → HCID 19886265, compound

Participants

Reaction Steps

A mixture of 1-(4-fluorophenyl)-5-[4-(methylsulfonyl)phenyl]pyrazol-3-amine (0.8 g) and methanesulfonyl chloride (0.224 ml) in pyridine (8 ml) was stirred at ambient temperature for 2 hours. Pyridine was evaporated, and the residue was dissolved in ethyl acetate, washed with water and dilute hydrochloric acid, dried, and concentrated. The residual oil (1.1 g) was purified by column chromatography on silica gel (20 g) eluting with a mixture of toluene and ethyl acetate (2:1). The product (0.74 g) was recrystallized from ethanol to give pale brown crystals of N-{1-(4-fluorophenyl)-5-[4-(methylsulfonyl)phenyl]-3-pyrazolyl}methanesulfonamide (0.62 g).

Provenance & Evidence