Acetyl chloride → HCID 21949762, compound

Participants

Reaction Conditions

Reaction Steps

Sodium hydride (60% dispersion in oil, 684 mg, 17.1 mmol) was added to a stirred solution of acetyl chloride (1.21 ml, 17.1 mmol) and the pyrazole of Example 53 (4.00 g, 15.6 mmol) in N,N-dimethylformamide (20 ml) at 0° C. under nitrogen. The reaction was stirred at 0° C. for 1 hour and then quenched by the addition of water (100 ml). The aqueous extracted was with ether (2×50 ml). The combined organic phases were washed with water (30 ml) and brine (30 ml), dried over magnesium sulphate, filtered and concentrated under reduced pressure to leave a yellow solid. The crude product was purified by flash column chromatography on silica gel eluting with pentane:ether (90:10, by volume) to provide the title compound (3.0 g) as a white solid, m.p.<60° C.

Provenance & Evidence