Sodium hydride → HCID 10270596, compound

Participants

Reaction Conditions

Reaction Steps

Sodium hydride (60% dispersion in oil, 24 mg, 0.600 mmol) was added to a stirred solution of the pyrazole of Example 2 (100 mg, 0.303 mmol) in dry N,N-dimethylformamide (4 ml) at 0° C. under nitrogen. The mixture was stirred at 0° C. for 30 minutes and 2-chloroethylamine hydrochloride (53 mg, 0.455 mmol) was added. The reaction mixture was stirred at 0° C. for 30 minutes and then stirred at room temperature for 30 minutes. The reaction was cooled to 0° C., further sodium hydride (60% dispersion in oil, 24 mg, 0.600 mmol) and 2-chloroethylamine hydrochloride (53 mg, 0.455 mmol) were added and the reaction was stirred for 1 hour. The reaction was quenched by the addition of water (5 ml) and extracted with ether (10 ml). The organic layer was washed with 2M aqueous hydrochloric acid (30 ml). The acid was neutralised with solid sodium carbonate and extracted with ether (3×20 ml). The combined ether layers were dried over magnesium sulphate, filtered and concentrated under reduced pressure. The crude product was purified by flash column chromatography on silica gel eluting with dichloromethane:methanol:ammonia (95:4:1, by volume) to provide the title compound (21 mg) as a colourless oil.

Provenance & Evidence