Pyrazole → HCID 21949919, compound

Participants

Reaction Steps

Pyrazole (23 mg, 0.330 mmol) was added in one portion to a stirred solution of the bromide of Example 137 (148 mg, 0.300 mmol) and sodium hydride (60% dispersion in oil, 13.2 mg, 0.330 mmol) in N,N-dimethylformamide (2 ml) at room temperature under nitrogen. The reaction was stirred for 5 hours, quenched with water (1.00 ml) and concentrated under reduced pressure. The residue was dissolved in dichloromethane (30 ml) and the resulting solution was washed with 1M aqueous potassium carbonate solution (10 ml), dried over magnesium sulphate, filtered and concentrated under reduced pressure. The crude product was purified by flash chromatography on silica gel eluting with dichloromethane:methanol (98:2, by volume) to provide the title compound (125 mg) as a colourless oil.

Provenance & Evidence