Acetyl chloride → N-({6-[1-(pyridin-3-yl)-1H-pyrazol-4-yl]pyridin-2-yl}sulphonyl)acetamide

Participants

Reaction Steps

6-[1-(Pyridin-3-yl)-1H-pyrazol-4-yl]pyridin-2-sulphonamide (0.15 g, 0.44 mmol) was initially charged in acetonitrile (1.5 ml) under argon, and sodium hydride (0.026 g, 0.66 mmol, 60%) was added in portions. The reaction mixture was stirred at room temperature for 1 h, then acetyl chloride (0.052 g, 0.66 mmol) was added dropwise. The reaction mixture was stirred at 82° C. for 33 h and, after cooling, the solvent was removed under reduced pressure. The residue was taken up in saturated sodium hydrogencarbonate solution, dichloromethane was added and the precipitated solid was filtered off. The phases of the filtrate were separated; the aqueous phase was adjusted to pH 3 with hydrochloric acid and left to stand for 16 h. The precipitated crystals were filtered off with suction. Yield 0.02 g (12% of theory) of N-({6-[1-(pyridin-3-yl)-1H-pyrazol-4-yl]pyridin-2-yl}sulphonyl)acetamide.

Provenance & Evidence