Tetrahydrofuran → HCID 58662445, compound

Participants

Reaction Steps

(6-Ethyl-1,3-dimethyl-4,5,6,7-tetrahydro-1H-pyrazolo[3,4-b]pyridine-4-yl)-carbamic acid benzyl ester (0.35 g, 1.08 mmol) obtained in step (ii), dry THF (5 mL) and potassium carbonate (0.45 g, 3.2 mmol) were charged to a flask under a nitrogen atomsphere. This mixture was stirred at room temperature for about 0.5 h, after which time ethyl chloroformate (0.47 g, 3.2 mmol) was added drop-wise. This reaction mixture was then stirred for about 4 h, water was added to the mixture, and the aqueous layer was extracted with ethyl acetate (3×10 mL). The combined organic layer was washed with brine (1×20 mL), dried over sodium sulphate, and concentrated under vacuum to afford the title compound (0.375 g, 88%).

Provenance & Evidence