Potassium Carbonate → Ethyl 4-[2-(tert-butoxycarbonylamino)ethylamino]-1,3-dimethyl-pyrazolo[3,4-b]pyridine-5-carboxylate

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Reaktionsschritte

To a mixture of ethyl 4-chloro-1,3-dimethyl-1H-pyrazolo[3,4-b]pyridine-5-carboxylate (500 mg, 1.971 mmol) and potassium carbonate (817 mg, 5.91 mmol) in acetonitrile (15 ml) was slowly added tert-butyl N-(2-aminoethyl)carbamate (1.248 ml, 7.88 mmol) via a syringe. The reaction mixture was stirred at room temperature for 3 hours. The solids were filtered off over a glass filter and washed with a 1:1 mixture of EtOH and DCM. The combined filtrates were concentrated under reduced pressure to give a white semisolid, which was purified by column chromatography (silica gel using a gradient of ethanol (0-5%) in DCM) to yield 658 mg of a white solid (1.743 mmol, 88%). MS (ESI) m/z=378.2 [M+1]+.

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