Ethanol → 1-(1-Methylethyl)-6-(4-pyridinyl)-1H-pyrazolo[3,4-b]pyridine-4-carboxylic acid

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Reaction Steps

The title compound was prepared in the same manner as described for intermediate 58 using ethyl 1-(1-methylethyl)-6-(4-pyridinyl)-1H-pyrazolo[3,4-b]pyridine-4-carboxylate (100 mg, 0.322 mmol), ethanol (4 mL), THF (0.8 mL), and sodium hydroxide (0.537 mL, 1.611 mmol). The final product was collected as 88 mg (97%). LCMS E-S (M+H)=283.2. 1H NMR (400 MHz, DMSO-d6) δ ppm 1.58 (d, J=6.4 Hz, 6H), 5.40 (m, 1H), 8.25 (d, J=5.6 Hz, 2H), 8.32 (s, 1H), 8.44 (s, 1H), 8.79 (d, J=5.6 Hz, 2H), 14.12 (br. s., 1H).

Provenance & Evidence