Sodium Hydroxide → 1-(1-Methylethyl)-6-(3-thienyl)-1H-pyrazolo[3,4-b]pyridine-4-carboxylic acid

Participants

Reaction Steps

The title compound was prepared in the same manner as described for intermediate 58 using ethyl 1-(1-methylethyl)-6-(3-thienyl)-1H-pyrazolo[3,4-b]pyridine-4-carboxylate (400 mg, 1.268 mmol), Ethanol (5 mL) THF (1 mL), and sodium hydroxide (2.114 mL, 6.34 mmol). The final product was collected as 370 mg (100%). LCMS E-S (M+H)=287.9. 1H NMR (400 MHz, DMSO-d6) δ ppm 1.55 (d, J=6.8 Hz, 6H), 5.34 (quin, J=6.6 Hz, 1H), 7.72 (dd, J=5.0, 3.0 Hz, 1H), 7.93 (dd, J=5.0, 1.3 Hz, 1H), 8.15 (s, 1H), 8.34 (s, 1H), 8.49 (dd, J=3.0, 1.3 Hz, 1H), 13.97 (s, 1H).

Provenance & Evidence