Potassium Carbonate → tert-butyl 3-{[3-(3,5-dichlorophenoxy)-2-oxo-4-(trifluoromethyl)pyridin-1(2H)-yl]methyl}-1H-pyrazolo[3,4-b]pyridine-1-carboxylate

Participants

Reaction Steps

To a flask charged with 3-(3,5-dichlorophenoxy)-4-(trifluoromethyl)pyridin-2(1H)-one (0.500 g, 1.54 mmol) and potassium carbonate (0.213 g, 1.54 mmol) was added dimethylformamide (5 mL). To this under N2 was added tert-butyl 3-(bromomethyl)-1H-pyrazolo[3,4-b]pyridine-1-carboxylate (0.482 g, 1.54 mmol) as a solution in dimethylformamide (2 mL). This was allowed to stir at room temperature. After 16 hours, the reaction mixture was diluted with ethyl acetate (100 mL), washed with brine (3×50 mL), dried (MgSO4), filtered and the solvent was evaporated under reduced pressure. The residue was purified by column chromatography on a pre-packed silica gel Redi Sep 40 gram column, eluting with 0-50% ethyl acetate in hexanes to afford the title compound. 1H NMR (DMSO-d6) δ 8.72 (d, J=4.5 Hz, 1H), 8.26-8.22 (m, 1H), 8.11 (d, J=7.2 Hz, 1H), 7.43 (dd, J=8.0 Hz, J=4.6 Hz, 1H), 7.30-7.28 (m, 1H), 7.05-7.02 (m, 2H), 6.70 (d, J=7.2 Hz, 1H), 5.60 (s, 2H), 1.62 (s, 9H). HRMS (M+1)=555.0826.

Provenance & Evidence