Trifluoroacetic acid → 2-(2,6-Dichlorophenyl)-7-fluoro-2H-pyrazolo[4,3-c]pyridin-4-ylamine

Participants

Reaction Steps

TFA (2.0 ml) was added to a mixture of [2-(2,6-dichlorophenyl)-7-fluoro-2H-pyrazolo[4,3-c]pyridin-4-yl]-carbamic acid tert-butyl ester (390 mg, 1 mmol) in DCM (5 mL) and the reaction mixture was stirred at room temperature for 3.5 h. The volatiles were removed under reduced pressure and the resultant residue was dissolved in DCM and washed with saturated aqueous sodium bicarbonate solution (×2) and brine. The organic layer was dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure to afford the title compound as an off-white solid (226 mg, 74% yield). 1H NMR (400 MHz, DMSO-d6): δ 8.74 (d, J=3.0 Hz, 1H), 7.82-7.78 (m, 2H), 7.72-7.68 (m, 1H), 7.53 (d, J=4.3 Hz, 1H), 6.86 (br s, 2H).

Provenance & Evidence