Trifluoroacetic acid → 3-(3-Methoxy-4-((6-methoxypyridin-3-yl)methoxy)benzyl)-6-(1-(piperidin-4-yl)-1H-pyrazol-4-yl)-3H-imidazo[4,5-b]pyridine

Participants

Reaction Steps

To a stirred solution of tert-butyl 4-(4-(3-(3-methoxy-4-((6-methoxypyridin-3-yl)methoxy)benzyl)-3H-imidazo[4,5-b]pyridin-6-yl)-1H-pyrazol-1-yl)piperidine-1-carboxylate (0.15 g, 0.24 mmol) in dichloromethane (10 mL) was added trifluoroacetic acid (0.5 mL). The resulting mixture was stirred at room temperature. After 1 h, the reaction mixture was concentrated, and the residue was diluted with 1M potassium carbonate solution (20 mL) and extracted with dichloromethane (3×10 mL). The combined organic phases were washed with brine (3×20 mL), dried over sodium sulfate, filtered, and concentrated. The residue was purified by Prep-HPLC to afford 0.065 g (52%) of the product as a white solid: 1H NMR (500 MHz, CDCl3) δ 8.59 (s, 1H), 8.19 (s, 1H), 8.13 (s, 1H), 8.02 (s, 1H), 7.83 (s, 1H), 7.75 (s, 1H), 7.67 (d, J=8.0 Hz, 1H), 6.93 (s, 1H), 6.89 (d, J=8.0 Hz, 1H), 6.85 (d, J=8.5 Hz, 1H), 6.75 (d, J=8.5 Hz, 1H), 5.40 (s, 2H), 5.03 (s, 2H), 4.30 (m, 1H), 3.94 (s, 3H), 3.82 (s, 3H), 3.31-3.28 (m, 2H), 2.84-2.80 (m, 2H), 2.24-2.22 (m, 2H), 2.04-1.97 (m, 2H) ppm; (M+1)=526.

Provenance & Evidence