Trifluoroacetic acid → ethyl(3-(4-hydroxy-3-methoxybenzyl)-6-(1-methyl-1H-pyrazol-4-yl)-3H-imidazo[4,5-b]pyridin-2-yl)carbamate

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of ethyl (3-(3-methoxy-4-((4-methoxybenzyl)oxy)benzyl)-6-(1-methyl-1H-pyrazol-4-yl)-3H-imidazo[4,5-b]pyridin-2-yl)carbamate (2.50 g, 4.61 mmol) in dichloromethane (100 mL) at 0° C. was added trifluoroacetic acid (4.47 g, 3.0 mL, 39.18 mmol). The resulting mixture was allowed to stir at 0° C. After 2 h, the mixture was treated with 2M potassium carbonate solution to adjust the pH to ˜9. The basic mixture was extracted with 1:1 methanol/dichloromethane solution (2×50 mL). The combined organic phases were washed with brine (2×50 mL), dried over sodium sulfate, filtered, and concentrated to provide 1.80 g (93%) of ethyl (3-(4-hydroxy-3-methoxybenzyl)-6-(1-methyl-1H-pyrazol-4-yl)-3H-imidazo[4,5-b]pyridin-2-yl)carbamate as a white solid.

Provenance & Evidence