Trifluoroacetic acid → N-(6-hydroxy-3-methylimidazo[1,2-a]pyridin-2-yl)cyclopropanecarboxamide

Participants

Reaction Steps

To a solution of N-{6-[(4-methoxybenzyl)oxy]-3-methylimidazo[1,2-a]pyridin-2-yl}cyclopropanecarboxamide (700 mg, 1.99 mmol) and anisole (1.73 mL, 15.9 mmol) in trifluoromethylbenzene (7 mL) was added trifluoroacetic acid (1.4 mL), and the mixture was stirred at room temperature for 2 hr. Saturated aqueous sodium hydrogen carbonate solution was added to the reaction mixture, and the mixture was extracted 4 times with ethyl acetate. The organic layer was washed with saturated brine, dried over anhydrous magnesium sulfate and filtered. The solvent was evaporated under reduced pressure. The obtained residue was washed with ethyl acetate to give the title compound (65 mg, 14%) as a slightly-yellow solid.

Provenance & Evidence