Hydrochloric Acid → 8-[(3,3-Difluorocyclobutyl)methoxy]-2,6-dimethylimidazo[1,2-a]pyridine-3-carboxylic acid

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Reaction Steps

2.39 g (7.06 mmol) of ethyl 8-[(3,3-difluorocyclobutyl)methoxy]-2,6-dimethylimidazo[1,2-a]-pyridine-3-carboxylate Example 106A were dissolved in 151 ml of THF/methanol (5:1), 35.3 ml (35.3 mmol) of 1 N aqueous lithium hydroxide solution were added and the mixture was stirred at RT for 2 d. The reaction mixture was acidified with 1 N aqueous hydrochloric acid solution to pH 4 and concentrated. The solid was filtered off, washed with water and dried under high vacuum. This gave 1.63 g (71% of theory; purity 95%) of the title compound.

Provenance & Evidence