Hydrochloric Acid → (2-Chloro-4-imidazo[4,5-b]pyridin-3-yl-phenyl)-acetic acid

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Reaction Steps

A mixture of 0.325 g (2-chloro-4-imidazo[4,5-b]pyridin-3-yl-phenyl)-acetic acid ethyl ester and 2 ml of 0.5 N aqueous solution of LiOH in 2 ml of THF is stirred for 1 hour at 40 C. The mixture obtained is allowed to cool to rt and an acidic pH is adjusted by addition of 0.5 N HCl aqueous solution. A precipitate forms and is collected by vacuum filtration. (2-Chloro-4-imidazo[4,5-b]pyridin-3-yl-phenyl)-acetic acid is obtained in the form of a solid. ES-MS: 288.0 [M+H]+; single peak at tR=3.00 min (System 1).

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