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

Participants

Reaction Conditions

Reaction Steps

24.06 g (70.1 mmol) of ethyl 8-[(3-fluoropyridin-2-yl)methoxy]-2,6-dimethylimidazo[1,2-a]pyridine-3-carboxylate from Example 120A were initially charged in 1.5 l of THF/methanol (5:1), 350.4 ml (350.4 mmol) of 1 N aqueous lithium hydroxide solution were added and the reaction mixture was stirred at 40° C. for 2.5 h. After cooling, the pH was adjusted to about 4 using 1 N aqueous hydrochloric acid and the solution was freed from THF/methanol under reduced pressure. The residue was cooled and the precipitated solid was filtered off and dried under reduced pressure. This gave 22.27 g (100% of theory) of the title compound.

Provenance & Evidence