Lithium Hydroxide → cis(+/-)-2-(Acetylamino)-5-(4-{[(4-chloro-5-ethyl-1H-imidazol-2-yl)carbonyl]amino}-3-methoxypiperidin-1-yl)benzoic acid

Participants

Reaction Conditions

Reaction Steps

Methyl cis(±)-2-(acetylamino)-5-(4-{[(4-chloro-5-ethyl-1H-imidazol-2-yl)carbonyl]amino}-3-methoxypiperidin-1-yl)benzoate obtained in Example (185e) (120 mg) was dissolved in methanol (4 ml) and THF (4 ml). A 2 N aqueous lithium hydroxide solution (2 ml) was added, and the mixture was stirred at 70° C. for one hour. The organic solvent was evaporated under reduced pressure, followed by neutralization with 1 N hydrochloric acid and extraction with ethyl acetate. The organic layer was dried over anhydrous sodium sulfate. Following concentration under reduced pressure, the residue was recrystallized from an ethyl acetate/methanol/hexane solvent to obtain 90 mg of the title compound as crystals.

Provenance & Evidence