Water → 3-Cyclopropyl-6-{(E)-1-[3-methoxy-4-(methylsulfonyl)phenyl]-2-[(2R)-5-oxopyrrolidin-2-yl]ethenyl}pyridin-2(1H)-one

Participants

Reaction Conditions

Reaction Steps

A 28% solution of sodium methoxide in methanol (14 μL) was added to a solution of 3-cyclopropyl-6-{(E)-1-[3-fluoro-4-(methylsulfonyl)phenyl]-2-[(2R)-5-oxopyrrolidin-2-yl]ethenyl}pyridin-2(1H)-one obtained in Example 4-386 (10 mg) in methanol (0.5 mL), after which the mixture was stirred at 70° C. for 30 minutes. The reaction solution was left to cool to room temperature. 3-Cyclopropyl-6-{(E)-1-[3-fluoro-4-(methylsulfonyl)phenyl]-2-[(2R)-5-oxopyrrolidin-2-yl]ethenyl}pyridin-2(1H)-one (50 mg), methanol (3 mL) and a 28% solution of sodium methoxide in methanol (80 μL) were then added, after which the mixture was stirred at 70° C. for two hours. The reaction solution was left to cool to room temperature and a 28% solution of sodium methoxide in methanol (1 mL) was then added, after which the mixture was stirred at 70° C. for one hour. The reaction solution was left to cool to room temperature, and water was then added to the reaction solution, followed by extraction with ethyl acetate. The organic layer was washed with water and brine, dried over anhydrous magnesium sulfate and filtered, after which the solvent was evaporated under reduced pressure. The residue was purified by NH-silica gel column chromatography (methanol:ethyl acetate=1:10) to give the title compound as a pale yellow solid (40 mg, 65%).

Provenance & Evidence