反应详情

温度

80 °C

To a mixture of 5-cyclohexyl-3-hydroxy-1-(4-isoxazol-3-ylphenyl)-4-(4-methoxycarbonylbenzoyl)-1,5-dihydropyrrol-2-one (1.98 g, 4.07 mmol), THF (20 mL) and methanol (13 mL) was added aqueous 2N sodium hydroxide (5.09 mL). The mixture was stirred at 80° C. for 2 hr. To the mixture was added 2N hydrochloric acid (5.09 mL) under ice-cooling conditions, and ethyl acetate and water were added. The mixture was stirred at r.t. overnight. The precipitate was collected by filtration to give 5-cyclohexyl-3-hydroxy-1-(4-isoxazol-3-ylphenyl)-4-(4-carboxybenzoyl)-1,5-dihydropyrrol-2-one (1.70 g, 88%) as yellow crystals.

1. additionwere added
2. stirringThe mixture was stirred at r.t. overnight
3. filtrationThe precipitate was collected by filtration