反应详情

To a mixture of 5-cyclohexyl-3-hydroxy-1-(4-isoxazol-3-ylphenyl)-4-(4-carboxybenzoyl)-1,5-dihydropyrrol-2-one (0.095 g, 0.2 mmol) and DMF (2 mL) was added, methylamine hydrochloride (0.020 g, 0.3 mmol), 1-hydroxybenztriazole (0.041 g, 0.3 mmol), 4-dimethylaminopyridinium (0.005 g, 0.04 mmol), 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (0.058 g, 0.3 mmol) and triethylamine (0.042 mL, 0.3 mmol). The mixture was stirred at r.t. for 1 hr. Ethyl acetate and water were added, and the precipitate was collected by filtration to give 5-cyclohexyl-3-hydroxy-1-(4-isoxazol-3-ylphenyl)-4-(4-methylcarbamoylbenzoyl)-1,5-dihydropyrrol-2-one (0.062 g, 64%) as pale yellow crystals.

1. additionwas added
2. filtrationthe precipitate was collected by filtration