反应详情

To a stirred solution of 3.3 g of ethyl p-aminobenzoate in 60 ml of acetone was added 1.46 g of 3-methylisoxazole-5-carbonyl chloride. The mixture was stirred at room temperature for 1 hr. and then refluxed for 1 hr. The solvent was removed and the residue was washed with 5% hydrochloric acid, 5% potassium carbonate and water. Recrystallization from a mixture of benzene and n-hexane gave 1.6 g of pure product. Melting point: 160°-163° C. Yield: 58.4%.

1. temperatureand then refluxed for 1 hr
2. customThe solvent was removed
3. washthe residue was washed with 5% hydrochloric acid, 5% potassium carbonate and water
4. customRecrystallization
5. additionfrom a mixture of benzene and n-hexane