反应详情

温度

70 °C

A mixture of (4-acetylamino-phenyl)-acetic acid (15 g, Reference Example 15) phthallic anhydride (15.8 g) and triethylamine (42.3 mL) was heated at 70° C. for 3 minutes then treated with acetic anhydride (105.8 mL). The mixture was heated on a steam bath at approximately 70° C. until evolution of carbon dioxide ceased. The resulting deep red solution was evaporated and the residue was treated with water (750 mL) then heated on a steam bath for 2 hours. The insoluble material was filtered, dried under vacuum and then subjected to chromatography on silica eluting with mixtures of dichloromethane and methanol (99:5 to 50:50, v/v) to give the title compound.

1. customThe resulting deep red solution was evaporated
2. additionthe residue was treated with water (750 mL)
3. temperaturethen heated on a steam bath for 2 hours
4. filtrationThe insoluble material was filtered
5. customdried under vacuum