反应详情

65.4 Parts of pyromellitic acid dianhydride and 61 parts of 3-hydroxy-2-methyl-quinoline-4-carboxylic acid are heated under reflux at 205° in 1000 parts of nitrobenzene for 1 hour, distilling off the water produced by the reaction. The mixture is held at this temperature for 31/2 hours. The mixture is then cooled to 10° and after stirring at this temperature for 1 hour, is filtered and the product is washed in toluene and ethanol. 93 parts of a dark brown quinophthalone intermediate result.

1. distillationdistilling off the water
2. customproduced by the reaction
3. custom2 hours
4. temperatureThe mixture is then cooled to 10°
5. filtrationis filtered
6. washthe product is washed in toluene