反应详情

18.4 g of cyanuric chloride and 34.0 g of 2,2,6,6-tetramethyl-4-(methylamino)piperidine were dissolved in 250 ml of xylene, and the solution was stirred at a temperature of 90°-110° C. for 3 hours. 30 ml of a saturated aqueous solution of potassium carbonate were then added and the resulting mixture was heated under reflux for 5 hours. At the end of this time, the reaction mixture was poured into water and extracted with benzene. The extract was dried over anhydrous potassium carbonate and then the benzene was distilled off. The residue was recrystallized from ethyl acetate, giving the title compound in the form of crystals melting at 179°-180° C.

1. temperaturethe resulting mixture was heated
2. temperatureunder reflux for 5 hours
3. extractionextracted with benzene
4. dry with materialThe extract was dried over anhydrous potassium carbonate
5. distillationthe benzene was distilled off
6. customThe residue was recrystallized from ethyl acetate