反应详情

A solution of 4-(4-bromobenzylamino)-2,6-dimethyl-5-(1-ethoxyvinyl)pyrimidine (2.72 g, 7.51 mmol), 1N HCl (8.3 mL), and acetone (8 mL) was heated under reflux for 2.5 h. The acetone was removed under reduced pressure and the aqueous phase was adjusted to pH 4 with 1N KOH. The resultant white precipitate was collected by filtration to give 2.24 g (89%) of product as a white solid. An analytical sample was recrystallized from hexane, mp 78°-80° C.

1. temperatureunder reflux for 2.5 h
2. customThe acetone was removed under reduced pressure
3. filtrationThe resultant white precipitate was collected by filtration