反应详情

温度

65 °C

2-Amino-4-(1,2-dimethylimidazol-5-yl)pyrimidine (Method 26; 378 mg, 2 mmol) and N-chlorosuccimide (267 mg, 2 mmol) were dissolved in glacial acetic acid (7 ml) under an atmosphere of nitrogen. The reaction mixture was heated at 65° C. for 18 hours when further N-chlorosuccinimide (89 mg, 0.66 mmol) was added and the reaction heated at 65° C. for an additional 2 hours. The volatiles were removed by evaporation and the residue dissolved in water (10 ml). The solution was adjusted to pH 11-12 by addition of 40% aqueous sodium hydroxide solution. The precipitated solid was collected by filtration and washed sparingly with water, dried under vacuum at 60° C. to give the title compound (344 mg, 77%) as a yellow solid. NMR 2.35 (s, 3H, 3.75 (s, 3H), 4.83 (s, 2H), 7.53 (s, 1H), 8.27 (s, 1H); m/z 224.

1. additionwas added
2. customThe volatiles were removed by evaporation
3. dissolutionthe residue dissolved in water (10 ml)
4. additionThe solution was adjusted to pH 11-12 by addition of 40% aqueous sodium hydroxide solution
5. filtrationThe precipitated solid was collected by filtration
6. washwashed sparingly with water
7. customdried under vacuum at 60° C.