反应详情

温度

50 °C

To a solution of 2-amino-7-(4-chlorobenzyl)-1H-purin-6(7H)-one (6.8 g, 24.7 mmol) in acetic acid (80 mL) and water (10 mL) was added a solution of sodium nitrite (3.4 g, 24.7 mmol) in water (10 mL) dropwise at 50° C. The reaction was stirred at 50° C. for 1 h. The mixture was cooled to room temperature and stirred for another 1.5 h. The precipitate was collected, washed with water and ethanol, and dried in vacuo to give 7-(4-chlorobenzyl)-1H-purine-2,6(3H,7H)-dione (6.5 g, 95.3% yield) as yellow solid. LCMS retention time 0.635 min; LCMS MH+ 277.

1. temperatureThe mixture was cooled to room temperature
2. stirringstirred for another 1.5 h
3. customThe precipitate was collected
4. washwashed with water and ethanol
5. customdried in vacuo