反应详情

温度

40 °C

A mixture of 7-benzyl-3,7-dihydropurine-2,6-dione (3.0 g), anhydrous potassium carbonate (2.0 g), and N,N-dimethylformamide (60 ml) was stirred with heating in an oil bath of 40° C., and ethyl bromoacetate (1.5 g) was added thereto. The mixture was stirred by heating at the same temperature for 4 hours. The reaction mixture was diluted with ethyl acetate and water, and extracted with ethyl acetate. The organic layer was washed with water and saturated brine, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography using 20–40% (20% 2-propanol/ethyl acetate)/hexane to give 1.3 g of the title compound.

1. stirringThe mixture was stirred
2. temperatureby heating at the same temperature for 4 hours
3. extractionextracted with ethyl acetate
4. washThe organic layer was washed with water and saturated brine
5. dry with materialdried over anhydrous magnesium sulfate
6. concentrationconcentrated under reduced pressure
7. customThe residue was purified by silica gel column chromatography