反应详情

3.66 Grams of 3-(2-tetrahydrofuranyl)-2'-deoxy-5-trifluoromethyluridine was dissolved in 40 ml of acetone. Thereto were added 5.13 g of benzyl bromide and 5.79 g of silver oxide. The mixture was stirred for 5 hours with refluxing. The reaction mixture was filtered and the filtrate was concentrated. The residue was subjected to silica gel column chromatography (developing solvent : chloroform-methanol=40 : 1). The eluate was recrystallized from dichloromethane-petroleum ether to obtain 0.19 g yield: 4.1%) of 3-(2-tetrahydrofuranyl)-2'-deoxy-5'-O-benzyl-5-trifluoromethyluridine (compound 21) having the melting point of 145° to 147° C.

1. temperaturewith refluxing
2. filtrationThe reaction mixture was filtered
3. concentrationthe filtrate was concentrated
4. customThe eluate was recrystallized from dichloromethane-petroleum ether