反应详情

To a stirred suspension of 2-amino-9-(4-hydroxy-3-hydroxymethylbut-1-yl)purine hydrochloride (0.79 g), 4-dimethylaminopyridine (16 mg) and triethylamine (1.4 ml) in dichloromethane (16 ml) at room temperature was added acetic anhydride (0.57 ml). The resulting mixture was stirred at ambient temperature for 2.25 hours. Methanol (4 ml) was added and the solution stirred for 30 min before being evaporated to dryness. Water (20 ml) was added and the aqueous solution extracted with dichloromethane (3×20 ml). The combined extracts were concentrated to give an oil. This oil was dissolved in 2-propanol (5 ml), the solvent evaporated and the residue recrystallised from 2-propanol (5 ml). The product was collected by filtration, washed with 2-propanol (3 ml) and dried to give the title compound (654 mg, 70%).

1. stirringthe solution stirred for 30 min
2. custombefore being evaporated to dryness
3. additionWater (20 ml) was added
4. extractionthe aqueous solution extracted with dichloromethane (3×20 ml)
5. concentrationThe combined extracts were concentrated
6. customto give an oil
7. customthe solvent evaporated
8. customthe residue recrystallised from 2-propanol (5 ml)
9. filtrationThe product was collected by filtration
10. washwashed with 2-propanol (3 ml)
11. customdried