反应详情

温度

0 °C

N2-Isobutyryl-9-(2′-isobutyryl-3′,5′-di-O-[tetrahydropyran-2-yl]-β-D-arabinofuranosyl)guanine (5.58 g) was dissolved in pyridine-MeOH-H2O (65:30:15, 52 mL) at room temperature. The solution was cooled to 0° C. and 52 mL of 2 N NaOH in EtOH-MeOH (95:5) was added slowly, followed by stirring for 2 hours at 0° C. Glacial acetic acid was added to pH 6, and saturated NaHCO3 was added to pH 7. The reaction mixture was evaporated under reduced pressure and the residue coevaporated with toluene. The residue was then dissolved in EtOAc (150 mL) and washed 3× with saturated NaHCO3. The organic phase was evaporated and the residue purified by silica gel column chromatography using EtOAc-MeOH (95:5) as the eluent, yielding 3.85 g (78.3%) of product.

1. additionwas added to pH 7
2. customThe reaction mixture was evaporated under reduced pressure
3. dissolutionThe residue was then dissolved in EtOAc (150 mL)
4. washwashed 3× with saturated NaHCO3
5. customThe organic phase was evaporated
6. customthe residue purified by silica gel column chromatography