反应详情

温度

35 °C

6-Iodopurine (Sigma Chemical Co. St. Louis, Mo.) (4 mmoles, 1 g) was dissolved in 15 ml of 1,2-dimethoxyethane with heating. Fifty milliliters of a uracil arabinoside solution (10.1 mmoles) in 10 mM potassium phosphate, 0.04% potassium azide solution, pH of 7.4, were added. Purified uridine phosphorylase (6800 I.U.) and purine nucleoside phosphorylase (12000 I.U.) were added and the reaction stirred at 35° C. After 21 days an additional 4800 units of uridine phosphorylase and 20000 units of purine nucleoside phosphorylase were added. Ninety days later the reaction was filtered and the solvent removed under vacuum. The residue was suspended in 100 ml of water, heated with steam, and then filtered. The filtrate was chromatographed on a column containing XAD-2 resin (5×35 cm), eluting with 2 liters of water followed by 2 liters ethanol. Fractions containing product were combined and the solvent removed under vacuum. The residue was dissolved in 30% n-propanol/water (v/v) and chromatographed on a column containing BioRad P-2 (5×90 cm). The product was eluted with 30% n-propanol/water (v/v). Product-containing fractions were combined and the solvent removed under vacuum. The residue was dissolved in 30% n-propanol/water (v/v) and chromatographed on a Sephadex G-10 column (5×90 cm). This column was eluted with 30% n-propanol/water (v/v). Product-containing fractions were combined and after removing the solvent under vacuum, yielded 0.253 g of 9-β-D-arabinofuranosyl-6-iodo-9H-purine that analyzed as a 1.5 hydrate. NMR and mass spectrometry were consistent with the structure. Anal. Calcd. for C10H11IN4O4.1.5 H2O: Calcd: C, 29.65; H, 3.48; N, 13.83; I, 31.32. Found: C, 29.43; H, 3.53; N, 13.66; I, 31.20.

1. temperaturewith heating
2. filtrationNinety days later the reaction was filtered
3. customthe solvent removed under vacuum
4. temperatureheated with steam
5. filtrationfiltered
6. customThe filtrate was chromatographed on a column
7. additioncontaining XAD-2 resin (5×35 cm)
8. washeluting with 2 liters of water
9. additionFractions containing product
10. customthe solvent removed under vacuum
11. dissolutionThe residue was dissolved in 30% n-propanol/water (v/v)
12. customchromatographed on a column
13. additioncontaining BioRad P-2 (5×90 cm)
14. washThe product was eluted with 30% n-propanol/water (v/v)
15. customthe solvent removed under vacuum
16. dissolutionThe residue was dissolved in 30% n-propanol/water (v/v)
17. customchromatographed on a Sephadex G-10 column (5×90 cm)
18. washThis column was eluted with 30% n-propanol/water (v/v)
19. customafter removing the solvent under vacuum