反应详情

温度

130 °C

Sodium (2 g 87 mmol) was dissolved in benzyl alcohol (20 mL) and heated to 130° C. for 2 h. After cooling to 0° C., a solution of 2-amino-6-chloro-9-carboxymethylpurine (4.05 g, 18 mmol) in DMF (85 mL) was slowly added, and the resulting suspension stirred overnight at 20° C. Sodium hydroxide solution (1 N, 100 mL) was added and the clear solution was washed with ethyl acetate (3×100 mL). The water phase was then acidified to a pH of 3 with 4 N hydrochloric acid. The precipitate was taken up in ethyl acetate (200 mL), and the water phase was extracted with ethyl acetate (2×100 mL). The combined organic phases were washed with saturated sodium chloride solution (2×75 mL), dried with anhydrous sodium sulfate, and evaporated to dryness, in vacuo. The residue was recrystallized from ethanol (300 mL). Yield, after drying in vacuo, over sicapent: 2.76 g (52%). M.p. 159-65° C. Anal. (calc.; found): C(56.18; 55.97), H(4.38; 4.32), N(23.4; 23.10). 1H-NMR (DMSO-d6) δ: 4.82 (s, 2H); 5.51 (s, 2H); 6.45 (s, 2H); 7.45 (m, 5H); 7.82 (s, 1H).

1. temperatureAfter cooling to 0° C.
2. washthe clear solution was washed with ethyl acetate (3×100 mL)
3. extractionthe water phase was extracted with ethyl acetate (2×100 mL)
4. washThe combined organic phases were washed with saturated sodium chloride solution (2×75 mL)
5. dry with materialdried with anhydrous sodium sulfate
6. customevaporated to dryness, in vacuo
7. customThe residue was recrystallized from ethanol (300 mL)
8. customYield
9. customafter drying in vacuo