反应详情

(R)-2-(1-Acetoxy-ethyl)-3H-pyrimidin-4-one (prepared according to the method of Preparation Thirteen, 3.00 g, 16.5 mmol) was added to phosphorus oxychloride (10 mL) at ambient temperature and stirred for 3 h. Excess phosphorus oxychloride was removed under vacuum and the resulting oil was partitioned between chloroform and saturated aqueous sodium carbonate. The layers were separated and the organic layer was washed twice with water, once with saturated aqueous sodium chloride and dried over magnesium sulfate and filtered. The filtrate was evaporated to give the title compound as an orange oil, 2.88 g (87%). 1H NMR (CDCl3, 300 MHz) δ 1.56 (d, 3H), 2.18 (s, 3H), 5.68 (q, 1H), 6.32 (d, 1H), 8.21 (d, 1H); MS (Cl) 201, 203 (MH+); [α]D+27.6 (c, 1.0, MeOH).

1. customaccording to the method of Preparation Thirteen, 3.00 g, 16.5 mmol)
2. customExcess phosphorus oxychloride was removed under vacuum
3. customthe resulting oil was partitioned between chloroform and saturated aqueous sodium carbonate
4. customThe layers were separated
5. washthe organic layer was washed twice with water, once with saturated aqueous sodium chloride
6. dry with materialdried over magnesium sulfate
7. filtrationfiltered
8. customThe filtrate was evaporated