反应详情

4,6-dihydroxypyrimidine (25.0 g, 0.223 mol) and potassium carbonate (65.1 g, 0.471 mol) are combined in 0.5 L anhydrous dimethylformamide. Benzyl chloride (55.7 g, 0.439 mol) is added dropwise over 30 minutes with stirring. After 4 h the solution is filtered, and the filtrate concentrated in vacuo. The residue is washed with acetonitrile, and the product is collected as a white solid by filtration (44.6 g, 68%). 1H-NMR (400 MHz, DMSO-d6) δ 8.06 (m, 2 H), 7.61 (quartet, J=8.45 Hz, 1H), 7.30 (t, J=10.37 Hz, 1H), 7.12, (t, J=8.45 Hz, 1H), 7.09 (d, J=5.06 Hz, 2H), 5.14 (s, 2H). LC/MS tr=5.29 minutes (0-95% acetonitrile/water, 0.05% trifluoroacetic acid, over 6 minutes at 1 ml/min with detection at 215 nm, at 50° C.) ES-MS m/z 293 (M+H).

1. filtrationAfter 4 h the solution is filtered
2. concentrationthe filtrate concentrated in vacuo
3. washThe residue is washed with acetonitrile
4. filtrationthe product is collected as a white solid by filtration (44.6 g, 68%)
5. customLC/MS tr=5.29 minutes (0-95% acetonitrile/water, 0.05% trifluoroacetic acid, over 6 minutes at 1 ml/min with detection at 215 nm, at 50° C.) ES-MS m/z 293 (M+H)