反应详情

Cs2CO3 (24.6 g, 75.7 mmol) was added to 2-benzyl-3H-pyrimidin-4-one (Step 1, 12.8 g) in DMF (80 mL) and THF (60 mL) at 0° C. After 10 min, MeI (4.3 mL, 68.8 mmol) was added, and the reaction was warmed to RT. After 3 h, the reaction was decanted, diluted with CH2Cl2, and washed with H2O, and aq. sat. NaCl solution. The organic layer was dried (Na2SO4) and concentrated under reduced pressure. Et2O and Hexane (1:1) were added and the solvent was evaporated to provide a brown solid. The solid was triturated with 30′ EtOAc/hexane to afford the title compound as a light brown solid. The filtrate was purified by chromatography with 0-5% MeOH/CHCl3 to afford additional compound. MS (ESI pos. ion) m/z: 201.0. (M+H). Calc'd for C12H12N2O: 200.09.

1. waitAfter 3 h
2. customthe reaction was decanted
3. additiondiluted with CH2Cl2
4. washwashed with H2O, and aq. sat. NaCl solution
5. dry with materialThe organic layer was dried (Na2SO4)
6. concentrationconcentrated under reduced pressure
7. additionEt2O and Hexane (1:1) were added
8. customthe solvent was evaporated
9. customto provide a brown solid
10. customThe solid was triturated with 30′ EtOAc/hexane