反应详情

温度

80 °C

7-(Benzyloxy)quinazolin-4(3H)-one (5 g, 19.8 mmol) was treated with thionyl chloride (50 mL) and anhydrous N,N′-dimethylformamide (0.5 mL) and heated to 80° C. for 1.5h. The solvent was removed under reduced pressure and the residue dissolved in dichloromethane, cooled to 0° C. and the pH adjusted to basic (pH=8) with a saturated solution of sodium bicarbonate. The organic layer was separated, the water extracted with ethyl acetate and the organics combined, dried (MgSO4) and concentrated under reduced pressure to give 7-(benzyloxy)-4-chloroquinazoline (4.75 g, 89%), which was used directly in the next step without further purification. 1H NMR (300 MHz, DMSO-d6) δ 9.13 (s, 1H), 8.18 (d, 1H), 7.97-7.46 (m, 4H), 7.46-7.35 (m, 4H), 5.35 (s, 2H); LC-MS (ESI) m/z 271 (M+H)+.

1. customThe solvent was removed under reduced pressure
2. dissolutionthe residue dissolved in dichloromethane
3. temperaturecooled to 0° C.
4. customThe organic layer was separated
5. extractionthe water extracted with ethyl acetate
6. dry with materialdried (MgSO4)
7. concentrationconcentrated under reduced pressure