反应详情

To a solution of 4(3H)-quinazolinone (2.19 g, 15.0 mol) in anhydrous DMF (10 mL) was added NaH (60% dispersion in mineral oil, 0.719 g, 18.0 mmol) in two portions with caution. The mixture was stirred at rt for 30 min. 3-Nitrophenacyl bromide (4.39 g, 18.0 mmol) was added and the resulting suspension was stirred at rt for 16 h. Solvent was removed under reduced pressure. To the residue were added water (10 mL) and 4 N HCl (aq) to adjust the pH to ≈6. The solid material was collected by filtration, washed with water (20 mL) and dichloromethane (3×20 mL) to afford the title compound as a white powder. 1H-NMR (CD3OD, 400 MHz): δ=5.70 (d, J=10.0 Hz, 2H), 7.60 (d, J=7.2 Hz, 1H), 7.76 (d, J=8.4 Hz, 1H), 7.86-7.91 (m, 2H), 8.25 (d, J=8.0 Hz, 1H), 8.30 (s, 1H), 8.51-8.58 (m, 2H), 8.90 (t, J=1.2 Hz, 1H). MS (ES+): m/z 310.06 [MH+]. HPLC: tR=2.90 min (ZQ2000, polar—5 min).

1. stirringthe resulting suspension was stirred at rt for 16 h
2. customSolvent was removed under reduced pressure
3. additionTo the residue were added water (10 mL) and 4 N HCl (aq)
4. filtrationThe solid material was collected by filtration
5. washwashed with water (20 mL) and dichloromethane (3×20 mL)