Acetic Acid → 5-bromo-7-methylquinazolin-4(3H)-one
Reaktionsgleichung
[CH3:1][C:2]1[CH:11]=[C:10]2[C:5]([C:6](=[O:12])[NH:7][CH:8]=[N:9]2)=[CH:4][CH:3]=1.CO.CC(O)=O.[Br:19]Br>>[Br:19][C:4]1[CH:3]=[C:2]([CH3:1])[CH:11]=[C:10]2[C:5]=1[C:6](=[O:12])[NH:7][CH:8]=[N:9]2Komponenten
5
Versuchsvorschrift
To a solution of 7-methylquinazolin-4(3H)-one (900 mg, 5.63 mmol) in MeOH (180 mg, 5.63 mmol) and AcOH (5.07 g, 84.45 mmol) was added bromine (300 μL, 5.63 mmol) and the reaction mixture was stirred at rt for 4 h. Then the reaction mixture was quenched with an aq. solution of sodium thiosulphate. The precipitate obtained was filtered and dried to afford 900 mg of the title product. 1H NMR (300 MHz, DMSO-d6): δ 12.24 (br s, 1H), 8.18 (s, 1H), 8.08 (s, 1H), 7.66 (s, 1H), 2.48 (s, 3H).