Hydrogen Bromide → 2-(5-bromomethyl-3,4-dihydro-1H-isoquinolin-2-yl)-6,7-dimethoxy-3H-quinazolin-4-one
Reaction equation
O[CH2:2][C:3]1[CH:12]=[CH:11][CH:10]=[C:9]2[C:4]=1[CH2:5][CH2:6][N:7]([C:13]1[NH:22][C:21](=[O:23])[C:20]3[C:15](=[CH:16][C:17]([O:26][CH3:27])=[C:18]([O:24][CH3:25])[CH:19]=3)[N:14]=1)[CH2:8]2.[BrH:28]>>[Br:28][CH2:2][C:3]1[CH:12]=[CH:11][CH:10]=[C:9]2[C:4]=1[CH2:5][CH2:6][N:7]([C:13]1[NH:22][C:21](=[O:23])[C:20]3[C:15](=[CH:16][C:17]([O:26][CH3:27])=[C:18]([O:24][CH3:25])[CH:19]=3)[N:14]=1)[CH2:8]2Participants
3
Procedure
2-(5-Hydroxymethyl-3,4-dihyd ro-1H-isoquinolin-2-yl)-6,7-dimethoxy-1H-quinazolin-4-one 22a (0.2 g, 0.54 mmol) was dissolved to room temperature in 5 mL of 48% hydrobromic acid and stirred to room temperature for 24 h. The precipitated product was separated by filtration, rinsed with water, dried to yield 0.21 g (91%) 2-(5-bromomethyl-3,4-dihydro-1H-isoquinolin-2-yl)-6,7-dimethoxy-3H-quinazolin-4-one 23a.