反应详情

To a hot solution of 3,9-dimethylbenzo[f]quinazolin-1(2H)-one (4.00 g, 17.9 mmol) in benzene (2000 ml) under nitrogen was added N-bromo-succinimide (4.00 g, 22.5 mmol). The reaction mixture was stirred just below reflux for 30 minutes, then at a gentle reflux for 30 minutes. The resulting suspension was allowed to cool for 2 hours, the solid filtered and dried at 70° C. under reduced pressure to give 9-bromomethyl-3-methylbenzo[f]quinazolin-1(2H)-one (4.32 g, 83% purify by NMR).

1. temperaturebelow reflux for 30 minutes
2. temperatureat a gentle reflux for 30 minutes
3. temperatureto cool for 2 hours
4. filtrationthe solid filtered
5. customdried at 70° C. under reduced pressure