反应详情

To a solution of phosphorus oxychloride (50 mL) was added powdered 6-bromo-2-methylamino-1H-quinazolin-4-one (10.0 g, 39.4 mmol) followed by dimethyl-phenyl-amine (8 mL) and the mixture was heated to reflux under N2 atmosphere for half an hour. After cooling down, the mixture was poured onto ice and basified with aqueous NaOH solution (2 M). The precipitate was collected by filtration and purified by column to afford (6-bromo-4-chloro-quinazolin-2-yl)-methyl-amine (5 g, 18.3 mmol, 46.6%) as a yellow solid. 1H NMR (DMSO-d6): δ 8.03 (s, 1H), 7.86-7.84 (m, 2H), 7.47-7.45 (d, 1H), 2.86-2.84 (d, 3H).

1. temperaturethe mixture was heated
2. temperatureto reflux under N2 atmosphere for half an hour
3. temperatureAfter cooling down
4. filtrationThe precipitate was collected by filtration
5. custompurified by column