反应详情

温度

90 °C

To a solution of 6-chloro-4-ethoxy-7-methoxy-2-methyl-3-(4-(4-(trifluoromethoxy)phenoxy)phenyl)quinoline (1.16 g, 2.30 mmol) in acetic acid (10 ml) was added a 50% aqueous hydrobromic acid solution (5 ml). The reaction mixture was stirred 24 hours at 90° C., cooled and concentrated in vacuo. The resulting residue was resuspended in water, neutralized with 2 N NaOH and filtered. The collected solid was triturated with dichloromethane and filtered to provide 923 mg 6-chloro-7-methoxy-2-methyl-3-(4-(4-(trifluoromethoxy)phenoxy) phenyl) quinolin-4(1H)-one (84% yield) as a white powder. 1H NMR (400 MHz, CDCl3) δ 11.97 (s, 1H), 8.05 (s, 1H), 7.42 (d, J=8.7 Hz, 2H), 7.29 (d, J=8.3 Hz, 2H), 7.17 (d, J=8.3 Hz, 2H), 7.12 (s, 1H), 7.08 (d, J=8.7 Hz, 2H), 3.97 (s, 3H), 2.26 (s, 3H). HRMS (EI+) m/z for C24H17ClF3NO4: calculated 475.0798, found 475.0801.

1. temperaturecooled
2. concentrationconcentrated in vacuo
3. filtrationfiltered
4. customThe collected solid was triturated with dichloromethane
5. filtrationfiltered