反应详情

A solution of 1,5-dichloro-4-methoxyisoquinoline (1.2 g, 5.26 mmol) in DCM (15 ml) was added BBr3 (9.23 g, 34.8 mmol) at 0° C. drop wise. The reaction mass was refluxed for 5 h. The residue was cooled and quenched with methanol. The solvent was evaporated under reduced pressure and the residue was diluted with cold water. The precipitated solid was filtered, washed with water to get crude compound (0.7 g, 62.2%) as light brown color solid. 1H NMR (400 MHz, CD3OD): δ ppm 8.28-8.25 (d, J=12 Hz, 1H), 7.85-7.82 (m, 2H), 7.68-7.64 (m, 1H); MS: MS m/z 214.0 (M++1).

1. temperatureThe reaction mass was refluxed for 5 h
2. temperatureThe residue was cooled
3. customquenched with methanol
4. customThe solvent was evaporated under reduced pressure
5. additionthe residue was diluted with cold water
6. filtrationThe precipitated solid was filtered
7. washwashed with water