反应详情

To [1,4]benzodioxino[2,3-c]pyridazin-3-ylmethanol (8.1 g) was added 1,2-dichloroethane (80 ml) and the mixture was stirred. Thionyl bromide (38.9 g) was added, and the mixture was stirred with heating under reflux for 2 hr. The mixture was diluted with chloroform, and the organic layer was washed with saturated aqueous sodium hydrogen carbonate solution, and dried over anhydrous sodium sulfate. The solvent was concentrated under reduced pressure, and the residue was washed with diethyl ether to give 3-(bromomethyl)[1,4]benzodioxino[2,3-c]pyridazine (8.0 g).

1. stirringthe mixture was stirred
2. temperaturewith heating
3. temperatureunder reflux for 2 hr
4. washthe organic layer was washed with saturated aqueous sodium hydrogen carbonate solution
5. dry with materialdried over anhydrous sodium sulfate
6. concentrationThe solvent was concentrated under reduced pressure
7. washthe residue was washed with diethyl ether