反应详情

Preparing 32.7 g of 2,7-dibromo-9,10-dihydrophenanthrene, 24.1 g of 2,3-dichloro-5,6-dicyanobenzoquinone (DDQ) and 500 milliliter of benzene as a mixture solution, the solution was refluxed with heating under an ambient atmosphere of argon gas for 64 hours. The reacted solution was cooled down to a room temperature, and further filtered. Concentrating the filtrate by means of an evaporator, the residue was washed with a use of methanol. After refining the filtered product by means of a short column, the refined product was re-crystallized with a use of toluene and as a result, 15.5 g of 2,7-dibromophenanthrene was obtained as colorless needle crystals.

1. temperaturethe solution was refluxed
2. temperaturewith heating under an ambient atmosphere of argon gas for 64 hours
3. concentrationConcentrating the filtrate
4. customby means of an evaporator
5. washthe residue was washed with a use of methanol
6. customthe refined product was re-crystallized with a use of toluene and as a result