9,10-Phenanthrenedione → 2-(3-Bromophenyl)dibenzo[f,h]quinoxaline

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Reaction Steps

First, in a 500 mL three-neck flask were put 2.5 g of 1-(3-bromophenyl)ethane-1,2-diamine, 0.62 g of potassium hydroxide, and 200 mL of dry ethanol, and the air in the flask was replaced with nitrogen. The solution in the flask was refluxed for 2 hours, 2.1 g of 9,10-phenanthrenequinone was added thereto, and the solution was refluxed for 9 hours. After that, the obtained mixture was suction-filtered, and the resulting solid was washed with ethanol to give 2-(3-bromophenyl)dibenzo[f,h]quinoxaline as a yellow-white solid in a yield of 70%.

Provenance & Evidence