O-Phenylenediamine → 2,3-Bis(4-bromophenyl)quinoxaline

Participants

Reaction Conditions

Reaction Steps

30.2 g of 4,4′-dibromobenzil (82.0 mmol), 9.31 g of 1,2-phenylenediamine (86.1 mmol), and 300 mL of chloroform were put into a 500 mL three-necked flask. This reaction solution was refluxed for five hours at 80° C. under a nitrogen gas stream. After the reaction, the reaction solution was cooled to room temperature and washed with water. A water layer was extracted with chloroform, the extracted solution and an organic layer were dried by magnesium sulphate. After drying, the mixture was filtrated by suction to concentrate the filtrate. The obtained solid was dissolved in toluene and this solution was filtrated by suction through Florisil, celite, and alumina. The filtrate was condensed, and 30 g of an objective matter, a white powder solid, 2,3-bis(4-bromophenyl)quinoxaline was obtained at the yield 99%.

Provenance & Evidence