444796-09-2

591-50-4

136630-39-2

444796-09-2

General procedure for the synthesis of 2,7-dibromo-9-phenyl-9H-carbazole from 2,7-dibromocarbazole and iodobenzene: 32.5 g (100 mmol) of 2,7-dibromo-9H-carbazole, 20.4 g (100 mmol) of iodobenzene, 9.5 g (150 mmol) of copper powder, 27.6 g (200 mmol) of potassium carbonate, and 600 ml of dimethylformamide were mixed under the The reaction was heated at 130 °C under nitrogen protection overnight. After completion of the reaction, it was cooled to room temperature and the reaction mixture was filtered. The filtrate was extracted three times with dichloromethane and water, and the organic phase was dried with anhydrous magnesium sulfate, followed by evaporation under vacuum to remove the solvent. The residue was purified by silica gel column chromatography (eluent: hexane-dichloromethane) to afford the white solid product 2,7-dibromo-9-phenyl-9H-carbazole (31.3 g, 78 mmol, 78% yield).