Carbazole → 9-(4-Biphenylyl)carbazole

Participants

Reaction Conditions

Reaction Steps

12 g (50 mmol) of 4-bromobiphenyl, 8.4 g (50 mmol) of carbazole, 230 mg (1 mmol) of palladium acetate, 1.8 g (3.0 mmol) of 1,1-bis(diphenylphosphino)ferrocene, and 13 g (180 mmol) of sodium-tert-butoxide were put in a three-neck flask and the atmosphere of the flask was substituted by nitrogen, and then, 80 mL of dehydrated xylene was added thereto, and deaeration was performed. Under a nitrogen atmosphere, it was heated and stirred at 120° C. for 7.5 hours. After the termination of the reaction, about 600 mL of hot toluene was added to this suspension, and filtered twice through florisil, alumina, and Celite®. The obtained filtrate was concentrated, hexane was added thereto, and recrystallization was conducted. This was filtered, and the residue was collected and dried to obtain 14 g (yield: 87%) of 9-(4-biphenylyl)carbazole which was cream-colored powder.

Provenance & Evidence