Carbazole → 9-(3-Bromophenyl)-9H-carbazole

Participants

Reaction Conditions

Reaction Steps

(see Kido, J.; Su, S. -J.; Sasabe, H.; Takeda, T.; Chem. Mater. 2008, 20(5), 1691-1693, which is incorporated by reference herein for its relevant teachings) was prepared as follows: a mixture of carbazole (4.000 g, 23.92 mmol), 1,3-dibromobenzene (14.11 g, 59.81 mmol), K2CO3 (9.919 g, 71.77 mmol), copper powder (4.561 g, 71.77 mmol) and anhydrous N,N-dimethylformamide (DMF) (120 mL) was degassed with argon for 1 h. while stirring. The reaction mixture was then maintained under argon at 130° C. while stirring for 4 days until TLC (SiO2, 4:1 hexanes-dichloromethane) indicated consumption of the starting material. Upon cooling to RT, about 300 mL dichloromethane was added, the crude mixture filtered, the filtrant wash with an additional 200 mL dichloromethane, and the filtrate concentrated in vacuo. The resulting residue was then purified by flash chromatography (SiO2, hexanes) to yield Compound 3 (5.47 g, 71%) as a colorless oil.

Provenance & Evidence