preparation | add 5mL toluene, 1.0g(12mmol) carbazole, 50mL 50% NaOH aqueous solution and 0.8gBTEAC into a 100mL two-mouth round bottom flask, add 120mmol decadecane -9-bromide dropwise into the reaction flask under magnetic stirring at room temperature, and install a spherical condenser tube after dropwise addition, the reflux reaction was carried out for 2-3h, and thin layer chromatography (TLC) was used to track and monitor the reaction during the reaction. After the reaction is over, pour the reaction mixture into 100mL of ice-water mixture, let stand for 5min, add dichloromethane to the above aqueous solution for extraction three times (3 50mL), then wash the extract to neutral, collect the extract from the separatory funnel, remove the dichloromethane with a rotary evaporator to obtain the crude product, separate and purify the crude product by column chromatography, and use petroleum ether/ethyl acetate = 20/1 as the eluent to obtain colorless needle 2, 7-dibromo-9-(1-octylnonyl)-9H-carbazole with 83% yield. |