2-Fluorobenzoyl chloride → 11-(2-Ethylhexyl)-8-(2-fluorobenzoyl)-11H-benzo[a]carbazole-5-yl-(2,4,6-trimethylphenyl)-methanone

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Reaction Steps

To 11-(2-ethylhexyl)-11H-benzo[a]carbazole (47.16 g; 143.0 mmol) in CH2Cl2 (400 mL) are added 2,4,6-trimethylbenzoyl chloride (27.45 g; 150.0 mmol) and AlCl3 (20.00 g; 150.0 mmol) at 0° C. After stirring at room temperature for 2 hours, AlCl3 (22.93 g; 172.0 mmol) is added at 0° C. and 2-fluorobenzoyl chloride (23.78 g; 150.0 mmol) is added dropwise, and then the mixture is stirred at room temperature for 3 hours. The reaction mixture is poured into ice-water, and the crude product is extracted twice with CH2Cl2. The combined organic layer is washed with water and brine, dried over MgSO4. After 230 ml of n-hexane are added, the CH2Cl2 is removed by concentration to give a beige solid. It is collected by filtration, and washed with n-hexane. Then it is dried to give a beige solid (81.81 g; 95.7%). The structure is confirmed by 1H-NMR spectrum (CDCl3). δ [ppm]: 0.84 (t), 0.89 (t), 1.18-1.42 (m), 2.20 (s), 2.28-2.31 (m), 2.40 (s), 4.72-4.76 (m), 6.96 (s), 7.19 (t), 7.29 (t), 7.52-7.60 (m), 7.70-7.84 (m), 8.38 (s), 8.63-8.66 (m), 9.56 (d); 19F-NMR spectrum (CDCl3). δ [ppm]: −111.58.

Provenance & Evidence