4-Bromophenacyl bromide → 1-(4-bromophenyl)-8,9-dihydro-7H-pyrrolo[3,2,1-ij]quinolin-7-one

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Reaktionsschritte

5,6,7,8-Tetrahydroquinolin-5-one (20 g) was dissolved in 500 ml of toluene. To this solution was added 4-bromophenacyl bromide (37.8 g) gradually and refluxed for 18 hours. The reaction mixture was cooled to room temperature, and depositing solids were collected by filtration (33 g). These crystals were dissolved in 300 ml of N,N-dimethylformamide. To this solution was added, molecular sieves 3A (15 g) and triethylamine (13 ml), and the reaction mixture was heated at 100 ° C. for 1 hour. The reaction mixture became dark brown. The dark brown solution that obtained after removing insoluble matter by filtration was concentrated under reduced pressure. To the residue was added 300 ml of water and extracted with 200 ml of methylene chloride three times. The methylene chloride solution was washed with 100 ml of brine and dried over anhydrous sodium sulfate. The dark brown solution that obtained after removing drying agent by filtration was concentrated under reduced pressure, the resultant dark brown residue was purified by alumina column chromatography. The title compound was obtained as dark brown crystals (12 g).

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