Water → 5-fluoro-2-(2,3,4,5-tetrahydro-1H-1-benzoazepin-1-ylsulfonyl)-4-(1,3-dioxo-1,3-dihydroisoindol-2-yl)anisole

Beteiligte Stoffe

Reaktionsschritte

To a solution of 2,3,4,5-tetrahydro-1H-benzo[B]azepine (0.24 g), triethylamine (0.23 mL) and 4-dimethylaminopyridine (17 mg) in methylene chloride (8 mL) was added 4-fluoro-5-(1,3-dioxo-1,3-dihydroisoindol-2-yl)-2-methoxybenzenesulfonyl chloride (0.5 g), and the mixture was stirred at room temperature for 5 hours. The reaction mixture was poured into water, and the resulting mixture was extracted with ethyl acetate. The extract was washed with 1 mol/L hydrochloric acid, water and brine successively, and dried over anhydrous magnesium sulfate, and the solvent was removed under reduced pressure to give 5-fluoro-2-(2,3,4,5-tetrahydro-1H-1-benzoazepin-1-ylsulfonyl)-4-(1,3-dioxo-1,3-dihydroisoindol-2-yl)anisole (0.57 g). This material was dissolved in tetrahydrofuran (11 mL). To the solution was added hydrazine monohydrate (0.29 mL), and the mixture was heated at reflux for 2 hours. The reaction mixture was cooled to room temperature, and diluted with ethyl acetate. The insoluble material was removed by filtration, and the filtrate was concentrated under reduced pressure, and the residue was purified by column chromatography on silica gel (eluent: n-hexane−n-hexane/ethyl acetate=2/3) to give the title compound (0.32 g).

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