Methyl iodide → 8-Chloro-1-methyl-3,4-dihydro-1H-benzo[b]azepine-2,5-dione

Participants

Reaction Steps

8-Chloro-3,4-dihydro-1H-benzo[b]azepine-2,5-dione (iv-j) (0.2 g, 1 mmol) was dissolved in a mixture of THF (10 mL) and DMF (2 mL). Cesium carbonate (0.98 g, 3 mmol) and methyl iodide (0.069 mL, 1.1 mmol) were added and the reaction mixture was stirred at room temperature for 3 h. The mixture was concentrated under reduced pressure and dichloromethane (10 mL) was added. The inorganic precipitate was filtered and the filtrate was concentrated under reduced pressure to give a viscous residue. This residue was purified utilizing column chromatography, eluting with 50% ethyl acetate/hexane to afford the title compound as a white solid (0.1 g, 45%): MS m/z═224 (M+H).

Provenance & Evidence