反应详情

To a mixture of 8-Bromo-2-chloro-5,6-dihydro-dibenzo[b,f]azocine (0.8 g, 2.5 mmole) in toluene (10 mL) was added acetic anhydride (1.2 mL, 12.5 mmole) and N,N-dimethylaminopyridine (1.51 g, 12.5 mmole). The reaction mixture was refluxed for 2 hours, concentrated and purified by flash chromatography over silica gel eluting with 30% ethyl acetate/hexane to give 1-(8-Bromo-2-chloro-6H-dibenzo[b,f]azocin-5-yl)-ethanone (0.65 g, 72%). 1HNMR (CDCl3) δ7.32 (d, 1H, J=1.76 Hz), 7.23 (dd, 1H, J=7.70, 1.76 Hz), 7.19 (m, 2H), 7.06 (d, 1H, J=8.80 Hz), 6.91 (d, 1H, J=8.36 Hz), 6.68 (d, 1H, J=13.16 Hz), 6.47 (d, 1H, J=12.76 Hz), 5.42 (d, 1H, J=14.96 Hz), 4.08 (d, 1H, J=15.36 Hz), 1.68 (s, 3H). HPLC Rt=4.05 min. m/z=362 (M+H+).

1. temperatureThe reaction mixture was refluxed for 2 hours
2. concentrationconcentrated
3. custompurified by flash chromatography over silica gel eluting with 30% ethyl acetate/hexane