反应详情

N-methylaniline (1.01 mL, 9.33 mmol) was reacted with 1,3-dibromopropane (0.947 mL, 9.33 mmol) and diisopropylethylamine (2.55 mL, 18.66 mmol) in ACN at 70° C. for 12 hours. The solvent was evaporated and the residue was purified by silica gel column chromatography to provide the intermediate 9a as a yellow oil (0.80 g, 3.52 mmol, 37% yield). HRMS (ESI, positive) m/z calcd. for C10H15NBr [M+H]+: 228.03824, found: 228.03824. 1H NMR (CDCl3, 400 MHz) δ 7.67 (t, J=8.4 Hz, 2H), 6.71 (d, J=8.0 Hz, 2H), 6.617 (t, J=7.2 Hz, 1H), 3.562 (t, J=6.8 Hz, 2H), 3.431 (t, J=7.2 Hz, 2H), 2.878 (s, 3H), 2.072 (m, 2H).

1. customThe solvent was evaporated
2. customthe residue was purified by silica gel column chromatography