反应详情

8.0 g (0.021 mol) of methyl 2-{2-[4-(1H-indol-3-yl)-piperidin-1-yl]-ethoxy}-benzoate were dissolved in 125 ml of DMF and, at room temperature, 1.12 g (0.028 mol) of 60% sodium hydride was carefully added. This mixture was stirred for half an hour. 2.9 ml (0.023 mol) of 2-bromoethyl ethyl ether were dropwise added and the stirring was continued for 4 h. The solvent was evaporated under reduced pressure and the residue was worked-up as usual. The crude mixture was purified by flash-chromatography over silica gel affording 4.12 g (54% of yield) of methyl 2-(2-{4-[1-(2-ethoxy-ethyl)-1H-indol-3-yl]-piperidin-1-yl}-ethoxy)-benzoate

1. customThe solvent was evaporated under reduced pressure
2. customThe crude mixture was purified by flash-chromatography over silica gel affording 4.12 g (54% of yield) of methyl 2-(2-{4-[1-(2-ethoxy-ethyl)-1H-indol-3-yl]-piperidin-1-yl}-ethoxy)-benzoate