反应详情

温度

30 °C

1-(4-Pyridyl)piperazine (1.63 g) was dissolved in warm acetonitrile (25 ml), the solution cooled to 30° C. and with stirring, a solution of methyl 4-(4-bromomethylphenyl)butyrate in acetonitrile (5 ml) added. After 30 minutes the resulting precipitate was removed by filtration and the filtrate concentrated in vacuo to give a yellow oil. Purification by flash chromatography on silica, eluting with 0 to 4% v/v methanol/dichloromethane gave a solid. Trituration with ether and removal of the insoluble solid gave a clear solution. Concentration of this solution gave the title compound, 0.90 g, as a white fluffy solid: m.p. 126°-127° C.; NMR (d6DMSO) δ8.14 (2H, d), 7.24 (2H, d), 7.14 (2H, d), 6.77 (2H, d), 3.59 (3H, s), 3.48 (2H, s), 3.30 (4H, t), 2.59 (2H, t), 2.47 (4H, t), 2.32 (2H, t), 1.63 (2H, m); m/e 354 (M+H)+ ; calculated for C21H27N3O2.0.25H2O: C, 70.4; H, 7.7; N, 11.7. found: C, 70.6; H, 7.6; N, 11.7%.

1. customAfter 30 minutes the resulting precipitate was removed by filtration
2. concentrationthe filtrate concentrated in vacuo
3. customto give a yellow oil
4. customPurification by flash chromatography on silica
5. washeluting with 0 to 4% v/v methanol/dichloromethane
6. customgave a solid
7. customTrituration with ether and removal of the insoluble solid
8. customgave a clear solution