反应详情

温度

50 °C

The mixture of imidazole (0.7 g, 0.01M) and NaH (50% by weight in mineral oil, 0.9 g, 0.018M) in dimethylformamide (60 ml) was heated at 50° C. for 1/2 hr. and 4-(3-bromopropyl)-1-piperidinecarboxaldehyde (2.93 g, 0.0125M) in dimethylformamide (20 ml) was added. The reaction was heated at 50° C. for 4 hrs. After the reaction, the solvent was removed in vacuo, water was added and the product was extracted with CH2Cl2 (3×50 ml). The combined extracts, dried over Na2SO4, were stripped to dryness and purified on silica gel column eluted with 10% by volume methanol-90% by volume methylenechloride to give 4[3-(1H-imidazol-1-yl)propyl]-1-piperidinecarboxaldehyde as an oil (2.12 g, 96%).

1. temperatureThe reaction was heated at 50° C. for 4 hrs
2. customAfter the reaction
3. customthe solvent was removed in vacuo, water
4. additionwas added
5. extractionthe product was extracted with CH2Cl2 (3×50 ml)
6. dry with materialThe combined extracts, dried over Na2SO4
7. custompurified on silica gel column
8. washeluted with 10% by volume methanol-90% by volume methylenechloride