反应详情

To a stirred solution of 4.0 g of 4-(4-nitrophenoxy)-4-phenylpiperidine in 50 ml of 95% ethanol was added 1.68 g of nitrourea in 50 ml of 95% ethanol. The reaction mixture was refluxed for two hours and then poured into 200 ml of water. The aqueous suspension was extracted with dichloromethane. The organic layer was washed with water, dried over anhydrous magnesium sulfate, filtered and concentrated. The resulting solid was purified by high pressure liquid chromatography (silica gel; elution with 5% methanol/dichloromethane) to yield 4.04 g (91.20%) of 1-aminocarbonyl-4-(4-nitrophenoxy)-4-phenylpiperidine, m.p. 203°-206° C.

1. temperatureThe reaction mixture was refluxed for two hours
2. extractionThe aqueous suspension was extracted with dichloromethane
3. washThe organic layer was washed with water
4. dry with materialdried over anhydrous magnesium sulfate
5. filtrationfiltered
6. concentrationconcentrated
7. customThe resulting solid was purified by high pressure liquid chromatography (silica gel; elution with 5% methanol/dichloromethane)