反应详情

温度

70 °C

A mixture of 4.89 g of 4-(2,3,4,5,6-pentafluorophenoxy)-4-phenylpiperidine, 50 ml of 95% ethanol and 2.1 g of nitrourea was refluxed at 70° C. until the evolution of gas had ceased. After refluxing for an additional 30 minutes, the mixture was cooled, treated with 200 ml of water and extracted with dichloromethane. The organic layer was washed with water, dried over anhydrous magnesium sulfate, filtered, and concentrated. The concentrate was purified by means of high pressure liquid chromatography (silica gel; elution with ethyl acetate) to yield 3.5 g (64.81%) of 1-aminocarbonyl-4-(2,3,4,5,6-pentafluorophenoxy)-4-phenylpiperidine, m.p. 155°-160° C.

1. temperatureAfter refluxing for an additional 30 minutes
2. temperaturethe mixture was cooled
3. extractionextracted with dichloromethane
4. washThe organic layer was washed with water
5. dry with materialdried over anhydrous magnesium sulfate
6. filtrationfiltered
7. concentrationconcentrated
8. customThe concentrate was purified by means of high pressure liquid chromatography (silica gel; elution with ethyl acetate)