反应详情

600 ml of 1N aqueous sodium hydroxide solution was added to a solution of 7.62 g (20 mmol) of 1-[[(4-phenylmethyl-1-piperazinyl)carbonyl]amino]cyclohexanecarboxylic acid ethyl ester in 300 ml of ethanol, and the mixture was heated under reflux for 2 hours. After ether was added to the reaction solution to wash it, the aqueous layer was neutralized by concentrated hydrochloric acid, and the mixture was extracted with ethyl acetate. After the obtained organic layer was washed with saturated brine, it was dried with anhydrous sodium sulfate. The solvent was distilled off under reduced pressure to obtain 2.90 g (42%) of the title compound.

1. temperaturethe mixture was heated
2. temperatureunder reflux for 2 hours
3. washto wash it
4. extractionthe mixture was extracted with ethyl acetate
5. washAfter the obtained organic layer was washed with saturated brine, it
6. dry with materialwas dried with anhydrous sodium sulfate
7. distillationThe solvent was distilled off under reduced pressure