反应详情

35 ml of 2N sodium hydroxide aqueous solution was added to a solution of 11.8 g (23.0 mmol) of 1-[[[4-[2-(4-methyl-1-piperazinyl)-4-thiazolyl]phenyl]carbonyl]amino]cyclohexanecarboxylic acid phenylmethyl ester in 120 ml of tetrahydrofuran, and the mixture was refluxed under heating for 15 hours. Ether was added to the reaction mixture, and the aqueous layer was separated. Concentrated hydrochloric acid was added to the separated aqueous layer to neutralize it and the precipitated crystal was collected by filtration to obtain 6.60 g (67%) of the title compound.

1. temperaturethe mixture was refluxed
2. temperatureunder heating for 15 hours
3. customthe aqueous layer was separated
4. additionConcentrated hydrochloric acid was added to the separated aqueous layer
5. filtrationthe precipitated crystal was collected by filtration