Diethyl Ether → 1-[([4-[2-(4-Methyl-1-piperazinyl)-4-thiazolyl]phenyl]carbonyl]amino]cyclohexanecarboxylic acid

Participants

Reaction Steps

35 ml of 2N aqueous sodium hydroxide 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 heated under reflux for 15 hours. Ether was added to the reaction solution to separate the aqueous layer. 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.

Provenance & Evidence