Hydrochloric Acid → 2(1H)-Quinolinone, 3,4-dihydro-6-(4-(4-(2-chlorophenyl)-1-piperazinyl)butyl)-

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Reaction Steps

0.37 Gram of 6-{4-[4-(2-chlorophenyl)-1-piperazinyl]-1-butenyl}-3,4-dihydrocarbostyril and 0.1 g of 10%-palladium carbon were suspended in 40 ml of water, then 0.2 ml of concentrated hydrochloric acid was added to the suspension and the mixture was catalytically hydrogenated under 5 atmospheric pressure of hydrogen gas at an ordinary temperature. The catalyst was removed by filtration and to the filtrate were added 10N-NaOH and ether and stirred at a room temperature for 30 minutes. The crystals thus precipitated were collected by filtration and recrystallized from isopropanol to obtain 6-{4-[4-(2-chlorophenyl)-1-piperazinyl]butyl}-3,4-dihydrocarbostyril in colorless prism-like crystals.

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