Potassium Hydroxide → HCID 13324120, compound

Participants

Reaction Steps

37.9 Grams of 8-hydroxy-5-[1-oxo-3-(4-phenylpiperazinyl)propyl]-3,4-dihydrocarbostyril and 5.9 g of potassium hydroxide were dissolved in 400 ml of water and the solution was concentrated under a reduced pressure to obtain a residue. The residue was dissolved in 400 ml of dimethylformamide and then 12.0 g of methane-sulfonyl chloride was added dropwise to the solution under cooling condition. One hour after the addition either was added to the reaction mixture to obtain crystals. The crystals were collected by filtration and washed with acetone, then recrystallized from isopropanol to obtain 35.9 g of 8-methanesulfonyl-5-[1-oxo-3-(4-phenyl-1-piperazinyl)propyl]-3,4-dihydrocarbostyril in light brown needle-like crystal. Melting point: 165°-167° C.

Provenance & Evidence