Hydrochloric Acid → HCID 14747684, compound

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Reaction Steps

In 30 ml of methanol is dissolved 12.10 g of 6-{4-[N-(4-methoxymethoxy-1-piperidinyl)ethyl-N-cyclooctylmethylaminocarbonyl]butoxy}carbostyril. Thereto is added 240 ml of 5% hydrochloric acid. The mixture is stirred for 8 hours at room temperature. To the mixture is added with a 10% aqueous potassium hydroxide solution under ice cooling to make the mixture alkaline. The resulting mixture is extracted with methylene chloride. The extract is washed with water and dried with anhydrous magnesium sulfate. The solvent is removed by evaporation. The residue is purified by means of a silica gel column chromatography (eluant; chloroform:methanol=8:1) and recrystallized from ethanol to obtain 6.50 g of 6-{4-[N-(4-hydroxy-1-piperidinyl)ethyl-N-cyclooctylmethylaminocarbonyl]butoxy}carbostyril.

Provenance & Evidence