Potassium Carbonate → HCID 14747672, compound

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Reaction Steps

To 50 ml of dimethylformamide are added 1.73 g of 6-hydroxycarbostyril, 1.8 g of K2CO3 and 0.5 g of KI. To this mixture being stirred at 60°-70° C. is dropwise added 4.2 g of N-[2-(1-pyrrolidinyl)ethyl]-N-(5-chloropentanoyl)-cyclohexylmethylamine. Then, the mixture is stirred for 4 hours at the same temperature. The solvent is removed by evaporation. The residue is dissolved in 200 ml of chloroform and the solution is washed with diluted hydrochloric acid, a 1% aqueous sodium hydroxide solution and water in this order, and dried with anhydrous magnesium sulfate. The desiccant is removed by filtration and the filtrate is concentrated. The residue is purified by means of a silica gel column chromatography (eluent; chloroform:methanol=20:1) and recrystallized from diethyl ether to obtain 0.5 g of 6-[4-{N-[2-(1-pyrrolidinyl)ethyl]-N-cyclohexylmethylaminocarbonyl}-butoxy]carbostyril.

Provenance & Evidence