Hydrochloric Acid → HCID 13369832, compound

Participants

Reaction Steps

3.76 Grams of 6-(4-acetylmethyl-1-piperazinylcarbonyl)-3,4-dihydrocarbostyril monohydrochloride was dissolved in 50 ml of methanol, under ice-cooled condition, 0.44 g of sodium borohydride (NaBH4) was added slowly and then stirred at a room temperature for 1 hour. After the reaction was completed, a concentrated hydrochloric acid was added to adjust the pH of the reaction mixture to about pH 1, then most portion of the solvent was removed by distillation under a reduced pressure and the residue was extracted with 1 N-NaOH-chloroform. The organic layer was washed with water and dried with anhydrous sodium sulfate, then the solvent was removed by distillation. The residue obtained was treated by means of a column chromatography and recrystallized from ethanol to obtain 2.26 g of 6-[4-(2-hydroxypropyl)-1-piperazinylcarbonyl]-3,4-dihydrocarbostyril. Colorless flake-like crystals. Melting point: 156°-157.5° C.

Provenance & Evidence