Sodium Iodide → 2(1H)-Quinolinone, 3,4-dihydro-6-(1-oxo-3-(4-(phenylmethyl)-1-piperidinyl)propyl)-

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Reaction Steps

2.4 Grams of 6-(1-oxo-3-chloropropyl)-3,4-dihydrocarbostyril and 1.6 g of sodium iodide were mixed in 60 ml of isopropanol and stirred at 40°-50° C. for 2 hours. Then 2.2 g of 4-benzylpiperidine and 3.0 g of DBU were added to the reaction mixture and refluxed by heating for 6 hours. The reaction mixture was poured into 100 ml of 5%-sodium hydrogen-carbonate aqueous solution and stirred at a room temperature for 1 hour. The insobuble matters formed were collected by filtration washed with water and dried, then recrystallized from ethanol to obtain 1.8 g of 6-[1-oxo-3-(4-benzyl-1-piperidyl)propyl]-3,4-dihydrocarbostyril in light yellow plate-like crystals. Melting point: 170°-171° C.

Provenance & Evidence