Hydrochloric Acid → HCID 20349347, compound

Participants

Reaction Steps

3-Carbethoxy-4-oxo-pyrazolo[5,4-h]quinoline (0.05 mole) is added to a 10% sodium hydroxide solution (200 ml). The reaction mixture is refluxed for 3 hours, which time is required for complete dissolution to occur. The cold solution is made acidic with a dilute hydrochloric acid solution. The resulting 3-carboxy-4-oxo-pyrazolo[5,4-h]quinoline precipitates out. It is suction filtered, washed with water and dried in vacuo.

Provenance & Evidence