-CHO f--CO-CHO 5-Formyl-8-quinolinol (IV) behaves as a phenolaldehyde. It is readily soluble in dilute sodium carbonate and concentrated sodium bisulfite and resists oxidation by dilute nitric acid, alkaline silver, halogen or chromic oxide solution. With one mole of bromine, IV gave the bromoaldehyde; with two moles 5, 7-dibromo-S-quinolinol was obtained, indicating that the second mole was consumed in substituting the aldehyde with ...
