Abstract
Preparation of the 4‐phtalazone 1‐oxyacetic and 4‐hydroxy 2‐acetic isomeric acids and of a dicarboxylic acid, 4‐phtalazone 1‐oxyacetic 3‐acetic acid. Structural identification by potentiometric titration, ultraviolet and infrared spectrophotometrical methods. Attempt for obtaining the halogenated analogues of these isomeric acids.