Ring - chain transformations with participation of the C = N group

Research paper by R. É. Valter, V. P. Tsiekure

Indexed on: 01 Nov '75Published on: 01 Nov '75Published in: Chemistry of Heterocyclic Compounds


The ring-chain tautomeric equilibrium constants (K) of aryl-ring-substituted 3-arylamino-3-phenylphthalides in dioxane were measured by UV spectroscopy. A satisfactory linear correlation between log K/K0 and the σ+ constants of the substituents in the aryl ring was found.