Liquid phase oxidation of amines to azoxy compounds over ETS-10 molecular sieves
Abstract
A convenient method for the oxidation of aryl amines to azoxybenzenes with H2O2 or tertiary butyl hydroperoxide over the titanosilicate ETS-10 is reported. Over ETS-10, aniline is transformed into azoxybenzene in greater than 97% yield with H2O2 as the oxidant. Substituted anilines are also transformed in good yields. Yield and H2O2 efficiency depend largely on experimental parameters such as catalyst concentration, H2O2: substrate mole ratio and the nature of the solvent.