A Convenient Synthesis of Alkyl Substituted p-Benzoquinones from Phenols and H2O2 over TiAPO-5 Molecular Sieve Catalyst

Titanium substituted aluminophosphate (TiAPO-5) molecular sieves catalyze the oxidation reaction of alkyl substituted phenols with aqueous H2O2 in acidic medium to give the corresponding p-benzoquinones, in a single step, in high yield.