Titanium Dioxide As An Efficient Heterogeneous Catalyst For Quick C-B Bond Cleavage Of Aryl/Hetero Arylboronic Acid On Water At Room Temperature

A simple and convenient protocol for the conversion of aryl/heteroarylboronic acids to corresponding phenols via oxidative hydroxylation has been developed, using titanium dioxide (TiO2) as heterogeneous catalyst and aqueous hydrogen peroxide as oxidant. The reusability of the said catalyst is assessed and it could be recycled up to 5th consecutive cycles without significant loss of catalytic activity. The reaction pathway is greener with ligand and base free reaction condition, short reaction time, reusable heterogeneous catalytic system and room temperature aqueous reaction medium.