An efficient approach for immobilizing the oxo-vanadium Schiff base onto polymer supports using Staudinger ligation

The present paper describes the use of Staudinger ligation as an efficient and high-yielding approach for the immobilization of oxo-vanadium Schiff base on polymeric supports via covalent attachment under mild conditions. The described strategy is simple in use, versatile, highly efficient with respect to better catalyst loading and proceeds under mild, metal-free conditions. The catalytic potential of the prepared polymer immobilized oxovanadium Schiff bases was tested for the oxidation of sulfides using aqueous tert-butyl hydroperoxide (TBHP) as oxidant. The polymer-supported catalysts could easily be recovered from the reaction mixture and reused for four runs without loss in activity and no metal leaching was observed during this course.