An Efficient Approach for Immobilizing the Oxo-Vanadium Schiff Base onto Polymer Supports using Staudinger Ligation

摘要

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 oxo-vanadium 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.