fe3o4@sio2 nanoparticle-immobilized cu(ii)-benzoylthiourea complex as a magnetically reusable catalyst for the synthesis of benzo[d]imidazo[2,1-b]thiazole-1-ium hydroxide derivatives in water

In this work, an appropriate method for the synthesis of benzo[d]imidazo[2,1-b]thiazole-1-ium hydroxide derivatives has been developed using a benzoylthiourea cu(ιι) complex immobilized on silica-coated fe3o4 nanoparticles (fe3o4@sio2-btu-cu(ii)) as a highly stable, heterogeneous and magnetically recoverable nanocatalyst. the constructed superparamagnetic nanocatalyst was characterized by vsm, icp, ft-ir, tga, sem–edx, tem and xrd analyses. the nanocatalyst was easily recoverable through an external magnet and reused at least 6 times regardless of any considerable loss of its catalytic activity.