In this study, a green and efficient catalyst was prepared by immobilization of copper complex of 1-(benzo[d]thiazol-2-yl)urea on the surface of mesoporous SBA-15 (SBA-15@(CH2)3-urea-benzothiazole-Cu). At frist, 1-(benzo[d]thiazol-2-yl)urea as a new ligand was immobilized on the surface of modified SBA-15, and further it was used as an effective host for the immobilizing Cu(II) ions. The synthesized catalyst was characterized by XRD, SEM, WDX, BET, EDS, and FT-IR, and then successfully used to synthesize 5-substituted tetrazoles. In synthesizing 5-substituted 1H-tetrazoles, the catalyst shows high yields in short reaction times at 120 °C (Scheme 1). Also, the prepared catalyst showed high reusability, which it was reused 5 times without significantly decreasing in its catalytic activity.
