چكيده به لاتين
In this work, a novel heterogeneous catalyst based on graphitic carbon nitride nanosheets (CN) has been reported. The CN surface was functionalized by 1,3-dibromopropane as a linker (CN-Pr-Br) and subsequently modified with metformin for the first time (CN-Pr-Met). Furthermore, the copper (II) was coordinated on modified CN (CN-Pr-Met-Cu(II)) and used in the tandem oxidative amidation of benzylic alcohols in the presence of amine hydrochloride salts. The newly synthesized structure was evaluated by using various techniques including FT-IR, EDX, -SEM, TGA, XRD, and ICP-OES. The reaction was carried out within 3 hours in the presence of TBHP as oxidant and CaCO3 as a base at 80 °C of acetonitrile solvent. After optimizing the reaction conditions from different points of view, a variety of amide derivatives with an efficiency of 75-95% were synthesized. In addition, the presence of 7.94% copper(II) in the catalyst surface has led to a significant improvement in the reaction time. Also, this catalyst can be reused for 7 consecutive runs without a significant reduction in reaction efficiency.
