RETRACTED ARTICLE: Copper complex immobilized on Fe₃O₄ nanoparticles: a novel and recoverable heterogenous catalyst for synthesis of heterocycles

2,4,6-Triaryl 1,3,5-triazine and 2-arylbenzothiazole derivatives have high biological activity potentials that are present in many natural and medicinal products. For these reasons, the synthesis of 2,4,6-triaryl 1,3,5-triazine and 2-arylbenzothiazole derivatives is of great interest among synthetic chemists. In this synthetic approach, we found that the utilization of Fe₃O₄@DH/Ph-ImH-Phen-CuCl₂ nanocomposite in the presence of KOAc in ChCl/urea as solvent is an ecofriendly and efficient catalytic system for the synthesis of triazine and 2-arylbenzothiazole derivatives. Under this catalytic system, a broad range of 2,4,6-triaryl 1,3,5-triazine and 2-arylbenzothiazole derivatives were successfully synthesized with high to excellent yields. Compared to previously reported methods, this method has advantages such as synthesis of 2,4,6-triaryl 1,3,5-triazine and 2-arylbenzothiazole products with high to excellent yields, performance of reactions in ChCl/urea as green solvent, simple separation of the Fe₃O₄@DH/Ph-ImH-Phen-CuCl₂ nanocatalyst only with an external magnet, high reusability of Fe₃O₄@DH/Ph-ImH-Phen-CuCl₂ nanocatalyst, good characterization of the structure of copper nanomagnetic catalyst, and good characterization of the 2,4,6-triaryl 1,3,5-triazine and 2-arylbenzothiazole products by 1HNMR and 13CNMR spectroscopic techniques.