Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>-(Imine-Thiazole)-Cu(OAc)<sub>2</sub> nanocomposite catalyzed one-pot three-component synthesis of 2-Substituted benzothiazoles using S<sub>8</sub> as sulfur source
Indrajit Patra, Mustafa M. Kadhim, Hamzah H. Kzar, Yasser Fakri Mustafa, Huda Ahmed Jameel
Abstract
Cu (OAc)2 was immobilized on the surface of magnetic nanoparticles modified by Imine-Thiazole acting as a ligand. This immobilization is done to fabricate a new and green magnetically recoverable copper catalyst [Fe3O4@SiO2-(Imine-Thiazole)-Cu (OAc)2]. Techniques such as ICP-OES, TEM, FT-IR, EDX, SEM, TGA, VSM, and XRD were used to characterize the structure of Fe3O4@SiO2-(Imine-Thiazole)-Cu (OAc)2 nanocomposite. To Synthesize 2-substituted benzothiazoles, the nanocomposite of Fe3O4@SiO2-(Imine-Thiazole)-Cu (OAc)2 was used as a catalyst via a one-pot three-component reaction of 2-iodoanilines, benzyl chlorides and S8. Recycling experiments revealed that a simple magnetic separation could be used to recover the copper nanocatalyst, and this nanocatalyst can be recycled eight times without any deterioration in catalytic activity.