The synthesis of aryl isothiocyanate derivatives by copper(II) catalyst located on the substrate of nano magnetic

In recent years,the hetrogenizationof homogeneous catalysts has attracted immense attention[1].Recovery and reuse of expensive catalysts after catalytic reactions are important factors for sustainable process management.The surface of themagnetic nanoparticles is usually coated with a layer of silica to prevent aggregation. Because of the importance ofmagnetic catalysts, the synthesis and characterization ofthese types of catalyst are of interest, and there have beenmany reports dealing with this area[2]. In the past decade, transition-metal-catalyzed C−Hfunctionalization has been developed as an attractive andpowerful strategy, because this method permits more-efficient synthesis of functionalized molecules by minimizingthe number of synthetic steps[3].In this paper, to prepare a heterogeneous catalyst , Fe3O4 nanoparticles coated by silica (Fe3O4@SiO2), then reflux in three stages , with (3-Aminopropyl)trimethoxysilane (APTMS), PhNCO and copper(II) acetate were functionalized nanoparticles.The new magnetic catalyst was charactrized by FTIR, XRD,TGA,VSM,EDX,SEM,We used new magnetic catalyst for synthesis of aryl isothiocyanate derivatives.