Preparation of Sulfamic Acid-Functionalized Fe3O4@Carbon as an Efficient Nanocatalyst for One-Pot Synthesis of 9,9-Dimethyl-12-phenyl- 8,9,10,12-tetrahydro-11H-benzo[a]xanthen-11-one Derivatives

In the past decade, magnetic nanoparticles have attracted the attention of many researchers fortheir excellent properties. Magnetic nanoparticles, due to their large specific surface againstoxidation and agglomeration are highly sensitive and chemically very reactive, the surface ofmagnetic nanoparticle can be modified with a layer of silica, polymer, carbon or metal hydroxides.Among these, carbon-coated magnetic nanoparticles have been considered for manyadvantages compared to polymer and silicone coatings. Carbon materials from this precursor,resorcinol-formaldehyde resin, glucose and dopamine, have a much higher chemical andthermal stability, and they are impermeable to most chemicals and fully protect internal magneticcores [1,2]. One of the nano-structures that are nowadays of great interest is nanoparticleswith core-shell structure. These nanoparticles have special applications in the biosensors,catalysts, and also in the paint industry. Providing a good surface for the stabilization of terminalfunctional groups [3] In this study, we fixed the sulfamic acid groups on the carbonmodifiedmagnetic core-shell nanoparticles and applied as efficient and very active nanocatalystfor the synthesis of biologically active of 9,9-dimethyl-12-phenyl-8,9,10,12-tetrahydro-11H-benzo[a]xanthen-11-one derivatives (Fig. 1).