FeO@Glycerol-Cu As a Novel Heterogeneous Magnetic Nanocatalyst for the Green Synthesis of 2-amino-4H-chromenes

In the present study, the FeO@Glycerol-Cu complex supported magnetically as a nanoparticle was prepared by grafting. Firstly, FeO NPs were synthesized by FeCl.6HO and FeCl.4HO according to the reported method, and subsequently, the prepared MNP with 3-chloropropyltrimethoxysilane. After that, the support-glycerol was functionalized on the surface of MNP-(CH)Cl for graft and stabilization of copper metal. Our purpose is to use the FeO@Glycerol-Cu as a green, recoverable, novel, and affordable nanocatalyst in the effective synthesis of 2-amino-4H-chromenes. FT-IR, XRD, TGA, BET, VSM, TEM, and SEM-EDX techniques were examined to characterize this nanocatalyst. This result demonstrates that copper and organic compounds have appropriately reacted, with the support of MNP-(CH)Cl, and the crystalline structure have preserved in the MNP-(CH)Cl/Glycerol-Cu nanocatalyst confirmed the formation of the base Cu complex grafted on the surface of the nanoparticles. Finally, as can be seen, the nanoparticle size is 5-15 nm. This heterogeneous nanocatalyst illustrated excellent recyclable behavior, and can be used several times without notable reduction of its activity.