Fe3O4@Glycerol-Cu as a novel heterogeneous magnetic nanocatalyst for the green synthesis of 2-amino-4H-chromenes

In the present study, the Fe3O4@Glycerol-Cu complex supported magnetically as a nanoparticle was prepared by grafting. Firstly, Fe3O4 NPs were synthesized by FeCl3.6H(2)O and FeCl2.4H(2)O 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-(CH2)(3)Cl for graft and stabilization of copper metal. Our purpose is to use the Fe3O4@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-(CH2)(3)Cl, and the crystalline structure have preserved in the MNP-(CH2)(3)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.

Automated summary

In this study, a magnetically supported nanoparticle catalyst, Fe3O4@Glycerol-Cu, was prepared using the grafting method. The catalyst showed excellent recyclable behavior and was successfully used in the synthesis of 2-amino-4H-chromenes. Characterization techniques confirmed the preservation of crystalline structure and activity of the catalyst.