One-pot synthesis of naphtho[1,2-e][1,3]oxazines in the presence of FNAOSiPAMP*/CuII as an almond shell based nanocatalyst

In the present research work, a novel catalyst based on natural material, namely, Fe3O4@nano-almondshell@OSi(CH2)(3)/NHCH(2)pyridine/Cu-II abbreviated (FNAOSiPAMP/Cu-II) was designed and prepared. The properties of the catalyst was identified by Fourier-transform infrared spectroscopy (FT-IR), Thermogravimetry ananlysis (TG), X-ray diffraction (XRD), Energy-dispersive X-ray spectroscopy (EDS), Field emission scanning electron microscopy (FESEM), Transmission electron microscopy (TEM), and Mapping. Furthermore, the evaluation of catalytic activity was done in the course of naphtho-1,3-oxazines synthesis. Solvent-free conditions, simplicity of operation, easy work-up and use of an eco-friendly catalyst are some of advantages of this protocol.

Automated summary

In this study, a novel catalyst based on natural material was designed and prepared. The properties of the catalyst were characterized using various analytical techniques, and its catalytic activity was evaluated in the synthesis of naphtho-1,3-oxazines. The protocol offers advantages such as solvent-free conditions, simplicity of operation, and the use of an eco-friendly catalyst.