Synthesis of Some Nano Heterocyclic and relevant Compounds as antioxidant materials

Abstract

A series of nine 8-azacoumarin derivatives bearing aryl moieties at C-5 and C-7 was designed and synthesized by a concise and facile approaches using grinding and ultrasound approaches. The efficient multi-component protocols proceeded smoothly and in absence of solvents to furnish the target products in moderate to good yields. All the synthesized molecules were characterized via 1HNMR, 13CNMR, IR, Mass spectra, and elemental analyses.These heterocyclic compounds are chemically stable and possess multi actions for base oil improvement. The characterization of the prepared NPs was done usingultraviolet-visible spectroscopy, which showed a 593 nm copper band. The Field EmissionScanning Electron Microscope (FESEM) images were also observed and found to be inagreement with the UV-Vis result, confirming the