Fe3O4@APTES@isatin-SO3H as heterogeneous and efficient catalyst for the synthesis of quinoxaline derivatives

Abstract

In this work, an efficient and new Fe3O4@APTES@isatin-SO3Hwas synthesized through immobilization of isatin sulfonic acid on silica modified Fe3O4 nanoparticles. The synthesizedFe3O4@APTES@isatin-SO3Hmagnetic nanoparticles (MNPs) were characterized using the energy dispersive X-ray spectroscopy (EDX), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), vibrating sample magnetometer (VSM), X-ray diffraction (XRD), and thermogravimetric(TGA) analysis. The Fe3O4@APTES@isatin-SO3HMNPs performed efficient catalytic activity as a magnetically recyclable heterogeneous catalyst for one-pot, condensation reaction of 1,2-dicarbonyl compounds and o-phenylen diamines in ethanol at room temperature to afford quinoxaline derivatives.

Magnetic nanoparticle-supported eosin Y salt [SB-DABCO@eosin] as an efficient heterogeneous photocatalyst for the multi-component synthesis of chromeno[4,3-b]chromene in the presence of visible light

“…Morphologies of the synthesized nanomaterials were analyzed using a Quantum 2000 eld emission scanning electron microscope (FESEM). 1 H-and 13 C-NMR spectra were recorded on a 300 MHz Bruker AVANCE III spectrometer using TMS as the internal reference. A Photonix UV-visible array spectrophotometer was used to record UVvisible spectra.…”

“…The product was conrmed by 1 H and 13 C NMR spectra. 13 C NMR (75 MHz, DMSO-d 6 ) d (ppm): 195.9, 163.9, 160.8, 159.9, 153.9, 153.0, 135.9, 133.2, 130.2, 125.2, 123.4, 121.2, 116.9, 116.5, 114.0, 113.5, 112.0, 106.9, 55.6, 37.2, 32.9, 27.0, 20.5.…”

“…Magnetic nanoparticles are important catalysts for the synthesis of various compounds because they have a considerable advantages such as non toxicity, enhanced water solubility, elevated stability and reduced particle aggregation and reusability compared to other catalysts. [10][11][12][13][14][15][16] Among different types of nanoparticles, iron oxide nanoparticles have been widely explored by researchers because they do not retain any magnetization when the magnetic eld is removed. In fact, iron oxide nanoparticles (Fe 3 O 4 ) have been widely applied due to their easy functionalization with polymers and other materials.…”

Fe3O4/GO nanocomposite modified glassy carbon electrode as a novel voltammetric sensor for determination of bisphenol A

“…Among those hybrid materials, the ones with the magnetic nanoparticles (e.g., Fe3O4, Fe2O3) are an important class of materials due to their numerous applications in various technological fields [70]. Magnetite (Fe3O4) nanoparticles (NPs) have attracted worldwide research attention not only because of their unique size-and morphologydependent physical and chemical properties but also for their potential applications in many fields, including magnetic storage, biosensors, communication materials, magnetic resonance imaging and as materials for microwave absorbing and shielding research [71][72][73].…”

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“…In addition, the quinoxaline derivatives are utilized in industry, in dyes, fluorescent dyes, materials having electroluminescence properties and in the synthesis of organic semiconductors [6]. The methods reported in the literature for the synthesis of quinoxaline utilize various catalytic systems such as ultrasonic [7], CuSO4.5H2O (II) [8], heteropoly acids [9], Si/MCM-41 [10], phosphosulfonic acid [11], boron sulfonic acid [12], citric acid [13], bismuth (III) triflate [14], ammonium chloride [15], and Zn(L-proline) [16]. In recent years, ionic liquid has received considerable interest due to their unique physical and chemical properties such as: designable chemical properties, high electrical conductivity, dual solvent-catalytic role [17], non-volatile, heat resistance, non-flammable and the ability to dissolve many organic and mineral and organicmetal compounds [18], energy storage and conversion of materials and devices [19].…”