Synthesis of Novel Azo-Linked 5-Amino-Pyrazole-4-Carbonitrile Derivatives Using Tannic Acid–Functionalized Silica-Coated Fe3O4 Nanoparticles as a Novel, Green, and Magnetically Separable Catalyst

Tannic acid–linked silica-coated Fe3O4 nanoparticles (Fe3O4@SiO2@Tannic acid) were prepared and characterized by transmission electron microscope (TEM), field emission scanning electron microscope (FE-SEM), X-ray powder diffraction (XRD), X-ray spectroscopy (EDX), vibrating sample magnetometry (VSM)...

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Autores principales:	Farhad Sedighi Pashaki, Mohammad Nikpassand
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	5-amino-pyrazole-4-carbonitriles Fe3O4@SiO2@Tannic acid malononitrile three-component reaction tannic acid Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/6b7eef81aa374794a855b81a1d42fd28
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spelling	oai:doaj.org-article:6b7eef81aa374794a855b81a1d42fd282021-11-12T06:35:32ZSynthesis of Novel Azo-Linked 5-Amino-Pyrazole-4-Carbonitrile Derivatives Using Tannic Acid–Functionalized Silica-Coated Fe3O4 Nanoparticles as a Novel, Green, and Magnetically Separable Catalyst2296-264610.3389/fchem.2021.724745https://doaj.org/article/6b7eef81aa374794a855b81a1d42fd282021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fchem.2021.724745/fullhttps://doaj.org/toc/2296-2646Tannic acid–linked silica-coated Fe3O4 nanoparticles (Fe3O4@SiO2@Tannic acid) were prepared and characterized by transmission electron microscope (TEM), field emission scanning electron microscope (FE-SEM), X-ray powder diffraction (XRD), X-ray spectroscopy (EDX), vibrating sample magnetometry (VSM), and Fourier transform infrared (FT-IR) spectroscopy. Fe3O4@SiO2@Tannic acid supplies an environmentally friendly procedure for the synthesis of some novel 5-amino-pyrazole-4-carbonitriles through the three-component mechanochemical reactions of synthetized azo-linked aldehydes, malononitrile, and phenylhydrazine or p-tolylhydrazine. These compounds were produced in high yields and at short reaction times. The catalyst could be easily recovered and reused for six cycles with almost consistent activity. The structures of the synthesized 5-amino-pyrazole-4-carbonitrile compounds were confirmed by 1H NMR, 13C NMR, and FTIR spectra, and elemental analyses.Farhad Sedighi PashakiMohammad NikpassandFrontiers Media S.A.article5-amino-pyrazole-4-carbonitrilesFe3O4@SiO2@Tannic acidmalononitrilethree-component reactiontannic acidChemistryQD1-999ENFrontiers in Chemistry, Vol 9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	5-amino-pyrazole-4-carbonitriles Fe3O4@SiO2@Tannic acid malononitrile three-component reaction tannic acid Chemistry QD1-999
spellingShingle	5-amino-pyrazole-4-carbonitriles Fe3O4@SiO2@Tannic acid malononitrile three-component reaction tannic acid Chemistry QD1-999 Farhad Sedighi Pashaki Mohammad Nikpassand Synthesis of Novel Azo-Linked 5-Amino-Pyrazole-4-Carbonitrile Derivatives Using Tannic Acid–Functionalized Silica-Coated Fe3O4 Nanoparticles as a Novel, Green, and Magnetically Separable Catalyst
description	Tannic acid–linked silica-coated Fe3O4 nanoparticles (Fe3O4@SiO2@Tannic acid) were prepared and characterized by transmission electron microscope (TEM), field emission scanning electron microscope (FE-SEM), X-ray powder diffraction (XRD), X-ray spectroscopy (EDX), vibrating sample magnetometry (VSM), and Fourier transform infrared (FT-IR) spectroscopy. Fe3O4@SiO2@Tannic acid supplies an environmentally friendly procedure for the synthesis of some novel 5-amino-pyrazole-4-carbonitriles through the three-component mechanochemical reactions of synthetized azo-linked aldehydes, malononitrile, and phenylhydrazine or p-tolylhydrazine. These compounds were produced in high yields and at short reaction times. The catalyst could be easily recovered and reused for six cycles with almost consistent activity. The structures of the synthesized 5-amino-pyrazole-4-carbonitrile compounds were confirmed by 1H NMR, 13C NMR, and FTIR spectra, and elemental analyses.
format	article
author	Farhad Sedighi Pashaki Mohammad Nikpassand
author_facet	Farhad Sedighi Pashaki Mohammad Nikpassand
author_sort	Farhad Sedighi Pashaki
title	Synthesis of Novel Azo-Linked 5-Amino-Pyrazole-4-Carbonitrile Derivatives Using Tannic Acid–Functionalized Silica-Coated Fe3O4 Nanoparticles as a Novel, Green, and Magnetically Separable Catalyst
title_short	Synthesis of Novel Azo-Linked 5-Amino-Pyrazole-4-Carbonitrile Derivatives Using Tannic Acid–Functionalized Silica-Coated Fe3O4 Nanoparticles as a Novel, Green, and Magnetically Separable Catalyst
title_full	Synthesis of Novel Azo-Linked 5-Amino-Pyrazole-4-Carbonitrile Derivatives Using Tannic Acid–Functionalized Silica-Coated Fe3O4 Nanoparticles as a Novel, Green, and Magnetically Separable Catalyst
title_fullStr	Synthesis of Novel Azo-Linked 5-Amino-Pyrazole-4-Carbonitrile Derivatives Using Tannic Acid–Functionalized Silica-Coated Fe3O4 Nanoparticles as a Novel, Green, and Magnetically Separable Catalyst
title_full_unstemmed	Synthesis of Novel Azo-Linked 5-Amino-Pyrazole-4-Carbonitrile Derivatives Using Tannic Acid–Functionalized Silica-Coated Fe3O4 Nanoparticles as a Novel, Green, and Magnetically Separable Catalyst
title_sort	synthesis of novel azo-linked 5-amino-pyrazole-4-carbonitrile derivatives using tannic acid–functionalized silica-coated fe3o4 nanoparticles as a novel, green, and magnetically separable catalyst
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/6b7eef81aa374794a855b81a1d42fd28
work_keys_str_mv	AT farhadsedighipashaki synthesisofnovelazolinked5aminopyrazole4carbonitrilederivativesusingtannicacidfunctionalizedsilicacoatedfe3o4nanoparticlesasanovelgreenandmagneticallyseparablecatalyst AT mohammadnikpassand synthesisofnovelazolinked5aminopyrazole4carbonitrilederivativesusingtannicacidfunctionalizedsilicacoatedfe3o4nanoparticlesasanovelgreenandmagneticallyseparablecatalyst
_version_	1718431113647489024

Synthesis of Novel Azo-Linked 5-Amino-Pyrazole-4-Carbonitrile Derivatives Using Tannic Acid–Functionalized Silica-Coated Fe3O4 Nanoparticles as a Novel, Green, and Magnetically Separable Catalyst

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