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Search Results: 1 - 10 of 403825 matches for " Abdullah M. Asiri "
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Synthesis of Some New Fluorine Substituted Thiobarbituricacid Derivatives as Anti HIV1 and Cyclin-Dependent Kinase 2 (CDK2) for Celltumer Division-Part II  [PDF]
Abdulrahman S. Al-Harbi, Reda M. Abdel-Rahman, Abdullah M. Asiri
International Journal of Organic Chemistry (IJOC) , 2014, DOI: 10.4236/ijoc.2014.42016
Abstract: In search for new potential inhibitors some new fluorine substituted thiobarbituric acid derivatives (2-4, 7, 8) and their fused/isolated heterobicyclic nitrogen systems (5, 6, 9, 10, 11, 12) have been synthesized from heterocyclization of fluorinated 1,3-diketoamine (1) with CS2 followed by ring closure reactions with primary nitrogen reagents. Structures of the targets have been established from elemental analysis and spectral data. Some synthesized systems have been evaluated as anti-HIV-1 and of cyclin-dependent kinase 2 (CDK2) for cell tumor division.
Urea-Based Combustion Process for the Synthesis of Nanocrystalline Ni-La-Fe-O Catalysts
Bahaa Abu-Zied,Abdullah M. Asiri
Journal of Nanomaterials , 2012, DOI: 10.1155/2012/428643
Abstract: Nanocrystalline Ni-La-Fe-O catalysts having the general formula NiLaxFe2?xO4 ( ) were synthesized by the combustion route employing urea as a combustion fuel. The calcination process was affected at 500°C. The structural properties of the obtained catalysts were systematically investigated by X-ray powder diffraction (XRD), scanning electronic microscopy (SEM), energy-dispersive X-ray spectra (EDX), and nitrogen adsorption at ?196°C. Crystalline NiFe2O4 and La2NiO4 phases were detected for the catalysts having and 2.00, respectively, as a result of solid-solid interaction between mixtures precursors. The activity of the obtained catalysts was checked for hydrogen peroxide decomposition at 35–55°C. A synergic effect was observed for the catalysts having -value of 1.00 and 1.50. Such effect was attributed to the increase in the number of the active constituents involved in the catalytic decomposition of H2O2. 1. Introduction Nickel ferrite, NiFe2O4, is one of the most important ferromagnetic materials which is known to exhibit low conductivity and thus lower eddy current losses, high electrochemical, thermal and chemical stability, abundance in nature, and so forth [1, 2]. NiFe2O4 has an inverse spinel structure in which the tetrahedral (A) sites are occupied by Fe3+ ions and the octahedral (B) sites are occupied by Ni2+ and Fe3+ ions in the spinel formula AB2O4 [3]. It has been widely used for various applications such as ferrofluids, catalysts, microwave devices, magnetic materials, gas sensors, high-density information storage, and as adsorbent to treat wastewater [4–6]. Lanthanum-nickelate-(La2NiO4-) based materials have attracted much attention in the past few years, as highly efficient electrochemical systems, including solid oxide fuel cells and ceramic membranes for oxygen separation and partial oxidation of hydrocarbons [7]. The La2NiO4 structure consists of alternating LaNiO3 perovskite layers and LaO rock-salt layers with excess oxygen atoms occupying the interstitial sites between the LaO layers [7]. La2NiO4 exists over a broad range of oxygen nonstoichiometry and its structural, electrical, and magnetic properties are very sensitive to the amount of oxygen present [8]. The conventional ceramic method which involves the solid state reaction between the metal oxides, requiring a working temperature above 1000°C for several days, was commonly used for the preparation of NiFe2O4 [9]. Employing such high operating temperature lead to the formation of inhomogeneity, poor stoichiometry, and higher crystallite size NiFe2O4 spinel [10]. In agreement,
Anthracen-9-ylmethylene-(3,4-dimethylisoxazol-5-yl)amine
Abdullah M. Asiri,Salman A. Khan
Molbank , 2011, DOI: 10.3390/M736
Abstract: The title compound, anthracen-9-ylmethylene-(3,4-dimethylisoxazol-5-yl)amine ( 3), was synthesized in high yield by reaction of anthracene-9-carbaldehyde and 5-amino-3,4-dimethyl-isoxazole in ethanol. The structure of this new compound was confirmed by elemental analysis, IR, 1H NMR, 13C NMR and GC-MS spectral analysis.
1-(2,5-Dimethyl-3-thienyl)-3-(2,4,5-trimethoxyphenyl)prop-2-en-1-one
Abdullah M. Asiri,Salman A. Khan
Molbank , 2010, DOI: 10.3390/M692
Abstract: The title compound, 1-(2,5-dimethyl-3-thienyl)-3-(2,4,5-trimethoxy-phenyl)prop-2-en-1-one ( 3) was synthesized in high yield by an aldol condensation reaction of 3-acetyl-2,5-dimethythiophene and 2,4,5-trimethoxybenzaldehyde in methanolic NaOH at room temperature. Its structure was fully characterized by elemental analysis, IR, 1H NMR, 13C NMR and EI-MS spectral data.
(2E)-3-(3,5-Dimethyl-1-phenyl-1H-pyrazol-4-yl)-1-(2,5-dimethyl-3-thienyl)prop-2-en-1-one
Abdullah M. Asiri,Salman A. Khan
Molbank , 2010, DOI: 10.3390/M679
Abstract: The title compound, (2 E)-3-(3,5-dimethyl-1-phenyl-1 H-pyrazol-4-yl)-1-(2,5-dimethyl-3-thienyl)prop-2-en-1-one (3) was synthesized in high yield by aldol condensation of 3-acetyl-2,5-dimethylthiophene and 3,5-dimethyl-1-phenylpyrazole-4-carboxaldehyde in ethanolic NaOH at room temperature. Its structure was fully characterized by elemental analysis, IR, 1H NMR, 13C NMR and EI-MS spectral analysis.
2E,2'E-3,3'-(1,4-Phenylene)bis(1-(2,5-dimethylfuran-3-yl)prop-2-en-1-one
Abdullah M. Asiri,Salman A. Khan
Molbank , 2010, DOI: 10.3390/M694
Abstract: A bis-chalcone has been synthesized by reaction of 3-acetyl-2,5-dimethylfuran and terephthalaldehyde in ethanolic NaOH at room temperature: (2E,2'E)-3,3'-(1,4-phenylene)bis(1-(2,5-dimethylfuran-3-yl)prop-2-en-1-one) ( 3) was obtained in high yield. The structure of this compound was established by elemental analysis, IR, 1H NMR, 13C NMR and EI-MS spectral analysis.
(2E)-3-(4-Dimethylaminophenyl)-1-(2,5-dimethylfuran-3-yl)-prop-2-en-1-one
Abdullah M. Asiri,Salman A. Khan
Molbank , 2011, DOI: 10.3390/M727
Abstract: The title compound, (2 E)-3-(4-dimethylaminophenyl)-1-(2,5-dimethylfuran-3-yl)-prop-2-en-1-one ( 3) was synthesized in high yield by reaction of 3-acetyl-2,5-dimethylfuran and 4-dimethyl-aminobenzaldehyde in the presence of 30% NaOH solution. The compound was fully characterized from its IR, 1H NMR, 13C NMR, GC-MS data and elemental analysis.
4-[(Anthracen-9-ylmethylene)amino]-1,5-dimethyl-2-phenyl-1,2-dihydropyrazol-3-one
Abdullah M. Asiri,Salman A. Khan
Molbank , 2011, DOI: 10.3390/M725
Abstract: The title compound, 4-[(anthracen-9-ylmethylene)amino]-1,5-dimethyl-2-phenyl-1,2-dihydropyrazol-3-one ( 3), was synthesized in high yield by reaction of anthracene-9-carbaldehyde and 4-aminoantipyrine in ethanol. The structure of this new compound was confirmed by elemental analysis, IR, 1H NMR, 13C NMR and GC-MS spectral data.
2-[(3,5-Dimethyl-1-phenyl-1H-pyrazol-4-yl)methylene]indane-1,3-dione
Abdullah M. Asiri,Salman A. Khan
Molbank , 2011, DOI: 10.3390/M720
Abstract: The title compound 2-[(3,5-dimethyl-1-phenyl-1H-pyrazol-4-yl)methylene]-indane-1,3-dione (3) was synthesized in high yield by reaction of 3,5-dimethyl-1-phenyl-pyrazole-4-carbaldehyde and indane-1,3-dione in ethanol in the presence of pyridine. The structure of this new compound was confirmed by elemental analysis, IR, 1H NMR, 13C NMR and GC-MS spectral analysis.
2,6-Bis(9-ethyl-9H-carbazolylmethylene)cyclohexanone
Abdullah M. Asiri,Salman A. Khan
Molbank , 2009, DOI: 10.3390/m635
Abstract: The title compound, 2,6-bis(ethyl-9-ethyl-9H-carbazolylmethylene)cyclohexanone has been synthesized by condensation of 9-ethylcarbazole-3-aldehyde and cyclohexanone in ethanol in the presence of pyridine. The structure of this new compound was confirmed by elemental analysis, IR, 1H NMR, 13C NMR and EI-MS spectral analysis.
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