... Titre du document / Document title. Transition-Metal-Catalyzed Oxidative Heck Reactions. Auteur(s) / Author(s). KARIMI Babak ; BEHZADNIA Hesam ; ELHAMIFAR Dawood ; FADAVIAKHAVAN Pari ; KABIRI ESFAHANI Farhad ; ZAMANI Asghar ; Résumé /... more
... Titre du document / Document title. Transition-Metal-Catalyzed Oxidative Heck Reactions. Auteur(s) / Author(s). KARIMI Babak ; BEHZADNIA Hesam ; ELHAMIFAR Dawood ; FADAVIAKHAVAN Pari ; KABIRI ESFAHANI Farhad ; ZAMANI Asghar ; Résumé / Abstract. ...
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Abstract A novel ionic liquid based bifunctional periodic mesoporous organosilica supported potassium carbonate (BPMO-IL-KCO 3 ) is prepared, characterized and its catalytic efficiency is studied in the Knoevenagel reaction. The... more
Abstract A novel ionic liquid based bifunctional periodic mesoporous organosilica supported potassium carbonate (BPMO-IL-KCO 3 ) is prepared, characterized and its catalytic efficiency is studied in the Knoevenagel reaction. The BPMO-IL-KCO 3 was prepared by chemical attachment of 1-methyl-(3-trimethoxysilylpropyl) imidazolium chloride on an ionic liquid based PMO followed by treatment with potassium carbonate under ambient temperature. This material was characterized with thermal gravimetric analysis (TGA), energy-dispersive X-ray (EDX) spectroscopy, powder X-ray diffraction (PXRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The BPMO-IL-KCO 3 was then successfully applied as efficient base catalyst in the Knoevenagel condensation of different aldehydes with ethyl cyanoacetate and gave high to excellent yields of the corresponding coupling products. The catalyst was recovered and reused several times without significant decrease in activity and selectivity. The recovered catalyst was also analyzed with TEM and nitrogen sorption experiment to investigate structural stability and durability of the material under applied conditions.
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A new type of polymerizable ionic liquid (IL) 1-(3-aminobenzyl)-3-methylimidazolium chloride (AMIC) was synthesized to obtain a novel polymer salt poly(1-(3-aminobenzyl)-3-methylimidazolium chloride) (PAMIC). The AMIC was structurally... more
A new type of polymerizable ionic liquid (IL) 1-(3-aminobenzyl)-3-methylimidazolium chloride (AMIC) was synthesized to obtain a novel polymer salt poly(1-(3-aminobenzyl)-3-methylimidazolium chloride) (PAMIC). The AMIC was structurally characterized by mass spectrometry and Fourier transform infrared spectrometry (FTIR). The structure, morphology and properties of PAMIC were investigated by FTIR, ultraviolet visible absorption spectra (UV-Vis), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), conductivity measurement and thermo-gravimetric analysis (TGA). The PAMIC was spherulitic with an average diameter of about 50 nm and showed high conductivity and excellent thermal stability.
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A novel magnetic silica/graphene oxide nanocomposite supported ionic liquid/manganese complex (Fe3O4@SiO2-NH2/GO/IL-Mn) is prepared, characterized and its catalytic application is investigated. The Fe3O4@SiO2-NH2/GO/IL-Mn catalyst was... more
A novel magnetic silica/graphene oxide nanocomposite supported ionic liquid/manganese complex (Fe3O4@SiO2-NH2/GO/IL-Mn) is prepared, characterized and its catalytic application is investigated. The Fe3O4@SiO2-NH2/GO/IL-Mn catalyst was synthesized via chemical immobilization of graphene oxide on Fe3O4@SiO2 nanoparticles followed by modification with ionic liquid/Mn complex. This nanocomposite was characterized by using SEM, TGA, FT-IR, PXRD, EDX, TEM, nitrogen adsorption–desorption, and VSM analyses. The catalytic application of Fe3O4@SiO2-NH2/GO/IL-Mn was studied in the synthesis of tetrahydrobenzo[b]pyrans (THBPs) in water solvent at RT. This nanocatalyst was successfully recovered and reused at least eight times without a significant decrease in its activity.
Research Interests: Chemistry, Organic Chemistry, Catalysis, Ionic Liquid, Medicine, and 15 moreHeterogeneous Catalysis, Porosity, Palladium, Alcohol oxidation, Particle Size, Surface Properties, Imidazoles, Organosilicon Compounds, Organometallic Compounds, Oxidation-Reduction, Alcohols, Molecular Structure, ketones, Mesoporous Material, and Pharmacology and pharmaceutical sciences
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A novel magnetic iron oxide supported phenylsulfonic acid (FeO@Ph-SOH) with core-shell structure is prepared, characterized and applied as efficient nanocatalyst for green synthesis of tetrahydrobenzo[b]pyrans. The FeO@Ph-SOH was prepared... more
A novel magnetic iron oxide supported phenylsulfonic acid (FeO@Ph-SOH) with core-shell structure is prepared, characterized and applied as efficient nanocatalyst for green synthesis of tetrahydrobenzo[b]pyrans. The FeO@Ph-SOH was prepared via modification of magnetic iron oxide cores with 1,4-bis(triethoxysilyl)benzene (BTEB) followed by sulfonation of aromatic rings. The FeO@Ph-SOH was characterized using FTIR, TGA, PXRD, SEM, TEM, VSM and EDX techniques. This was effectively applied for synthesis of tetrahydrobenzo[b]pyrans in water as green solvent at room temperature under ultrasonic conditions. The products were obtained in high to excellent yields at short times. The recoverability, reusability and durability of this nanocatalyst were studied under applied reaction conditions.
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The catalyst can be recycled and used in at least four runs with only a slight loss in activity.
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This article describes the synthesis of a novel core‐shell structured magnetic silica‐supported hexatungstate (Fe3O4@SiO2‐NH3[W6O19]) nanocatalyst through immobilization of hexatungstate on amine‐modified magnetic silica nanoparticles.... more
This article describes the synthesis of a novel core‐shell structured magnetic silica‐supported hexatungstate (Fe3O4@SiO2‐NH3[W6O19]) nanocatalyst through immobilization of hexatungstate on amine‐modified magnetic silica nanoparticles. The physicochemical properties of Fe3O4@SiO2‐NH3[W6O19] were investigated by using Fourier transform infrared (FT‐IR) spectroscopy, powder X‐ray diffraction, vibrating sample magnetometer, wide‐angle PXRD, scanning electron microscopy, transmission electron microscopy, and energy‐dispersive X‐ray spectroscopy analyses. The Fe3O4@SiO2‐NH3[W6O19] nanocatalyst was used as a powerful and heterogeneous catalyst in the synthesis of pyrazole derivatives. This novel catalyst was reused at least seven times without loss of its activity.
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Titanium was incorporated in ionic liquid based periodic mesoporous organosilica to prepare a nanostructured catalyst (Ti@PMO‐IL) with high activity. Procedure for the synthesis of Ti@PMO‐IL was followed according the simultaneous... more
Titanium was incorporated in ionic liquid based periodic mesoporous organosilica to prepare a nanostructured catalyst (Ti@PMO‐IL) with high activity. Procedure for the synthesis of Ti@PMO‐IL was followed according the simultaneous hydrolysis and condensation of alkylimidazolium ionic liquid, tetramethoxysilane (TMOS) and tetrabutylorthotitanate (TBOT) where a surfactant template was used together with a simple acid‐based catalytic aproach. N2 adsorption isotherm of the Ti@PMO‐IL was studied to measure its mean pore volume, pore size distribution and specific surface area. Diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy was applied to identify the chemical bonds present in Ti@PMO‐IL. The morphology of this nanomaterial was investigated by scanning electron microscopy (SEM). Transmission electron microscopy (TEM) image was used to study mesoporosity and structure order of the catalyst. The catalytic activity of Ti@PMO‐IL was then studied and found to be efficient and reusable to catalyze Hantzsch reaction.
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Abstract A novel ionic liquid modified graphene oxide supported Mo-complex [GO@IL/MoO2(acac)2] was successfully prepared, characterized and its catalytic application was investigated. The GO@IL/MoO2(acac)2 catalyst was prepared through... more
Abstract A novel ionic liquid modified graphene oxide supported Mo-complex [GO@IL/MoO2(acac)2] was successfully prepared, characterized and its catalytic application was investigated. The GO@IL/MoO2(acac)2 catalyst was prepared through the surface modification of graphene oxide with alkyl imidazolium chloride followed by treatment with molybdenyl acetylacetonate. The GO@IL/MoO2(acac)2 catalyst was characterized by using FT-IR, PXRD, TGA, EDX, and SEM analyses. This catalyst showed high activity in the green production of pyrazolo[b]phthalazine dione derivatives under ultrasonic conditions. The designed catalyst was effectively recovered and successfully reused at least eight times without significant loss in its efficiency.
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Preparation, characterization and catalytic application of a novel magnetic ordered mesoporous silica supported Schiff-base/Pd (Fe3O4@MCM-41-SB/Pd) are developed.
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The catalytic application of a novel manganese-containing periodic mesoporous organosilica with ionic-liquid framework (Mn@PMO-IL) in the Biginelli reaction was investigated. First, the Mn@PMO-IL nanocatalyst was prepared and... more
The catalytic application of a novel manganese-containing periodic mesoporous organosilica with ionic-liquid framework (Mn@PMO-IL) in the Biginelli reaction was investigated. First, the Mn@PMO-IL nanocatalyst was prepared and characterized by TEM, SEM, X-ray photoelectron spectroscopy, and nitrogen-sorption analysis. The catalyst was then used in the one-pot Biginelli condensation of various aldehydes with urea and alkyl acetoacetates under solvent-free conditions. The corresponding dihydropyrimidone products were obtained in high to excellent yields and selectivities at short reaction times. Moreover, the catalyst was recovered and successfully reused many times with no notable decrease in activity and selectivity.
Research Interests: Chemistry, Catalysis, PHOTOELECTRON SPECTROSCOPY, Ionic Liquid, Medicine, and 15 moreManganese, Ionic Liquids, Heterogeneous Catalysis, Porosity, Sorption, CHEMICAL SCIENCES, X ray diffraction, Particle Size, Scanning Electrochemical Microscopy, Biginelli reaction, Organosilicon Compounds, Molecular Structure, Selectivity, Aldehydes, and Mesoporous Material
Research Interests: Materials Science, Chemistry, Catalysis, Ionic Liquid, Medicine, and 13 moreIonic Liquids, Adsorption, Porosity, CHEMICAL SCIENCES, Thermal Stability, Fourier transform infrared spectroscopy, Thermogravimetric Analysis, Imidazoles, Organosilicon Compounds, Silicon Dioxide, Oxidation-Reduction, Alcohols, and Mesoporous Material
The preparation of yolk-shell structured magnetic mesoporous composites is a significant subject between researchers. Especially, modification of theses composites with ionic liquid/metal complex is very important for catalytic processes.... more
The preparation of yolk-shell structured magnetic mesoporous composites is a significant subject between researchers. Especially, modification of theses composites with ionic liquid/metal complex is very important for catalytic processes. In the present study, a novel magnetic methylene-based periodic mesoporous organosilica (PMO)-supported ionic liquid/Cu complex with yolk-shell structure (YS-Fe3O4@PMO/IL-Cu) was prepared via the soft template-assisted method. The TGA, FT-IR, SEM, EDX, XRD, VSM, nitrogen-sorption, and ICP techniques were employed to identify YS-Fe3O4@PMO/IL-Cu. The YS-Fe3O4@PMO/IL-Cu material was applied as a powerful nanocatalyst for the synthesis of pyranopyrazoles under ultrasonic media. The study demonstrated that the YS-Fe3O4@PMO/IL-Cu nanocatalyst is highly recyclable, selective, and effective. The leaching test was performed to investigate the nature of the designed catalyst under the applied conditions.
A novel core–shell structured magnetic cobalt oxide supported organosilica-sulfonic acid (Co3O4@SiO2/OS-SO3H) nanocomposite is prepared through a low-cost, simple, and clean method. The characterization of Co3O4@SiO2/OS-SO3H was performed... more
A novel core–shell structured magnetic cobalt oxide supported organosilica-sulfonic acid (Co3O4@SiO2/OS-SO3H) nanocomposite is prepared through a low-cost, simple, and clean method. The characterization of Co3O4@SiO2/OS-SO3H was performed by using Fourier transform infrared (FT-IR) spectroscopy, thermal gravimetric analysis (TGA), powder X-ray diffraction (PXRD), energy dispersive X-ray (EDX) spectroscopy, scanning electron microscopy (SEM), vibrating sample magnetometer (VSM), and transmission electron microscopy (TEM). The TGA and FT-IR results illustrate the high stability of the designed nanocomposite. The SEM image showed a size of about 40 nm for the Co3O4@SiO2/OS-SO3H nanoparticles. Furthermore, according to the result of VSM analysis, the saturation magnetization of this nanocomposite was about 25 emu/g. This novel material was used as an efficient nanocatalyst for the synthesis of biologically active tetrahydrobenzo[a]xanthen-11-one derivatives. These products were obtained...
A novel nano-graphene oxide supported ionic liquid/Fe (NGO/IL–Fe) is prepared, characterized and used as a powerful and highly recoverable nanocatalyst in the synthesis of tetrahydrobenzo[b]pyrans under green conditions.
Research Interests: Materials Science, Catalysis, Graphene, Nanomaterials, Ionic Liquid, and 4 moreChloride, Reusability, RSC, and Oxide
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Abstract The synthesis and catalytic application of a novel magnetic silica-nanomaterial-supported ionic liquid/hexamolybdate (Fe3O4@SiO2-IL/[Mo6O19]) are reported. The Fe3O4@SiO2-IL/[Mo6O19] nanocatalyst was prepared through modification... more
Abstract The synthesis and catalytic application of a novel magnetic silica-nanomaterial-supported ionic liquid/hexamolybdate (Fe3O4@SiO2-IL/[Mo6O19]) are reported. The Fe3O4@SiO2-IL/[Mo6O19] nanocatalyst was prepared through modification of magnetic Fe3O4@SiO2 nanoparticles with alkyl-imidazolium ionic liquids followed by treatment with hexamolybdate anions. The Fe3O4@SiO2-IL/[Mo6O19] was characterized using FTIR, EDX, TGA, SEM, TEM, PXRD, and VSM techniques. This nanocatalyst exhibited excellent activity in the one-pot synthesis of biologically active dihydropyrimidinones through the Biginelli reaction. Furthermore, this magnetically recoverable nanocatalyst could be reused at least seven times without a significant loss of efficiency.
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ABSTRACT
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A novel magnetic ionic liquid based periodic mesoporous organosilica supported palladium (Fe3O4@SiO2@IL-PMO/Pd) nanocomposite is synthesized, characterized and its catalytic performance is investigated in the Heck reaction. The... more
A novel magnetic ionic liquid based periodic mesoporous organosilica supported palladium (Fe3O4@SiO2@IL-PMO/Pd) nanocomposite is synthesized, characterized and its catalytic performance is investigated in the Heck reaction. The Fe3O4@SiO2@IL-PMO/Pd nanocatalyst was characterized using FT-IR, PXRD, SEM, TEM, VSM, TG, nitrogen-sorption and EDX analyses. This nanocomposite was effectively employed as catalyst in the Heck reaction to give corresponding arylalkenes in high yield. The recovery test was performed to study the catalyst stability and durability under applied conditions.
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A yolk–shell (YS) structured nanocomposite with magnetite core and methylene- and propylamine-based bifunctional periodic mesoporous organosilica (BPMO) shell (YS-Fe3O4@Am-PMO) was synthesized and employed as a powerful nanocatalyst for... more
A yolk–shell (YS) structured nanocomposite with magnetite core and methylene- and propylamine-based bifunctional periodic mesoporous organosilica (BPMO) shell (YS-Fe3O4@Am-PMO) was synthesized and employed as a powerful nanocatalyst for Knoevenagel condensation. The YS-Fe3O4@Am-PMO was synthesized via cetyltrimethylammonium bromide (CTAB) directed co-condensation of bis[(3-trimethoxysilyl)propyl]amine (BTMSPA) and bis(triethoxysilyl)methane (BTESM) around Fe3O4@SiO2 nanoparticles under basic conditions. The Fourier transform infrared spectroscopy (FT-IR), powder X-ray diffraction (PXRD), thermal gravimetric (TG), vibrating sample magnetometer (VSM), scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) analyses were used to characterize this nanocomposite. The catalytic activity of YS-Fe3O4@Am-PMO was successfully studied in the Knoevenagel condensation under both thermal and ultrasonic conditions. The YS-Fe3O4@Am-PMO nanocatalyst could be magnetically recovered and r...
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A novel aminopropyl-containing ionic liquid-based mesoporous organosilica was prepared and characterized and its catalytic performance was studied in the Knoevenagel condensation.