مرور Iranian Journal of Catalysis بر اساس عنوان
در حال نمایش موارد 1 - 20 از 384
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1,1’-(Ethane-1,2-diyl)dipyridinium bistribromide (EDPBT) as an organocatalyst for the silylation/desilylation reaction
(Islamic Azad University, Shahreza Branch, 2011-06-01)1,1'-(Ethane-1,2-diyl)dipyridinium bistribromide (EDPBT) was used as a chemoselective and effective organocatalyst for the silylation of hydroxyl groups as well as desilylation of trimethylsilyl ethers under mild conditions ...
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1,3-Dibromo-5,5-dimethylhydantoin (DBH) as a cheap and efficient catalyst for the synthesis of polyhydroquinolines and 12-aryl-8,9,10,12-tetrahydro [a] xanthene-11-ones
(Islamic Azad University, Shahreza Branch, 2013-06-01)1,3-Dibromo-5,5-dimethylhydantoin (DBH), as a cheap and commercially available reagent, is efficiently able to catalyze the synthesis of polyhydroquinoline derivatives and 12-aryl-8,9,10,12-tetrahydro[a] xanthene-11-ones ...
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2-Aminoethanesulfonic acid immobilized on epichlorohydrin functionalized Fe3O4@WO3 (Fe3O4@WO3-EAE-SO3H (III)): A heterogeneous and reusable nanocatalyst for synthesis of α,α'-bis (substituted-benzylidene) cycloalkanones in solvent-free conditions
(Islamic Azad University, Shahreza Branch, 2019-06-01)A green, efficient, chemoselective, facile and clean procedure is described and discussed for the synthesis of α, α'-bis (substituted-benzylidene) cycloalkanones in solvent-free conditions. The condensation reaction was ...
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3-Hydroxypropylammonium acetate (HPAA) ionic liquid: An effective acidic media in efficient conversion of anilines into aryl isocyanates
(Islamic Azad University, Shahreza Branch, 2014-09-01)A simple and mild procedure for the conversion of anilines into aryl isocyanates is described using the 3-hydroxypropylammonium acetate (HPAA) ionic liquid as a novel and efficient media has been explored in the synthesis ...
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Acacia concinna pod catalyzed synthesis of 2-arylbenzothia/(oxa)zole derivatives
(Islamic Azad University, Shahreza Branch, 2019-06-01)The expeditious synthesis of 2-aryl-benzothia/(oxa)zoles was carried out by the condensation of 2-aminothiophenol/2-aminophenol and diverse aryl aldehydes in presence of Acacia concinna as a biocatalyst under ...
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Acetylation of alcohol, phenols, thiols and amine promoted by succinimidinium hydrogensulfate ([H-Suc]HSO4) in the absence of solvent
(Islamic Azad University, Shahreza Branch, 2016-06-01)Succinimidinium hydrogensulfate ([H-Suc]HSO4), as a new and stable derivative of succinimide, is easily prepared by the reaction of succinimide with neat sulfuric acid. This ionic liquid can be used as an efficient catalyst ...
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Activity of Cu-Co-M (M= Ce, Ni, Au, Mg) catalysts prepared by coprecipitation method, calcined at high temperature for CO oxidation
(Islamic Azad University, Shahreza Branch, 2017-12-01)The present study deals with analysis of the activity of catalysts prepared by addition of different metals to Copper and Cobalt based catalysts for CO oxidation and the variation in activity caused by changes in composition. ...
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Adsorption of silver ions from aqueous solutions using copolymer containing sodium methacrylate functional groups
(Islamic Azad University, Shahreza Branch, 2021-09-01)The negative effects of silver, which is one of the heavy metals, on the environment are known. Hence, to remove this dangerous heavy metal from the environment, poly(methacrylic acid), whose adsorption capability has been ...
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An air stable and efficient palladium catalyst for Suzuki-Miyaura cross coupling reaction at room temperature
(Islamic Azad University, Shahreza Branch, 2016-12-01)The cross-coupling reaction between phenylboronic acid and various types of aryl halides (Suzuki reaction) was carried out using a catalytic amount of a new palladium catalyst (1-benzyl-3-(1-benzyl-1-methylpyrrolidin-1-ium-2-yl) ...
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AlHMS as an efficient catalyst for the synthesis of chromenes derivatives
(Islamic Azad University, Shahreza Branch, 2016-06-01)Catalytic activity of AlHMS was investigated as a cheap heterogeneous reusable catalyst in some multi-component reactions for the synthesis of various chromenes. Three-component reaction of 2-hydroxy-naphtoquinone with an ...
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Alkanedisulfamic acid functionalized silica-coated magnetic nanoparticles as a reusable efficient nanocatalyst for synthesis of gem-dihydroperoxides and 1,2,4,5-tetraoxanes
(Islamic Azad University, Shahreza Branch, 2017-03-01)Alkanedisulfamic acid functionalized silica-coated magnetic nanoparticles (ADSA-MNPs) were used as effective, low-cost and reusable solid heterogeneous nanomagnetic catalysts for conversion of aldehydes and ketones to ...
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Alkyl Ammonium Tungstate Bonded to Fe3O4@SiO2 Nanoparticles; a highly efficient Catalyst for the Oxidation of Symmetrical Sulfides to Symmetrical Sulfoxides
(Islamic Azad University, Shahreza Branch, 2023-12-01)A magnetic organic-inorganic hybrid of Fe3O4@SiO2-functionalized propylpiperazine-1,4-diium tungstate (A) nanoparticles with a spherical structure was prepared and completely characterized by XRD, SEM, TGA-DTA, and FT-IR ...
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Ammonium chloride catalyzed microwave-assisted synthesis of tetrahydrobenzo[b]pyrans
(Islamic Azad University, Shahreza Branch, 2016-06-01)In the present work, we have developed a mild, efficient, and environmentally benign method for the synthesis of tetrahydrobenzo[b]pyran derivatives via a three-component cyclocondensation of aldehydes, malononitrile and ...
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Ammonium monovanadate: a versatile and reusable catalyst for Friedel-Crafts alkylation and Michael addition of indoles
(Islamic Azad University, Shahreza Branch, 2014-06-01)Ammonium monovanadate (NH4VO3) has been devoted as an efficient, commercially available, eco-friendly and reusable catalyst for the synthesis of bis(indolyl)methanes (BIMs), oxindole derivatives and also Michael adducts ...
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Application of dimeric ortho-palladated complex of 2-methoxyphenethylamine in the Heck coupling reaction
(Islamic Azad University, Shahreza Branch, 2012-09-01)The application of the [Pd{C6H3(CH2CH2NH2)-4-OMe-5-κ2-C,N}(μ-Br)]2 complex of 2-methoxyphenethylamine in the Heck ...
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Application of Fe3O4/SiO2/CeO2 nanocomposite, an efficient and magnetic catalyst, to synthesize 2,3-dihydroquinazolin-4(1H)-ones derivatives
(Islamic Azad University, Shahreza Branch, 2022-06-01)A supported magnetic nanocomposite as a simple, stable, and efficient catalyst was successfully developed for condensation reaction of aldehydes, ammonium acetate, and isatoic anhydride to prepare 2,3-dihydroquinazolin-4(1H)-one ...
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Application of SBA-Pr-SO3H as a solid acid nanoreactor in the Biginelli reaction
(Islamic Azad University, Shahreza Branch, 2016-08-01)Sulfonic acid functionalized nanoporous silica (SBA-Pr-SO3H) with a pore size of 6 nm catalyzed three component coupling of aromatic aldehydes, urea and ethyl acetoacetate to afford the corresponding dihydropyrimidinones ...
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Application of silica vanadic acid as a dual Lewis and Bronsted acid catalytic ability in Dakin West reaction
(Islamic Azad University, Shahreza Branch, 2016-06-01)Silica Vanadic Acid, SVA, (oxo-vanadium has been supported on silica) as a dual Lewis and Bronsted acid ability was prepared and efficiently catalyzed one-pot multi-component condensation of enolizable ketones or alkyl ...
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Application of TiO2–zeolite as photocatalyst for photodegradation of some organic pollutants
(Islamic Azad University, Shahreza Branch, 2011-06-01)Immobilization of catalysts on the surface of some inert supports makes therecovering step easier. Because of the specific physicochemical properties, zeolites are good candidate as catalyst supports. In this study, zeolite ...
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Applying Taguchi method to optimize the synthesis conditions of ZrO2/TiO2/ZnO nanocomposite for high-performance photodegradation of Congo red
(Islamic Azad University, Shahreza Branch, 2021-03-01)In this work, ZrO2/TiO2/ZnO ternary nanocomposites were prepared by the sol-gel technique. The Taguchi method with the L9 orthogonal array was utilized to optimize the experimental conditions for the preparation of ...
