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One Pot Esterification as Well as Transesterification of Waste Cooking Oil using Potassium and Phosphotungstic Acid Supported Silica: Optimization and Kinetic Modeling
AbstractIn order to prepare the heterogeneous catalyst, phosphotungstic acid (PTA, H 3 PW 12 O 40 ) and K + were supported over silica matrix for...
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Brønsted acid-enhanced direct hydrogen atom transfer photocatalysis for selective functionalization of unactivated C(sp3)–H bonds
The manipulation of unactivated aliphatic C–H bonds remains one of the most challenging tasks in synthetic chemistry. Direct hydrogen atom transfer...
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An unprecedented synthesis of axially chiral biaryls by rearrangement and aromatization of carbocations with central-to-axial conversion of chirality
The central-to-axial chirality conversion represents a fascinating class of chemical processes consisting of the destruction of stereogenic centers...
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Redox-neutral ipso/ortho alkenylcyanation of (hetero)arylboronic acid enabled by 1,4-rhodium migration and fragmentation
A mild, chemoselective, redox-neutral ipso/ortho alkenylcyanation of arylboronic acids with homopropargylic malononitriles via 1,4-rhodium migration...
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Pt–Zn Bimetallic Nanoclusters Encapsulated in SAPO-11 Molecular Sieve with Excellent Catalytic Performance for Levulinic Acid Hydrogenation
Well-dispersed Pt–Zn nanoclusters encapsulated in the mesopores of SAPO-11 were prepared by a one-pot synthesis method using dipropylamine to anchor...
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Montmorillonite K10 clay promoted one-pot pseudo-five-component synthesis of 5-cyano-6-(phenylthio)-2-((1-phenylvinyl)imino)-4- aryl(or heteroaryl)-2H-pyran-3-carboxylic acid derivatives and their potential cytotoxic activity
A facile green accessibility for the synthesis of novel, distinctly substituted 2H-pyran analogues employing montmorillonite K10 clay as a...
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Unprecedented green chemistry approach: tungstophosphoric acid encapsulated in MOF 199 as competent acid catalyst for some significant organic transformations
In the work, a series of new 12-tungstophosphoric acid (HPW) encapsulated MOF 199 catalysts were synthesized by simple and convenient one step...
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Polymer Supported Ferric Chloride as Heterogeneous Catalyst for Three Component Biginelli Reaction
Polymer supported ferric chloride catalyst is prepared and characterized by IR, SEM, TEM, EDS, TGA, ICP-MS and XRD. The heterogenized Lewis acid...
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Deoxygenative Suzuki–Miyaura arylation of tertiary alcohols through silyl ethers
Conventional Suzuki–Miyaura arylations use halogenated compounds as electrophilic coupling partners. Although the catalytic activation of...
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Use of N,N-Coordinating Ligands in Catalytic Asymmetric C--C Bond Formations: Example of Cyclopropanation, Diels--Alder Reaction, Nucleophilic Allylic Substitution
Chiral N,N-coordinating ligands have been particularly synthesized for their use as metal chelates catalyzing asymmetric C-C bond formations....
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Metal-containing zeolite composites with separated phases as catalysts for hydroisomerization of linear hexane
In this work, composite catalytic systems of natural mordenite and synthetic MFI-type zeolite containing Pd and Ni nanoparticles (0.5–1.5% by weight...
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Recent Trends in Photocatalytic Enantioselective Reactions
Enantioselective synthesis through photocatalysis is one of the highly preferred approaches towards preparation of optically active compounds. This...
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Synthesis of alkenyl boronates through stereoselective vinylene homologation of organoboronates
Matteson homologation of organoboronates is an attractive approach for constructing aliphatic carbon chains via iterative insertion of carbenoids....
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WOx/ZrO2 catalysts for the conversion of α-angelica lactone with butanol to butyl levulinates
WO x /ZrO 2 catalysts with different tungsten loadings were prepared via wet impregnation, wherein the presence of WO 3 appreciably altered the textural...
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A mechanistic study on conversion of carbon dioxide into formic acid promoted by 1-ethyl-2, 3-dimethyl-imidazolium nitrite
ContextThe conversion of carbon dioxide (CO 2 ) to formic acid (FA) through hydrogenation using 1-ethyl-2,3- dimethyl imidazolium nitrite (EDIN) ionic...
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Catalytic role of various clay minerals during the thermal reaction process with oxidized and pyrolyzed oils
This study evaluated this thermal reaction behavior of oxidized and pyrolyzed oils containing diverse clay minerals by means of differential scanning...
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Single-Ni-atoms on nitrogenated humic acid based porous carbon for CO2 electroreduction
We proposed a facile synthesis of single-Ni-atom catalysts on low-cost porous carbon using a calcination method at the temperatures of 850–1000 °C,...
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Efficient production of 5-hydroxymethylfurfural from fructose catalyzed by acidic ion-functionalized porous carbon solid acid
Efficient production of 5-hydroxymethylfurfural (5-HMF) from fructose dehydration is a crucial step of biomass to chemicals and fuels. Herein, a...
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Reactions of quinoline-2(6,8)-carbaldehydes with arenes by the action of various Brønsted or Lewis acids: synthesis of diarylmethylquinolines
The reactions of quinoline-2(6,8)-carbaldehydes with arenes by the action of strong Brønsted (H 2 SO 4 , CF 3 SO 3 H) or Lewis (AlCl 3 , AlBr 3 ) acids led to...
