The Experts below are selected from a list of 10656 Experts worldwide ranked by ideXlab platform
Akbar Heydari - One of the best experts on this subject based on the ideXlab platform.
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nanomagnetically modified sulfuric acid γ fe2o3 sio2 oso3h an efficient fast and reusable Catalyst for greener paal knorr pyrrole synthesis
Catalysis Letters, 2014Co-Authors: Samaneh Cheraghi, Dariush Saberi, Akbar HeydariAbstract:Paal–Knorr pyrrole synthesis was performed in the presence of superparamagnetic nanoparticles of modified sulfuric acid (γ-Fe2O3@SiO2-OSO3H) as an efficient and magnetically separable Catalyst. Recovery of the Catalyst was simple using a magnet, allowing its reuse without significant loss of its catalytic activity (over five cycles).
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nanomagnetically modified sulfuric acid γ fe 2 o 3 sio 2 oso 3 h an efficient fast and reusable Catalyst for greener paal knorr pyrrole synthesis
Catalysis Letters, 2014Co-Authors: Samaneh Cheraghi, Dariush Saberi, Akbar HeydariAbstract:Paal–Knorr pyrrole synthesis was performed in the presence of superparamagnetic nanoparticles of modified sulfuric acid (γ-Fe2O3@SiO2-OSO3H) as an efficient and magnetically separable Catalyst. Recovery of the Catalyst was simple using a magnet, allowing its reuse without significant loss of its catalytic activity (over five cycles).
Samaneh Cheraghi - One of the best experts on this subject based on the ideXlab platform.
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nanomagnetically modified sulfuric acid γ fe2o3 sio2 oso3h an efficient fast and reusable Catalyst for greener paal knorr pyrrole synthesis
Catalysis Letters, 2014Co-Authors: Samaneh Cheraghi, Dariush Saberi, Akbar HeydariAbstract:Paal–Knorr pyrrole synthesis was performed in the presence of superparamagnetic nanoparticles of modified sulfuric acid (γ-Fe2O3@SiO2-OSO3H) as an efficient and magnetically separable Catalyst. Recovery of the Catalyst was simple using a magnet, allowing its reuse without significant loss of its catalytic activity (over five cycles).
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nanomagnetically modified sulfuric acid γ fe 2 o 3 sio 2 oso 3 h an efficient fast and reusable Catalyst for greener paal knorr pyrrole synthesis
Catalysis Letters, 2014Co-Authors: Samaneh Cheraghi, Dariush Saberi, Akbar HeydariAbstract:Paal–Knorr pyrrole synthesis was performed in the presence of superparamagnetic nanoparticles of modified sulfuric acid (γ-Fe2O3@SiO2-OSO3H) as an efficient and magnetically separable Catalyst. Recovery of the Catalyst was simple using a magnet, allowing its reuse without significant loss of its catalytic activity (over five cycles).
Yanli Zhao - One of the best experts on this subject based on the ideXlab platform.
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double shelled hollow rods assembled from nitrogen sulfur codoped carbon coated indium oxide nanoparticles as excellent photoCatalysts
Nature Communications, 2019Co-Authors: Liming Sun, Wenwen Zhan, Yusheng Yuan, Xiaojun Wang, Xiguang Han, Yanli ZhaoAbstract:Excellent catalytic activity, high stability and easy Recovery are three key elements for fabricating efficient photoCatalysts, while developing a simple method to fabricate such photoCatalysts with these three features at the same time is highly challenging. In this study, we successfully synthesized double-shelled hollow rods (DHR) assembled by nitrogen (N) and sulfur (S)-codoped carbon coated indium(III) oxide (In2O3) ultra-small nanoparticles (N,S-C/In2O3 DHR). N,S-C/In2O3 DHR exhibits remarkable photocatalytic activity, high stability and easy Recovery for oxidative hydroxylation reaction of arylboronic acid substrates. The Catalyst Recovery and surface area were well balanced through improved light harvesting, contributed by concurrently enhancing the reflection on the outer porous shell and the diffraction in the inside double-shelled hollow structure, and increased separation rate of photogenerated carriers. Photocatalytic mechanism was investigated to identify the main reactive species in the catalytic reactions. The electron separation and transfer pathway via N,S-codoped graphite/In2O3 interface was revealed by theoretical calculations. While photoredox catalysis presents exciting avenues for molecular transformations, balancing optimal photochemical and materials properties can be challenging. Here, the authors prepare carbon-coated In2O3 nanoparticles as recoverable photoCatalysts for arylboronic acid oxidative hydroxylation.
Bhalchandra M. Bhanage - One of the best experts on this subject based on the ideXlab platform.
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Synthesis of oxamate and urea by oxidative single and double carbonylation of amines using immobilized palladium metal-containing ionic liquid@SBA-15
Journal of Molecular Catalysis A: Chemical, 2015Co-Authors: Sandip T Gadge, Etty N. Kusumawati, Kei Harada, Takehiko Sasaki, Daisuke Nishio-hamane, Bhalchandra M. BhanageAbstract:Abstract A promising route for the synthesis of oxamate and urea by oxidative carbonylation of amine is described using immobilized palladium metal-containing ionic liquid onto mesoporous silica (ImmPd-IL-@SBA-15). Adequate adjustments of the different reaction parameters such as solvent, additives temperature, and substrate to achieve optimal Catalyst performance were made using ImmPd-IL@SBA-15 as a catalytic system. The ImmPd-IL@SBA-15 Catalyst along with NaI promoter showed high selectivity to the desired products over several amine compounds such as aliphatic, aromatic, allylic etc. The secondary amines selectively cross double carbonylated with alcohol to give the oxamate derivatives and the primary amines provided the urea as a product by the single carbonylation. The fresh and recycled Catalyst was characterized using XPS and TEM-EDX analysis. The carbonylation route proposed here eliminates the need for corrosive, moisture-sensitive, thermally unstable monoesters of oxalyl chlorides and provides a cleaner synthetic route for the synthesis of oxamates using ImmPd-IL@SBA-15 as a heterogeneous and reusable Catalyst. Notably reaction does not require air/moisture sensitive phosphine ligands, co-Catalyst and dehydrating agent with an additional advantage of palladium Catalyst Recovery and reuse for up to six consecutive cycles without loss in activity and selectivity.
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pd c an efficient and heterogeneous protocol for oxidative carbonylation of diols to cyclic carbonate
Tetrahedron Letters, 2014Co-Authors: Sujit P Chavan, Bhalchandra M. BhanageAbstract:Abstract The present protocol involves highly efficient and practical approach for the synthesis of cyclic carbonate via oxidative carbonylation of diols, glycerol, and its derivatives using Pd/C as a heterogeneous, inexpensive, and recyclable Catalyst. The effect of various reaction parameters, such as solvent, base, time, and temperature was investigated and applied for the synthesis of value added cyclic carbonates in a good to excellent yield within shorter reaction time. The developed catalytic system circumvents the use of ligand and dehydrating agent with an additional advantage of palladium Catalyst Recovery and reuse for up to four consecutive cycles.
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synthesis of α β alkynyl esters and unsymmetrical maleate esters catalyzed by pd c an efficient phosphine free catalytic system for oxidative alkoxycarbonylation of terminal alkynes
ChemInform, 2013Co-Authors: Sandip T Gadge, Bhalchandra M. BhanageAbstract:Pd/C-catalyzed oxidative alkoxycarbonylation of terminal alkynes using alcohols in the presence of tetrabutylammonium iodide under CO/O2 (5:1 atm) has been investigated. The desired α,β-alkynyl esters and unsymmetrical maleate esters are formed in good to excellent yields under different reaction conditions. The present protocol eliminates the use of phosphine ligands and has straightforward Catalyst Recovery. The Catalyst was recycled up to six times without significant loss of catalytic activity.
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pd c catalyzed synthesis of oxamates by oxidative cross double carbonylation of amines and alcohols under co Catalyst base dehydrating agent and ligand free conditions
Journal of Organic Chemistry, 2013Co-Authors: Sandip T Gadge, Bhalchandra M. BhanageAbstract:This work reports a mild, efficient, and ligand-free Pd/C-catalyzed protocol for the oxidative cross double carbonylation of amines and alcohols. Notably, the reaction does not requires any base, co-Catalyst, dehydrating agent, or ligand. Pd/C solves the problem of Catalyst Recovery, and the Catalyst was recycled up to six times.
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immobilized palladium metal containing ionic liquid catalyzed alkoxycarbonylation phenoxycarbonylation and aminocarbonylation reactions
ACS Catalysis, 2013Co-Authors: Mayur V Khedkar, Takehiko Sasaki, Bhalchandra M. BhanageAbstract:Immobilized palladium metal-containing ionic liquid (ImmPd-IL), a structurally well-defined transition metal complex, is explored as an immobilized, phosphine-free Catalyst for carbonylation reactions, including alkoxycarbonylation, phenoxycarbonylation, and aminocarbonylation reactions. The effect of various reaction parameters, such as solvent, base, time, temperature, and CO pressure on carbonylation reactions using ImmPd-IL Catalyst was investigated. The optimized protocol was applied to a wide variety of substituted aryl iodides and various alcohol/phenols and amines having different steric and electronic properties and afforded the corresponding products in good to excellent yield. The developed catalytic system circumvents the use of phosphine ligands, with an additional advantage of palladium Catalyst Recovery and reuse for up to four consecutive cycles. The recycled Catalyst was characterized using XPS analysis.
Dariush Saberi - One of the best experts on this subject based on the ideXlab platform.
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nanomagnetically modified sulfuric acid γ fe2o3 sio2 oso3h an efficient fast and reusable Catalyst for greener paal knorr pyrrole synthesis
Catalysis Letters, 2014Co-Authors: Samaneh Cheraghi, Dariush Saberi, Akbar HeydariAbstract:Paal–Knorr pyrrole synthesis was performed in the presence of superparamagnetic nanoparticles of modified sulfuric acid (γ-Fe2O3@SiO2-OSO3H) as an efficient and magnetically separable Catalyst. Recovery of the Catalyst was simple using a magnet, allowing its reuse without significant loss of its catalytic activity (over five cycles).
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nanomagnetically modified sulfuric acid γ fe 2 o 3 sio 2 oso 3 h an efficient fast and reusable Catalyst for greener paal knorr pyrrole synthesis
Catalysis Letters, 2014Co-Authors: Samaneh Cheraghi, Dariush Saberi, Akbar HeydariAbstract:Paal–Knorr pyrrole synthesis was performed in the presence of superparamagnetic nanoparticles of modified sulfuric acid (γ-Fe2O3@SiO2-OSO3H) as an efficient and magnetically separable Catalyst. Recovery of the Catalyst was simple using a magnet, allowing its reuse without significant loss of its catalytic activity (over five cycles).