The Experts below are selected from a list of 195 Experts worldwide ranked by ideXlab platform
Lei Wang - One of the best experts on this subject based on the ideXlab platform.
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A Recyclable Magnetic Nanoparticles Supported Palladium Catalyst for the Hiyama Reaction of Aryltrialkoxysilanes with Aryl Halides.
ChemInform, 2013Co-Authors: Lei Zhang, Lei WangAbstract:A wide range of aryl iodides and bromides is applied in the Reaction with phenyl trimethyloxy- or triethyloxysilanes to afford biaryl derivatives in high yields.
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A recyclable magnetic nanoparticles supported palladium catalyst for the Hiyama Reaction of aryltrialkoxysilanes with aryl halides
Catalysis Science & Technology, 2012Co-Authors: Lei Zhang, Lei WangAbstract:A highly efficient and easily recoverable magnetic nanoparticles supported palladium catalyst has been developed and used in the Hiyama Reaction of aryltrialkoxysilanes with a variety of organic halides. The Reactions generated the corresponding products in good yields. In addition, the supported catalyst exhibited high stability and could be recovered and reused at least 10 times without significant loss of its catalytic activity.
Miguel Yus - One of the best experts on this subject based on the ideXlab platform.
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1,2-Functionalized Imidazoles as Palladium Ligands: An Efficient and Robust Catalytic System for the Fluorine-Free Hiyama Reaction.
ChemInform, 2014Co-Authors: Regina Martínez, Isidro M. Pastor, Miguel YusAbstract:An imidazole derivative is found to be an efficient ligand for the Pd-catalyzed coupling of aryl bromides and chlorides with aryl siloxanes using microwave irradiation under fluorine-free and solvent-free conditions.
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1 2 functionalized imidazoles as palladium ligands an efficient and robust catalytic system for the fluorine free Hiyama Reaction
European Journal of Organic Chemistry, 2014Co-Authors: Regina Martínez, Isidro M. Pastor, Miguel YusAbstract:Financial support from the Spanish Ministerio de Ciencia e Innovacion (MICINN) (project numbers CTQ2007-65218, CTQ2011-24165), from Consolider Ingenio 2010 (CSD2007-00006), from the Generalitat Valenciana (PROMETEO/2009/039), from the Fondos Europeos para el Desarrollo Regional (FEDER) and from the Universidad de Alicante is acknowledged.
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1,2‐Functionalized Imidazoles as Palladium Ligands: An Efficient and Robust Catalytic System for the Fluorine‐Free Hiyama Reaction
European Journal of Organic Chemistry, 2013Co-Authors: Regina Martínez, Isidro M. Pastor, Miguel YusAbstract:Financial support from the Spanish Ministerio de Ciencia e Innovacion (MICINN) (project numbers CTQ2007-65218, CTQ2011-24165), from Consolider Ingenio 2010 (CSD2007-00006), from the Generalitat Valenciana (PROMETEO/2009/039), from the Fondos Europeos para el Desarrollo Regional (FEDER) and from the Universidad de Alicante is acknowledged.
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NHC-Ligand Effectiveness in the Fluorine-Free Hiyama Reaction of Aryl Halides†
European Journal of Organic Chemistry, 2012Co-Authors: Itziar Peñafiel, Isidro M. Pastor, Miguel YusAbstract:Financial support from the Spanish Ministerio de Ciencia e Innovacion (MICINN) (project numbers CTQ2007-65218, CTQ2011-24165), from Consolider Ingenio 2010 (CSD2007-00006), from the Generalitat Valenciana (PROMETEO/2009/0349), and from the Fondos Europeos para el Desarrollo Regional (FEDER) is acknowledged. I. P. thanks the MICINN for a predoctoral fellowship.
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(NHC)Palladium Complexes from Hydroxy-Functionalized Imidazolium Salts as Catalyst for the Microwave-Accelerated Fluorine-Free Hiyama Reaction.
ChemInform, 2012Co-Authors: Itziar Peñafiel, Isidro M. Pastor, Miguel Yus, Miguel A. Esteruelas, Montserrat Oliván, Enrique OñateAbstract:Catalyst (I), readily available from the imidazolium salt and Pd(O-Ac)2, is isolated as an air-stable greyish solid, which exists in solution at room temperature as a mixture of diastereomers.
Carmen Najera - One of the best experts on this subject based on the ideXlab platform.
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the first fluoride free Hiyama Reaction of vinylsiloxanes promoted by sodium hydroxide in water
Advanced Synthesis & Catalysis, 2006Co-Authors: Emilio Alacid, Carmen NajeraAbstract:The first cross-coupling Reaction between vinylalkoxysilanes and aryl bromides or chlorides promoted by aqueous sodium hydroxide under fluoride-free conditions to provide styrenes is reported. The Reaction is catalyzed by palladium(II) acetate or a 4-hydroxyacetophenone oxime-derived palladacycle either under thermal or microwave heating at 120 °C with low catalyst loading (0.01–1 mol % of palladium) in the presence of tetra-n-butylammonium bromide (TBAB) as additive in air. In the case of styryltriethoxysilane, the coupling with aryl or vinyl bromides takes place stereospecifically to give the corresponding stilbenes or dienes, respectively. These mild and simple Reaction conditions prevent undesirable polymerization of the products.
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Solvent-less and fluoride-free Hiyama Reaction of arylsiloxanes with aryl bromides and chlorides promoted by sodium hydroxide : A useful protocol for palladium recycling and product isolation
Advanced Synthesis & Catalysis, 2006Co-Authors: Emilio Alacid, Carmen NajeraAbstract:Palladium salts and oxime-derived palladacycles catalyze the cross-coupling Reaction of arylsiloxanes with aryl bromides and chlorides in low catalyst loading (0.001–0.1 mol % of Pd) under fluoride-free conditions to provide biaryls and heterobiaryls. For some deactivated aryl bromides and for aryl chlorides, the corresponding cross-couplings need TBAB as additive. Concentrated aqueous sodium hydroxide (50%) promoted this Hiyama Reaction in practically the absence of solvents under air in good yields. The process can be performed at 120 °C either under heating in a pressure tube or under microwave irradiation. This protocol allows palladium recycling and facilitates the final isolation of the products simply by ether extraction.
Lei Zhang - One of the best experts on this subject based on the ideXlab platform.
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A Recyclable Magnetic Nanoparticles Supported Palladium Catalyst for the Hiyama Reaction of Aryltrialkoxysilanes with Aryl Halides.
ChemInform, 2013Co-Authors: Lei Zhang, Lei WangAbstract:A wide range of aryl iodides and bromides is applied in the Reaction with phenyl trimethyloxy- or triethyloxysilanes to afford biaryl derivatives in high yields.
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A recyclable magnetic nanoparticles supported palladium catalyst for the Hiyama Reaction of aryltrialkoxysilanes with aryl halides
Catalysis Science & Technology, 2012Co-Authors: Lei Zhang, Lei WangAbstract:A highly efficient and easily recoverable magnetic nanoparticles supported palladium catalyst has been developed and used in the Hiyama Reaction of aryltrialkoxysilanes with a variety of organic halides. The Reactions generated the corresponding products in good yields. In addition, the supported catalyst exhibited high stability and could be recovered and reused at least 10 times without significant loss of its catalytic activity.
Emilio Alacid - One of the best experts on this subject based on the ideXlab platform.
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the first fluoride free Hiyama Reaction of vinylsiloxanes promoted by sodium hydroxide in water
Advanced Synthesis & Catalysis, 2006Co-Authors: Emilio Alacid, Carmen NajeraAbstract:The first cross-coupling Reaction between vinylalkoxysilanes and aryl bromides or chlorides promoted by aqueous sodium hydroxide under fluoride-free conditions to provide styrenes is reported. The Reaction is catalyzed by palladium(II) acetate or a 4-hydroxyacetophenone oxime-derived palladacycle either under thermal or microwave heating at 120 °C with low catalyst loading (0.01–1 mol % of palladium) in the presence of tetra-n-butylammonium bromide (TBAB) as additive in air. In the case of styryltriethoxysilane, the coupling with aryl or vinyl bromides takes place stereospecifically to give the corresponding stilbenes or dienes, respectively. These mild and simple Reaction conditions prevent undesirable polymerization of the products.
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Solvent-less and fluoride-free Hiyama Reaction of arylsiloxanes with aryl bromides and chlorides promoted by sodium hydroxide : A useful protocol for palladium recycling and product isolation
Advanced Synthesis & Catalysis, 2006Co-Authors: Emilio Alacid, Carmen NajeraAbstract:Palladium salts and oxime-derived palladacycles catalyze the cross-coupling Reaction of arylsiloxanes with aryl bromides and chlorides in low catalyst loading (0.001–0.1 mol % of Pd) under fluoride-free conditions to provide biaryls and heterobiaryls. For some deactivated aryl bromides and for aryl chlorides, the corresponding cross-couplings need TBAB as additive. Concentrated aqueous sodium hydroxide (50%) promoted this Hiyama Reaction in practically the absence of solvents under air in good yields. The process can be performed at 120 °C either under heating in a pressure tube or under microwave irradiation. This protocol allows palladium recycling and facilitates the final isolation of the products simply by ether extraction.