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Hansgunther Schmalz - One of the best experts on this subject based on the ideXlab platform.
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pd catalyzed cross coupling of haloarenes and Chloroarene cr co 3 complexes with stabilized vinyl and allylaluminium reagents
Synlett, 2003Co-Authors: Herbert Schumann, Jens Kaufmann, Hansgunther Schmalz, Andreas Bottcher, Battsengel GotovAbstract:The palladium-catalyzed cross-coupling of intramolecularly stabilized divinyl- and diallylaluminium compounds 1 and 2 with haloarenes and Chloroarene-Cr(CO) 3 complexes has been studied. The coupling products were obtained in high yields (up to 98%) under relatively mild conditions (40-60 °C in THF, 3-12 h) in the presence of 5-10 mol% of PdCl 2 (PPh 3 ) 2 .
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pd catalyzed carbonylative cross coupling reactions of Chloroarene cr co 3 complexes
Synlett, 2002Co-Authors: Battsengel Gotov, Jens Kaufmann, Herbert Schumann, Hansgunther SchmalzAbstract:Palladium-catalyzed carbonylative cross-methylation reactions of different Chloroarene-Cr(CO) 3 complexes employing an intramolecularly stabilized dimethylindium (III) reagent have been studied. The coupling products (acetophenone derivatives) were isolated in 43-96% yield under standard reaction conditions (5 mol% PdCl 2 (PPh 3 ) 2 , 50 °C, 5 atm CO-pressure in THF). Also, carbonylative Suzuki-coupling reactions of phenylboronic acid with different Chloroarene-Cr(CO) 3 complexes afforded the corresponding benzophenone derivatives in 48-78% yield under comparable conditions in the presence of potassium carbonate as a base.
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pd catalyzed cross coupling of Chloroarene cr co 3 complexes with stabilized organoindium iii reagents under remarkably mild conditions
Synlett, 2002Co-Authors: Battsengel Gotov, Jens Kaufmann, Herbert Schumann, Hansgunther SchmalzAbstract:The palladium catalyzed cross-methylation of intramolecularly stabilized dimethylindium (III) compounds (3 and 4) with different Chloroarene-Cr(CO) 3 complexes have been studied. Under mild conditions (40 °C in THF, 3 h) high yields (up to 96%) of the coupling products were obtained in the presence of 1-10 mol% of PdCl 2 (PPh 3 ) 2 . With MeMgCl almost no conversion was observed under the same conditions.
Battsengel Gotov - One of the best experts on this subject based on the ideXlab platform.
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pd catalyzed cross coupling of haloarenes and Chloroarene cr co 3 complexes with stabilized vinyl and allylaluminium reagents
Synlett, 2003Co-Authors: Herbert Schumann, Jens Kaufmann, Hansgunther Schmalz, Andreas Bottcher, Battsengel GotovAbstract:The palladium-catalyzed cross-coupling of intramolecularly stabilized divinyl- and diallylaluminium compounds 1 and 2 with haloarenes and Chloroarene-Cr(CO) 3 complexes has been studied. The coupling products were obtained in high yields (up to 98%) under relatively mild conditions (40-60 °C in THF, 3-12 h) in the presence of 5-10 mol% of PdCl 2 (PPh 3 ) 2 .
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pd catalyzed carbonylative cross coupling reactions of Chloroarene cr co 3 complexes
Synlett, 2002Co-Authors: Battsengel Gotov, Jens Kaufmann, Herbert Schumann, Hansgunther SchmalzAbstract:Palladium-catalyzed carbonylative cross-methylation reactions of different Chloroarene-Cr(CO) 3 complexes employing an intramolecularly stabilized dimethylindium (III) reagent have been studied. The coupling products (acetophenone derivatives) were isolated in 43-96% yield under standard reaction conditions (5 mol% PdCl 2 (PPh 3 ) 2 , 50 °C, 5 atm CO-pressure in THF). Also, carbonylative Suzuki-coupling reactions of phenylboronic acid with different Chloroarene-Cr(CO) 3 complexes afforded the corresponding benzophenone derivatives in 48-78% yield under comparable conditions in the presence of potassium carbonate as a base.
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pd catalyzed cross coupling of Chloroarene cr co 3 complexes with stabilized organoindium iii reagents under remarkably mild conditions
Synlett, 2002Co-Authors: Battsengel Gotov, Jens Kaufmann, Herbert Schumann, Hansgunther SchmalzAbstract:The palladium catalyzed cross-methylation of intramolecularly stabilized dimethylindium (III) compounds (3 and 4) with different Chloroarene-Cr(CO) 3 complexes have been studied. Under mild conditions (40 °C in THF, 3 h) high yields (up to 96%) of the coupling products were obtained in the presence of 1-10 mol% of PdCl 2 (PPh 3 ) 2 . With MeMgCl almost no conversion was observed under the same conditions.
Hidehiro Sakurai - One of the best experts on this subject based on the ideXlab platform.
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low temperature carbon chlorine bond activation by bimetallic gold palladium alloy nanoclusters an application to ullmann coupling
ChemInform, 2013Co-Authors: Raghu Nath Dhital, Choavarit Kamonsatikul, Ekasith Somsook, Karan Bobuatong, Masahiro Ehara, Sangita Karanjit, Hidehiro SakuraiAbstract:Bimetallic gold/palladium alloy nanoclusters are found to be efficient catalysts in the Ullmann coupling of Chloroarenes in aqueous media at low temperatures.
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low temperature carbon chlorine bond activation by bimetallic gold palladium alloy nanoclusters an application to ullmann coupling
Journal of the American Chemical Society, 2012Co-Authors: Raghu Nath Dhital, Choavarit Kamonsatikul, Ekasith Somsook, Karan Bobuatong, Masahiro Ehara, Sangita Karanjit, Hidehiro SakuraiAbstract:This paper describes the unique catalytic activity of bimetallic Au/Pd alloy nanoclusters (NCs) for Ullmann coupling of Chloroarenes in aqueous media at low temperature. The corresponding reaction cannot be achieved by monometallic Au and Pd NCs as well as their physical mixtures. On the basis of quantum chemical calculation, it was found that the crucial step to govern the unusual catalytic activity of Au/Pd is the dissociative chemisorption of ArCl, which is unlikely in the monometallic Au and Pd NCs.
Herbert Schumann - One of the best experts on this subject based on the ideXlab platform.
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pd catalyzed cross coupling of haloarenes and Chloroarene cr co 3 complexes with stabilized vinyl and allylaluminium reagents
Synlett, 2003Co-Authors: Herbert Schumann, Jens Kaufmann, Hansgunther Schmalz, Andreas Bottcher, Battsengel GotovAbstract:The palladium-catalyzed cross-coupling of intramolecularly stabilized divinyl- and diallylaluminium compounds 1 and 2 with haloarenes and Chloroarene-Cr(CO) 3 complexes has been studied. The coupling products were obtained in high yields (up to 98%) under relatively mild conditions (40-60 °C in THF, 3-12 h) in the presence of 5-10 mol% of PdCl 2 (PPh 3 ) 2 .
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pd catalyzed carbonylative cross coupling reactions of Chloroarene cr co 3 complexes
Synlett, 2002Co-Authors: Battsengel Gotov, Jens Kaufmann, Herbert Schumann, Hansgunther SchmalzAbstract:Palladium-catalyzed carbonylative cross-methylation reactions of different Chloroarene-Cr(CO) 3 complexes employing an intramolecularly stabilized dimethylindium (III) reagent have been studied. The coupling products (acetophenone derivatives) were isolated in 43-96% yield under standard reaction conditions (5 mol% PdCl 2 (PPh 3 ) 2 , 50 °C, 5 atm CO-pressure in THF). Also, carbonylative Suzuki-coupling reactions of phenylboronic acid with different Chloroarene-Cr(CO) 3 complexes afforded the corresponding benzophenone derivatives in 48-78% yield under comparable conditions in the presence of potassium carbonate as a base.
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pd catalyzed cross coupling of Chloroarene cr co 3 complexes with stabilized organoindium iii reagents under remarkably mild conditions
Synlett, 2002Co-Authors: Battsengel Gotov, Jens Kaufmann, Herbert Schumann, Hansgunther SchmalzAbstract:The palladium catalyzed cross-methylation of intramolecularly stabilized dimethylindium (III) compounds (3 and 4) with different Chloroarene-Cr(CO) 3 complexes have been studied. Under mild conditions (40 °C in THF, 3 h) high yields (up to 96%) of the coupling products were obtained in the presence of 1-10 mol% of PdCl 2 (PPh 3 ) 2 . With MeMgCl almost no conversion was observed under the same conditions.
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dichlorobis triphenylphosphine nickel catalyzed cross coupling of aryl chlorides with intramolecularly stabilized group 13 metal alkylating reagents
Tetrahedron Letters, 2000Co-Authors: Dmitri Gelman, Herbert Schumann, Jochanan BlumAbstract:Abstract The intramolecularly stabilized alkyl and aryl aluminum complexes 1 , 4 and 11 , as well as the indium compounds 6 , 9 and 10 cross-couple with a variety of Chloroarenes at 80°C in the presence of NiCl 2 (PPh 3 ) 2 to give selectively the respective alkylated arenes in high yields. Addition of organic or inorganic bases lowers the reaction temperature to 50°C.
Jeanfrancois Carpentier - One of the best experts on this subject based on the ideXlab platform.
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controlled radical polymerization of conjugated 1 3 dienes with methyl 1 3 butadiene 1 phosphonate
Polymer, 2008Co-Authors: Noureddine Ajellal, Christophe M Thomas, Jeanfrancois CarpentierAbstract:Abstract Preparation of new tailor-made phosphorus-containing polydiene materials via controlled radical copolymerization of dimethyl 1,3-butadiene-1-phosphonate (BP Me ) with chloroprene (CP) or isoprene (IP), by using, respectively, AIBN or an alkoxyamine derivative as initiator, is reported. The corresponding materials have been microstructurally characterized by 1 H and 31 P NMR spectroscopies.
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oxidative addition of cationic η6 Chloroarene tricarbonylmanganese compounds to palladium 0 complexes synthesis characterisation and reactivity
Journal of Organometallic Chemistry, 1995Co-Authors: Jeanfrancois Carpentier, Yves Castanet, Jacques Brocard, Andre Mortreux, Francoise Rosemunch, Claudine Susanne, Eric RoseAbstract:Abstract The oxidative addition of the coordinated Chloroarene in [(4-RC 6 H 4 Cl)Mn(CO) 3 ][X] (R H, OCH 3 ; X PF 6 , BF 4 ) to [Pd(PPh 3 ) 4 ] proceeds readily at room temperature to give [{ η 6 -[{PdCl(PPh 3 ) 2 }(4-RC 6 H 4 )Mn(CO) 3 )][X]. 31 P{ 1 H} NMR analysis of these square-planar palladium complexes revealed that the phosphorus ligands are cis . In contrast to their tricarbonylchromium analogues, these manganese complexes could not be carbonylated because the electron-withdrawing effect of the Mn(CO) 3 + moiety is too strong.
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competitive nucleophilic aromatic substitution and palladium catalyzed alkoxycarbonylation of substituted Chloroarene cr co 3 complexes
Tetrahedron Letters, 1994Co-Authors: Jeanfrancois Carpentier, Yves Castanet, Jacques Brocard, Eric Finet, Andre MortreuxAbstract:Abstract The reaction of Cr(CO) 3 -complexed Chloroarenes with HCO 2 CH 3 and NaOCH 3 in the presence of a catalytic amount of PdCl 2 (PPh 3 ) 2 gives esters in good yields provided that the arene is substituted by an electron-donating group, whereas the presence of an electron-withdrawing substituent on the aromatic ring leads to ethers via an ipso nucleophilic aromatic substitution.
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palladium catalyzed carbon carbon bond formation from η6 Chloroarene cr co 3 complexes an example of bimetallic activation in homogeneous catalysis
ChemInform, 1994Co-Authors: Jeanfrancois Carpentier, Veronique Dufaud, Jeanmarie Basset, Andre Mortreux, Francis Petit, Jean ThivollecazatAbstract:Abstract The effect of the coordination of a tricarbonylchromium moiety to the aromatic ring of aryl chlorides in the activation toward oxidative addition of the CCl bond to zerovalent palladium complexes is described. It presents an overview of catalytic reactions and fundamental investigations with the aim to rationalizing the role of the Cr(CO) 3 moiety on some of the elementary steps of these reactions. This topic is divided according to the nature of the catalytic reactions involving the tricarbonyl (Chloroarene) chromium complexes. Firstly, the results obtained during the cross-coupling reaction with nucleophilic reagents (copper acetylides, organostannanes) and the catalytic Heck olefination reaction are presented. Then, several carbonylation processes, such as hydrocarbonylation into aldehydes, mono- and double carbonylation into amides and α-oxo-amides, and finally alkoxycarbonylation into esters, are discussed. Particular attention is given to the catalytic and stoichiometric aspects of this last reaction.