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Showing 1 to 11 of 11 for “"ruthenium catalysts"”.
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Ruthenium catalysts for the synthesis of quinolines and enol esters
… was to investigate the scope and limitations of ruthenium Schiff base catalysts for two types of reactions. In a modification of the Friedlander reaction, 2-aminobenzylalcohol is oxidatively cyclized with ketones or aldehydes, affording quinolines. The key step in this method is a hydrogen …
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Studies toward Augmented Carbene/Alkyne Cascade Reactions and Ruthenium Catalysts for Propargylic Substition
… The second part discusses the synthesis of a ruthenium catalyst and its application for propargylic substitution. The third part describes an improvement of a Robinson annulation for the synthesis of aplykurodinone 1. Alkyne/cascade reactions are highly effective processes in organic …
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Development of O,N-bidentate ruthenium catalysts for isomerization and kinetic studies of ruthenium carbenes for C=C coupling reactions
… even natural products. During the last decade, ruthenium catalysts have provided new indispensable synthetic methods that cannot be promoted by other catalysts and applied in wide range of chemical reactions. This work deals with the development of O,N-bidentate ruthenium homogeneous catalysts …
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Activating Aldehyde C-H Bonds: Applications to Hydroacylation and Transfer Hydroformylation
… molecules. Rhodium complexes are promising catalysts for these reactions and they readily activate aldehyde C-H bonds to generate acyl-rhodiumIII-hydrides. Developing strategies to control the reactivity of these oxidative addition products enables developments in hydroacylation and …
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Interactions of hydrogen with alkali promoted Ru/SiO2 catalysts: a proton NMR study
… characterize alkali promoted Ru/SiO[subscript]2 catalysts. Initial work investigated the role of hydrogen spillover to the silica support on the characterization of the active metal sites via a hydrogen chemisorption technique. A strongly bound component of spilled over hydrogen was found in the …
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Selective hydrogenation of α,β[alpha,beta]-unsaturated aldehydes towards clean synthesis over noble metal catalysts in mass transfer efficient three phase reactors
… and commercial palladium, platinum and ruthenium catalysts was carried out in stirred tank reactors and cocurrent downflow reactors in order to study the kinetics and mass transfer characteristics and the selectivity towards the corresponding desired product, hydrocinnamaldehyde or …
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Computational Studies of Selected Ruthenium Catalysis Reactions.
… and characteristics of transition metal (i.e., ruthenium) catalysts, and to explore their mechanisms. The studied catalytic pathways are particularly relevant to catalytic hydroarylation of olefins. These processes involved the +2 to +3 oxidation of ruthenium and its effect on ruthenium-carbon …
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Rigid Ruthenium PCcarbeneP Complexes for Small Molecule Activation, Hydrogenation, and Dehydrogenation
… of fundamental importance to the development of catalysts for producing alternative fuels and other value-added products from abundant feedstocks. The capture and subsequent conversion of pollutant molecules like carbon dioxide and nitrous oxide can reduce their atmospheric concentrations and …
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Engineering novel tandem reactions using organometallic catalysts and metalloenzymes
… at mild conditions, and in air. Organometallic catalysts often require very different conditions, such as organic solvents, inert atmosphere, and high temperatures. Research interests over the last several years have grown in attempting to combine these two sub-disciplines for asymmetric …
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Spectroscopic Characterization of the Water-Oxidation Intermediates in the Ru-Based Catalysts for Artificial Photosynthesis
… as water splitting into hydrogen and oxygen. Ruthenium complexes are among few molecular-defined catalysts capable of water splitting. Insight into the mechanism of their action will help to design future robust and economically feasible catalysts for light-to-energy conversion. Mechanistic …