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Showing 1 to 20 of 221 for “"Alkene"”.
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Investigations into alkene hydration and alkene oxidation catalysis
… metal complexes were investigated as possible alkene hydration catalysts under a multitude of different reaction conditions. All attempts at performing this catalytic reaction failed to give any alcohol products. Catalytic screening experiments were conducted using a mixture of racemic-et,ph-P4 …
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Selenium redox-catalyzed alkene syn-difunctionalization
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-08-01
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Alkene hydrogenation on reduced nickel A-zeolite catalysts.
… be similar to those found by other workers for alkene hydrogenation over pure nickel metal. Reactions were first order in hydrogen and zero order in alkene at lower temperatures. However, the order with respect to alkene increased towards unity as temperature increased and led to a decrease in …
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Alkene oxidation by platinum (II) oxo/hydroxo complexes
… reactions, resembling Wacker chemistry, yield alkene oxidation products: acetaldehyde, acetone and ethyl-‐methyl ketone, respectively. Pt-ethyl alkyl complexes are yielded as the only Pt containing complexes. A proposed mechanism for these alkene oxidations is described. Pt-hydroxo complex 4 …
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Electrochemical Alkene Epoxidation Using Water as the Oxygen Source
Alkene epoxidation is a crucial chemical functionalization reaction that produces key chemical intermediates for the synthesis of various commercial end products. The current methods of producing epoxides are associated with a number of challenges, including the use of energy-intensive and …
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Multidentate phosphino-alkene ligands and their late transition metal complexes
… multidentate conformationally flexible phosphino-alkene ligands, called dbaPHOS (127) and monodbaPHOS (128), are described is this PhD thesis. The related phosphine sulphide ligands, namely dbaTHIOPHOS (137) and monodbaTHIOPHOS (149), have also been prepared. The coordination chemistry of the …
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Development of three-component alkene and 1,3-diene carbofunctionalization reactions
… demands, we have developed a three-component alkene carboamination reaction. This system offers access to complex amine products from simple starting materials and proceeds under mild reaction conditions. Critically, this transformation combines disconnected carbon, nitrogen, and alkene …
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An investigation into the alkene hydroformylation reaction using platinum complexes
… significant chemo- and regioselectivities in alkene hydroformylation. This thesis investigates the activity as well as selectivity of platinum complexes containing bidentate ligands in the hydroformylation reaction.
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Development of copper-catalyzed enantioselective alkene difunctionalization reactions via radical intermediates
… efficient oxytrifluoromethylation of unactivated alkenes based on a copper-catalyzed ligand-assisted difunctionalization strategy has been developed. This method provides access to a variety of classes of synthetically useful CF3-containing building blocks from simple starting materials. Chapter 2 …
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Neue organometallisch substituierte Alkine, Alkene und Metallacyclen - Anwendung der Multikern-NMR-Spektroskopie
Diese Dissertation berichtet über die Synthese neuer Mono- und Dialkinylstannane. Diese wurden mit gängigen Methoden (NMR, IR, MS, teils Röntgenstrukturanalyse) charakterisiert und ihre Anwendung in 1,1-Organoborierungsreaktionen wurde gezeigt. Die Alkinylstannane können in guten bis sehr guten …
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Oxocarbenium Ion and Alkene Metathesis Strategies for the Synthesis of Complex Cyclohexanes
… precursors. Chapter two describes reactions with alkene nucleophiles. In particular, the OCC on an alkene-mixed thioacetal precursor aimed at the cyclohexane core of the immunosuppressive agent FR65814, was examined. This study revealed that OCCs on non-cyclic oxocarbenium ions could deliver …
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Solvent and surface effects on alkene oxidation catalysis over transition metal incorporated zeolites
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-08-01
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Main Group Elements in Catalysis: Alkene/Alkyne Activation Using Organoaluminium(III)–Pyridyl Dimers
… of new cationic Al(III)-based catalysts for alkene/alkyne polymerisation containing two active centres, with the potential to act co-operatively in stereoselective assembly. The focus of this study was organoaluminium pyridyl dimers of the type [R2Al(2- py')]2 (R = Me, iBu; py'= substituted …
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Rhodium-Catalyzed Enantioselective Desymmetrizations of Oxabicyclic Alkenes and Alkene Difunctionalization via Nickel-Catalyzed Arylcyanation
… cycloisomerization reaction of oxabicyclic alkenes. Our work on developing the intramolecular asymmetric ring opening reaction led to the discovery of a novel epoxide synthesis. Specifically, when bridgehead substituted oxabicyclic alkenes with non-nucleophilic side chains are reacted with …
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Influence of solvation and microenvironment on alkene epoxidation with hydrogen peroxide within titanium silicates
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2026-08-01
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Isomerization-Locked Alkene Analogues of Xaa–Pro Dipeptides in the Proteins Collagen and Bora
… eliminating isomerization with a trans-locked alkene isostere destabilizes collagen-like peptides. Collagen is stabilized by electronic interactions, namely the n→π* interaction. Halo-alkene isosteres may be used to recapture these electronic interactions and stabilize a collagen-like peptide. …
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The effects of ancillary ligand properties on the reactions of rhodium diphosphine alkoxo alkene complexes
Rhodium diphosphine alkoxo alkene complexes were synthesized by the addition of unsaturated alcohols to rhodium diphosphine silylamido complexes at -78 °C. The alkoxo alkene complexes were characterized by NMR spectroscopy at 50 °C and allowed to react at either 35 °C or 70 °C. The reactions …
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Organometallic compounds related to alkene polymerization catalysts: Cationic nickel(II) alkyls and hafnium(III) dimers
ABSTRACT HAS BEEN ARCHIVED 10/29/96
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