Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 6 of 6 for “"beta-hydride elimination"”.
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Orientation and chemistry of alkoxides on copper(111)
… decompose at elevated temperatures by $\beta$-hydride elimination, desorbing as aldehydes. The influence of deuterium isotope labelling, selective fluorination, and chain length on this mechanism has been studied. Temperature Programmed Reaction (TPR) spectra for the reactions of …
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Examination of Dynamic Processes in Living Ziegler-Natta Polymerization and New Polypropylene Architectures through Bimolecular Control
… not only the expected alkenes from isomerization/beta-hydride elimination, but significant quantities of alkane. This is proposed to arise from competitive intramolecular abstraction of a hydrogen from the Cp* ligand. During decomposition, all species mentioned above disappeared in a first order …
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Nickel-catalyzed coupling reactions and synthetic studies toward ent-dioxepandehydrothyrsiferol via an epoxide-opening cascade
… a silyl triflate. Under appropriate conditions [beta]-hydride elimination could occur to provide an allylic alcohol product. The nickel(0) catalyst could be regenerated in the presence of a base. Ethylene and terminal alkenes are appropriate substrates for this transformation (eqs 2 and 3). …
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Palladium-catalyzed C-N and C-O cross-coupling reactions
… reaction of primary aliphatic alcohols bearing [beta]-hydrogen atoms can lead to undesired [beta]-hydride elimination pathways instead of the target reductive elimination from the [LPd(Ar)OAlk] intermediate, especially when using electron-rich aryl halides. Additionally, aryl chlorides have been …
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Improving synthetic efficiency through C—H activation
… intermediate that undergoes successive beta-hydride elimination to give the desired unsaturated carbonyl compounds, and that the acid additive is a key promoter of the reaction.
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Ligand design principles for perfecting stereoretention in Suzuki-Miyaura cross-coupling of unactivated CSP3 boronic acids
The strategy of building block-based, iterative synthesis has revolutionized the preparation of oligonucleotides and oligopeptides. However, small molecules possess greater structural diversity than these classes of macromolecules. The development of an iterative, building block-based synthetic …