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 10 of 10 for “"epoxide ring-opening"”.
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The Endocyclic Restriction Test: Mechanistic Investigations of Sulfur and Oxygen Transfer Reactions
… is provided. Subsequent decarboxylation and epoxide ring-opening are proposed to rationalize the furan product obtained from the reaction.
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Synthesis and cytotoxity of oxysterols:studies on the A,B ring polyoxygenated sterols
… groups and a desired configuration on the A, B ring are required for a potent cytotoxicity of an OS, after syntheses and tests of a number of 7-HC's analogues against cancer cell lines. Then polyoxygenation of cholesterol A, B rings was explored. A preparative method for the synthesis of four …
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Towards the Total Synthesis of Spirastrellolide E: Investigations into Advanced Southern Hemisphere Fragments
… union, involving a cross metathesis/epoxidation/epoxide ring opening cascade, and describes the synthesis of more than 500 mg of a revised southern hemisphere fragment. In addition, the mechanism of the key directed gold catalyzed spiroketalization is discussed in detail. A stereochemical …
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Development and application of transition metal-catalyzed cross-coupling reactions
… the use of cobalt-catalyzed enantioselective epoxide ring-opening reaction.
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The application of organocatalytic Asymmetric Epoxidation
… 1 under aqueous conditions. The acid-catalysed epoxide ring-opening of epoxide 4 afforded trans-diol 3 in high yield.
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Continuous-flow study and scale-up of conventionally difficult chemical processes
… systems provide valuable tools for exploring, studying, and optimizing organic syntheses. The small scales and fast transport rates allow for faster experiments and lower amounts of chemicals to be used, reducing costs and increasing safety. Additionally, continuous flow processes allow …
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Force-induced mechanochemical reactions in polymeric systems
… in each domain of segmented polyurethane during uniaxial tensile loading. The SP mechanophore was also used to investigate mechanical forces in crosslinked poly(methyl methacrylate) during swelling with common organic solvents. The SP was incorporated as a crosslinker and a correlation was …
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Development of a radical Ti(III)-mediated cyclization cascade to synthesize trans-decalones from epoxynitriles
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-11 without embargo terms
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Synthesis of Sustainable Antibacterial Materials by Surface Functionalisation of NZ Flax (Phormium tenax) Fibres and Hemp (Cannabis sativa) Hurd
… strategy proceeded through a SN2 O-epoxide ring opening, adding twenty various amines. Benzaldehyde and phthalic anhydride were used as protecting agents (producing two series: BDs 81-87 and PDs 114-133, respectively). In total, 27 chitosan derived compounds were synthesised and …
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Beiträge zur Synthese von Modellsystemen des heterobicyclischen Grundgerüstes der Saragossasäuren/Squalestatine sowie methodische Untersuchungen zur chemoselektiven mono-Debenzylierung von N,N-Dibenzylaminen und katalytischen enantioselektiven Ringöffnung von meso-Epoxiden
… Diese Katalysatoren wurden für die asymmetrische Ringöffnung verschiedener meso-Epoxide mit 4-Methoxyphenol genutzt und lieferten die Öffnungsprodukte in guten Ausbeuten und Enantiomerenüberschüssen (ee: 80 - 90 %).