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Filtering by: Creator Sorensen, Hilarie L. Remove constraint Creator: Sorensen, Hilarie L. Academic Affiliation Chemistry Remove constraint Academic Affiliation: Chemistry Decade 2000-2009 Remove constraint Decade: 2000-2009

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  • A Diels-Alder approach to biaryl synthesis

    Creator:
    Ashburn, Bradley O.
    Abstract:
    An expedient approach to the synthesis of a wide range of highly programmable biaryl templates has been accomplished. Utilizing the Diels-Alder [4+2] cycloaddition, a wide range of tri- and tetra-ortho-substituted biaryls have been synthesized in only three to four steps from commercially available materials. We have successfully synthesized entire classes...
    Resource Type:
    Dissertation
    Full Text:
    . Paul R. Blakemore, Prof. Kerry L. McPhail, and Prof. William W. Warren for their guidance. I want to

  • Synthesis of epothilones and epothilone analogues

    Creator:
    Sundermann, Kurt F.
    Abstract:
    A convergent synthesis of epothilone B that generates all seven of its asymmetric centers in a completely stereoselective fashion has been completed. Key reactions include an anti-Felkin aldol condensation to set the C6 and C7 stereochemistry, a directed α-hydroxylation to install the C15 (S)-hydroxyl substituent, and a Wittig condensation to...
    Resource Type:
    Dissertation
    Full Text:
    Epothilone B10 (11) NtS.OH Epothilone G1 (12), R = H Epothilorie G2 (13), R Me L/,SS0H Epothitone H1 (14

  • Expanding the scope of a Diels-Alder approach to biaryl synthesis

    Creator:
    Schwartz, Johanna Perkins
    Abstract:
    A Diels-Alder approach to biaryls (DAB) has been applied towards the synthesis of highly substituted, programmable biaryl templates. Tri- and tetra-ortho-substituted biaryls can be produced in just three to four steps from commercially available materials utilizing the Diels-Alder [4+2] cycloaddition. The methods described herein will illustrate the ability of mono...
    Resource Type:
    Dissertation
    Full Text:
    agencies and foundations: The National Institutes of Health, the National Science Foundation, the N. L

  • The role of iron-oxides in U(VI) adsorption and the kinetics of contaminant organic reduction

    Creator:
    Logue, Brian A.
    Abstract:
    Contaminant transport in ground water is an important environmental process that affects a host of natural systems. Transport of contaminants is affected by many processes, including aqueous complexation, adsorption, and redox reactions. One of the most important components of an aquifer that controls transport is iron-oxide. In this study, the...
    Resource Type:
    Dissertation
    Full Text:
    ) in an adsorption experiment with natural sands. 20 g/L sand sample BS-4, 0.01 M NaClO4, Pco2 = l0 atm

  • Synthesis of novel ambifunctional atropisomeric 2,2',6,6'-tetrasubstituted biphenyls and investigation of their properties and organocatalytic activity

    Creator:
    Sephton, Mark Alan
    Abstract:
    Ambifunctional axially chiral 2,2',6,6'-tetrasubstituted biphenyls containing nucleophilic (or basic) functional groups juxtaposed with hydrogen-bond donors were synthesized and their properties studied. Applications for the prepared biaryls as potential organocatalysts for enantioselective carbon-carbon bond forming reactions were examined. Processes investigated included: aldol, Michael, nitroaldol (Henry), and Baylis-Hillman reactions. The novel amidoamine...
    Resource Type:
    Dissertation
    Full Text:
    first present in the form of amino acids brought to Earth on meteorites. L-Alanine and L-isovaline

  • Development of fragmentation techniques in mass spectrometry for biological applications

    Creator:
    Ji, Hong
    Abstract:
    In this dissertation, I present the work of developing more efficient and economical techniques for fragmenting large bio-molecules, and ultimately making mass spectrometry a more powerful tool in proteomics, DNA sequencing, and other areas of biomolecular analysis. Aiming at lowering the installation and operating cost, and delivering electron capture dissociation...
    Resource Type:
    Dissertation