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Filtering by: Creator Cho, Y. K. Remove constraint Creator: Cho, Y. K. Academic Affiliation Chemistry Remove constraint Academic Affiliation: Chemistry Degree Level Doctoral Remove constraint Degree Level: Doctoral

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  • Expediting the Generation and Analysis of Amorphous Oxide Computational Models: Modeling Complex Systems Swiftly

    Creator:
    Buchanan, Jacob C.
    Abstract:
    In this dissertation, the process of computational modeling of amorphous oxide materials is studied. Amorphous oxides have random atomic arrangements with no long-range structural order which makes it difficult to study structure-property relationships. Despite the difficulties, amorphous oxides have great uses as semiconductors and dielectrics in thin-film transistors. The ability...
    Resource Type:
    Dissertation
    Full Text:
    . J.; Cho, Y. S. Origin of Abnormal Dielectric Behavior and Chemical States in Amorphous CaCu3Ti4O12

  • Total Synthesis of Cephalotaxus Alkaloids and Synthetic Studies toward Bazzanin K

    Creator:
    Ju, Xuan
    Abstract:
    Dearomatization reactions exist broadly in biosynthesis and chemical synthesis. The highly functionalized atoms of arenes can be masked by it aromaticity, and upon dearomatization, those reactive atoms can be readily applied to bond formation and further manipulation. The total synthesis of (–)-cephalotaxine and (–)- homoharringtonine is described via an oxidative...
    Resource Type:
    Dissertation
    Full Text:
    Alkaloids and Synthetic Studies toward Bazzanin K Abstract approved

  • An approach toward the synthesis of euonyminol and cathedulin K- 19

    Creator:
    Shin, Hyunik
    Abstract:
    A synthetic approach toward the two major fragments of cathedulin K-19, euonyminol (4) and dimethyl cathate (69), was investigated. Synthesis of dimethyl cathate was accomplished in 3 steps starting from 73. Efforts directed towards the synthesis of euonyminol, a highly oxygenated dihydroagarofuran sesquiterpene, was advanced to a stage in which...
    Resource Type:
    Dissertation
    Full Text:
    hence at C-9' of K-19, possess the (S) configuration.22 ROTBS O R = CHO R = C=CH (i) R = TBS R = H

  • Galvanostatic control of ion selective electrodes with the solvent polymeric membrane

    Creator:
    Perera, Hasini R.
    Abstract:
    Detection technique that proposed utilizing electrochemically controlled, reversible ion extraction into polymeric membrane in an alternating galvanostatic/ potentiostatic mode was introduced. This method is studied in detail to comprehend the advantages of the novel sensor (pulstrode) compared to the potentiometric ion selective electrode (ISE), studies included possible applications and limitations....
    Resource Type:
    Dissertation
    Full Text:
    : Alexey Y. Shvarev Detection technique that proposed utilizing electrochemically controlled, reversible

  • Insights and Patterns from Quantitative and Statistical Analyses of Chemical Systems

    Creator:
    Grove, Markas Albert
    Abstract:
    The work presented here is the culmination of efforts in describing complex chemical systems with statistical methods, thereby providing relatively simple quantitative models and easily comprehensible qualitative insights. The following investigations have various goals, such as development of new methods, fundamental understanding, molecular control of chemical species, and advancement of...
    Resource Type:
    Dissertation
    Full Text:
    , C. K.; Reynolds, T. R.; Cheong, P. H.-Y.; Keszler, D. A. Hydrolysis and Condensation of N-BuSnCl3

  • Computational Rationalizations of Mechanism and Stereocontrol in Small-Molecule Lewis Base Organocatalysis

    Creator:
    McCauley-Walden, Daniel W.
    Abstract:
    My work has focused on investigating synthetic organic reactions using applied computational methods. Non-covalent interactions are critical to catalysis, mechanism, and stereoselectivity, with the most prominent interaction for isothioureas being the S···O contact between the catalyst sulfur atom and the oxygen of the acyl group. A comprehensive joint experimental and...
    Resource Type:
    Dissertation
    Full Text:
    .-Y.; Legault, C. Y.; Um, J. M.; Çelebi-Ölçüm, N.; Houk, K. N. Chem. Rev. 2011, 111, 5042– 5137

  • Computational Investigation and Prediction of Mechanisms and Stereocontrol in Complex Organic Reactions

    Creator:
    Pattawong, Ommidala
    Abstract:
    Complex organic transformations, such as the addition of pyrrole to ketene using planar chiral organocatalyst (*PPY), the four-component anhydride- Manniach reactions, and the site-selective desymmetrization of meso-1,2-diol, are remarkable synthetic reactions that provide high yield and high selectivity. However, the exact mechanism and origins of stereocontrol for theses synthetic organic...
    Resource Type:
    Dissertation
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    Pol Pharm. 2006, 63, 333. (b) Chen, X.; Yamamoto, C.; Okamoto, Y. Pure Appl. Chem. 2007, 79, 1561

  • Conformationally chiral diphenylethers and the enantioselective Ullmann etherification

    Creator:
    Salih, M. Quamar
    Abstract:
    Since the discovery of molecular chirality in 1848, this notion has had a substantial impact on medicine, biology, and chemistry. Extensive effort has been directed towards the construction of chiral molecules that contain sp³ hybridized stereogenic centers. In contrast, less effort has been dedicated to molecules that are chiral by...
    Resource Type:
    Dissertation
    Full Text:
    !diphenylethers! ! ! O W X Y Z O X W ZY k k=slow when; (W ≠ X, Y ≠ Z) (Y, W ≥ tBu)1.10 1.11 O 1.12 O

  • Total Synthesis of Goniomitine : Development of Aminal and α-Amino Radicals in the Synthesis of Nitrogen-Rich Natural Products

    Creator:
    Vellucci, Jessica K.
    Abstract:
    Aminal radical intermediates were generated by the method of radical translocation and reacted in C-C bond forming reactions with electronically deficient alkenes (Schiedler et al. Org. Lett. 2012, 14, 6092). Aminal radical intermediates can participate in inter- and intra-molecular reactions using both Bu3SnH and (TMS)₃SiH as hydride donors. Carbon–carbon bonds...
    Resource Type:
    Dissertation
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    THE DISSERTATION OF Jessica K. Vellucci for the degree of Doctor of Philosophy in Chemistry

  • Neutral lipid metabolism in the fat body of the larva of the fleshfly, Sarcophaga bullata

    Creator:
    Sun, Grace Y.
    Abstract:
    The purpose of this study was to characterize the neutral lipids of the fat body of the larva of the fleshfly Sarcophaga bullata and to examine the means by which these lipids are synthesized. The weight of the larva, the fat body as well as its lipid content were examined...
    Resource Type:
    Dissertation
    Full Text:
    gh t of f at b od y an d to ta l lip id m g /la rv a 320 280 240 200 40