Browsing Rice University Electronic Theses and Dissertations by Title
Now showing items 6893-6912 of 8502
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SYNTHETIC STUDIES ON THE SAFRAMYCINS A, B AND S: A TOTAL SYNTHESIS OF SAFRAMYCIN B
(1985)The Saframycins are naturally occurring antibiotics with an interesting bisquinone structure. The first and only synthesis of saframycin B is described herein. The interesting aspects of this synthesis are the convergent ... -
Synthetic studies toward an advanced intermediate of Fredericamycin A and the development and application of a novel palladium(0)-mediated spiroarylation
(1991)An advanced intermediate 2 for the synthesis of antitumor antibiotic ($\pm$)-Fredericamycin $A$, 1, has been prepared. The synthetic route features a novel palladium(0)-mediated intramolecular spiroarylation of 3. This ... -
Synthetic studies toward the total synthesis of (+)-anthramycin total syntheses of (+)-neothramycins A and B
(1990)Through the serendipitous discovery of a palladium catalyzed conversion of ethylthiol esters to their corresponding aldehydes, the pyrrolo (1,4) benzodiazepine systems found in (+)-anthramycin 1a* and (+)-neothramycins A ... -
Synthetic studies towards the luzopeptins: New amino acid synthons through the aza-Achmatowicz reaction
(1992)A new method for the enantioselective synthesis of unusual amino acids has been developed. The chemoenzymatic aza-Achmatowicz rearrangement of appropriate furylglycine derivatives provided nitrogenous synthons that were ... -
Synthetic studies towards the total synthesis of discorhabdin C
(1994)Two synthetic approaches towards the total synthesis of discorhabdin C (3) are described. The general strategy for construction of azacarbocyclic spiro dienone system is to employ an intramolecular para-phenolic alkylation ... -
Synthetic studies towards the total synthesis of renieramycin A (Antibiotics)
(1988)Formation of the skeleton of renieramycin A was achieved through sequential condensations of piperazinedione and substituted benzaldehydes. One of the key reactions of this synthesis, oxidation of benzylic position, produced ... -
Synthetic studies towards the total synthesis of the saframycins
(1988)A key improvement to the original saframycin B synthesis involves efficient sequential piperazinedione condensations to yield a basic saframycin skeleton from which all congeners might be made. Approaches toward the total ... -
Synthetic, structural and bonding studies of main group-transition metal carbonyl clusters
(1996)Structural studies on solvated adducts of bismuth (III) chloride have demonstrated the ability of the main group element to form multiple bonding contacts, giving "hypervalent" complexes. Similar interactions are observed ... -
Synthetic, structural and thermal decomposition studies of heterobimetallic bismuth-based coordination complexes
(2004)The reaction between triphenyl bismuth and salicylic acid in refluxing toluene proceeds via an acid hydrolysis pathway to produce a yellow complex analyzing as bismuth (III) salicylate---[Bi(Hsal)3]n---in quantitative ... -
System identification for robust control
(1998)In the design of a robust control system, one needs a nominal model together with a quantitative bound on the uncertainty that results from under-modeling and disturbances. In this thesis we do not intentionally seek a ... -
System identification of dynamic structural systems using continuous-time domain methods
(1994)Structural system identification is the process of deducing the properties of a structural system from its measured response to ambient vibration by fitting a mathematical model. The objectives of this study are to: (1) ... -
"Tactic" as a subverse act to the proper or "institutional"
(2000)The thesis is the exploration of the urban vernacular and the "tactical" practices that redefine and reappropriate the "strategic", "proper", or institutional. The concern of the thesis lies in the "fringe", or "marginalized" ... -
Tailoring traditional optimizations for runtime compilation
(2007)Runtime compilation, due to its online nature, presents unique challenges and opportunities to compiler designers. Since compilation occurs during program execution, a just-in-time compiler (JIT) must be judicious in ... -
Tailoring vertically-aligned carbon nanotube growth for poly(dimethylsiloxane)-infiltrated nanocomposites
(2010)This thesis discusses the viability of the polymer infiltration nanocomposite preparation technique for aligned carbon nanotubes (A-CNTs) as produced by two methods: pre-deposited catalyst chemical vapor deposition (CVD), ... -
Tailoring vessel morphology in vivo
(2012)Tissue engineering is a rapidly growing field which seeks to provide alternatives to organ transplantation in order to address the increasing need for transplantable tissues. One huge hurdle in this effort is the provision ... -
Tales all tolled and keys to dreamland. Reiteration, recirculation, and redefinition in our wholemole millwheeling vicociclometer: Funn at "Finnegans Wake"
(1993)Inter-textual relationships between James Joyce's works have long-since been noted, but the monographic studies that illuminate his works from different positions and theoretical bases tend toward specificity. The challenge ... -
Talk of times past: On the interaction of cognitive systems in conversation
(1991)This study considers a corpus of conversational data from a cognitive perspective. The corpus is comprised of a set of dialogues involving a man interviewing his parents about memories of the Oklahoma frontier. The study ... -
TAMILS IN MALAYSIA: PROBLEMS IN SOCIO-ECONOMIC DEVELOPMENT FOR AN IMMIGRANT MINORITY GROUP
(1983)Malaysian Tamils are in an unenviable position for socio-economic advancement in this relatively prosperous southeast Asian peninsula. Locked into a more or less permanent minority representing only about ten percent of ... -
Target types and the efficacy of economic sanctions
(1999)This study of economic sanctions examines the contribution of the target country to sanction outcomes. The theoretical foundation of this research is predicated on the role that target country political attributes play in ...
