Thesis (M.Phil.)--Chinese University of Hong Kong. / Bibliography: leaves 40-43.

Thesis. 1977. Ph.D.--Massachusetts Institute of Technology. Dept. of Chemistry. / M̲i̲c̲ṟo̲f̲i̲c̲ẖe̲ c̲o̲p̲y̲ a̲v̲a̲i̲ḻa̲ḇḻe̲ i̲ṉ A̲ṟc̲ẖi̲v̲e̲s̲ a̲ṉḏ S̲c̲i̲e̲ṉc̲e̲. / Includes bibliographical references. / Ph.D.

Vita. / Digitized by Kansas Correctional Industries

by Lou Wencheng. / Thesis (Ph.D.)--Chinese University of Hong Kong, 1997. / Includes bibliographical references. / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Mode of access: World Wide Web.

2,3,9,10-Tetrakis(trimethylsilyl)pentacene (169) and a series of its derivatives were synthesized. In addition, their structures, physical properties and reactions were fully studied. Longer substituted heptacenequinone 219 was synthesized and used to synthesize the heptacene derivative. / Chapter 2 concerns the aim of our research work and strategy. Soluble 2,3,9,10-tetrakis(trimethylsilyl)pentacene (169) and its deriva- tives 171-182, bulky o-carboranyl substituted pentacene derivative 190 and 6-chloro-2,3,9,10-tetrakis(trimethylsilyl)pentacene (192 ) were successfully synthesized. In addition, Diels-Alder reactions of 2,3,9,10- tetrakis(trimethylsilyl)pentacene (169) and 6-chloro-2,3,9,10-tetrakis- (trimethylsilyl)pentacene (192) with different dienophiles were carried out. Sterically hindered and unreactive 6-chloro-2,3,9,10-tetrakis(trimethylsilyl)pentacene (192) underwent coupling reaction with Grignard reagent in the presence of a nickel complex affording coupling product 208 and pentacene dimer 209 as a Wurtz-like coupled product. In addition, 2,3,11,12-tetrakis(trimethylsilyl)-7,16-bis(trimethylsilylethynyl)heptacene (220) was found to dimerize very readily with a head-to-tail structure confirmed by an X-ray diffraction study. / Chapter 4 is the experimental section. / In Chapter 1, a brief introduction of properties, applications, syntheses and reactions of pentacene is given. In addition, the chemistry of heptacene is also presented. / In Chapter 3, a brief conclusion is provided. / Wang, Yuman. / "September 2007." / Source: Dissertation Abstracts International, Volume: 69-08, Section: B, page: 4765. / Thesis (Ph.D.)--Chinese University of Hong Kong, 2007. / Includes bibliographical references (p. 128-147). / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Electronic reproduction. [Ann Arbor, MI] : ProQuest Information and Learning, [200-] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Abstracts in English and Chinese. / School code: 1307.

No description available.

Quinine is an alkaloid natural product isolated from the bark of the cinchona tree. It has long served as a synthetic target due to its antimalarial properties. The total synthesis of quinine can be envisioned employing a recently developed catalytic enone cycloallylation methodology. This new process merges phosphine organocatalysis and transition metal catalysis. The pursuit of quinine details the first application of this novel method in organic synthesis. Herein, phosphine-catalyzed transformations of [alpha, beta]-unsaturated compounds as well as a historical overview of the alkaloid target are thoroughly reviewed. The following chapters discuss both racemic and asymmetric approaches toward quinine, including the completion of a formal synthesis. Not only has the cycloallylation proved successful in this synthetic application, but this body of work has seen the development of many highly selective transformations. / text

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published_or_final_version / Chemistry / Master / Master of Philosophy

published_or_final_version / Chemistry / Master / Master of Philosophy