Download or read book Development of New Polymer Supported Reagents written by Kwok-wai Choi (Matthew) and published by . This book was released on 2003 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of New Polymer Supported Reagents written by Kwok-Wai Matthew Choi and published by Open Dissertation Press. This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Development of New Polymer Supported Reagents" by Kwok-wai, Matthew, Choi, 蔡國偉, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled DEVELOPMENT OF NEW POLYMER SUPPORTED REAGENTS Submitted by Choi Kwok Wai Matthew for the degree of Master of Philosophy at The Universiry of Hong Kong in December 2003 The use of polymer-supported reagents has emerged as a powerful technique in organic synthesis in what is known as polymer-assisted organic synthesis. The inherent advantages of attaching reagents to insoluble supports lie in the ease of product purification, since the supports can be filtered and also because a given reaction can be driven to completion through the convenient use of excess of such reagents. Soluble polymers are alternative supports to insoluble resins for reagent delivery and this are becoming widely used. These reagents may be used to either selectively remove impurities from synthetic products or to deliver reagents to dissolved synthesis substrates A series of new polymer-supported reagents based on both non-cross- TM linked and cross-linked (JandaJel ) polystyrene were prepared and the utility of these polymers was demonstracted by their use in organic synthesis. In this thesis, the development of two new soluble polystyrene-based sulfoxide reagents for Swern oxidation reactions are introduced. i Secondly, a simplified synthesis of 4-styryldiphenylphosphine is described and used this monomer to prepare non-cross-linked polymer-supported triphenylphosphine using a homogeneous polymerization process. It is noteworthy that the 4-styryldiphenylphosphine monomer can be incorporated into the polymers at predictable levels, depending upon the ratio of monomers used in the polymerization reaction. The utility of this polymer was demonstrated by its use in Mitsunobu reactions. Thirdly, a straightforward synthesis of trityl alcohols in which one of the aryl rings is substituted with a vinyl group was presented. These compounds were used to incorporate trityl linker groups in polystyrene-based reagent supports. TM Both non-cross-linked and cross-linked (JandaJel ) polystyrene can be prepared with these monomers and these polymers are suitable as supports for solid-phase organic and peptide synthesis. Finally, a new cross-linked polystyrene-supported thioanisole reagent was reported. This reagent incorporates the flexible JandaJel cross-linker and can be treated with methyl trifluoromethanesulfonate to form the corresponding sulfonium salt. This salt in turn can be deprotonated to form a polymer-supported sulfur ylide that is able to react with carbonyl compounds to form epoxides. The thioanisole reagent can also be oxidized to form an insoluble sulfoxide reagent that is useful in Swern oxidation reactions. These reagents derived from the polymer-supported thioanisole can be recovered, regenerated, and reused. DOI: 10.5353/th_b2923052 Subjects: Polymers Supported reagents
Download or read book Development and Applications of Polymer supported Reagents and Ion Exchange Resins in Organic Synthesis and Combinatorial Chemistry written by Stephen J. Shuttleworth and published by . This book was released on 2002 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of New Polymer supported Reagents for Organic Synthesis Solvent Effects in Samarium Promoted Allylic Alcohol Cyclopropanation Reactions and Time Resolved Resonance Studies of the Photodeprotection of P hydroxyphenacyl Caged Phototrigger Compounds written by Tze-wai Kan (Jovi) and published by . This book was released on 2006 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of New Polymer supported Reagents for Organic Synthesis Solvent Effects in Samarium Promoted Allylic Alcohol Cyclopropanation Reactions and Time Resolved Resonance Studies of the Photodeprotection of P hydroxyphenacyl Caged Phototrigger Compounds written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Polymeric Materials in Organic Synthesis and Catalysis written by Michael R. Buchmeiser and published by Wiley-VCH. This book was released on 2003-09-29 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt: Publisher description
Download or read book Development of Polymers for Electroplating Waste Water Purification Polymer Supported Reagents for Organic Synthesis and Heterogeneous Catalysts for Aerobic Alcohol Oxidation Reactions written by Die Daisy Yang and published by Open Dissertation Press. This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Development of Polymers for Electroplating Waste Water Purification, Polymer-supported Reagents for Organic Synthesis and Heterogeneous Catalysts for Aerobic Alcohol Oxidation Reactions" by Die, Daisy, Yang, 楊蝶, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. DOI: 10.5353/th_b3984888 Subjects: Thiourea Polymers Supported reagents Catalysts Sewage - Purification - Heavy metals removal
Download or read book Development of Polymer bound and Homogeneous Reagents and Catalysts for Organic Synthesis written by Myun-Jung Jin and published by . This book was released on 1990 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Polymer supported Reactions in Organic Synthesis written by Philip Hodge and published by John Wiley & Sons. This book was released on 1980 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Supported Catalysts and Their Applications written by David C Sherrington and published by Royal Society of Chemistry. This book was released on 2007-10-31 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: The need to improve both the efficiency and environmental acceptability of industrial processes is driving the development of heterogeneous catalysts across the chemical industry, including commodity, specialty and fine chemicals and in pharmaceuticals and agrochemicals. Drawing on international research, Supported Catalysts and their Applications discusses aspects of the design, synthesis and application of solid supported reagents and catalysts, including supported reagents for multi-step organic synthesis; selectivity in oxidation catalysis; mesoporous molecular sieve catalysts; and the use of Zeolite Beta in organic reactions. In addition, the two discrete areas of heterogeneous catalysis (inorganic oxide materials and polymer-based catalysts) that were developing in parallel are now shown to be converging, which will be of great benefit to the whole field. Providing a snapshot of the state-of-the-art in this fast-moving field, this book will be welcomed by industrialists and researchers, particularly in the agrochemicals and pharmaceuticals industries.
Download or read book Development of a Multipolymer Reaction and Polyfunctional Polymeric Catalysts written by 鍾韻盈 and published by Open Dissertation Press. This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Development of a Multipolymer Reaction and Polyfunctional Polymeric Catalysts" by 鍾韻盈, Wan-ying, Cecilia, Chung, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled DEVELOPMENT OF A MULTIPOLYMER REACTION AND POLYFUNCTIONAL POLYMERIC CATALYSTS Submitted by Chung Wan Ying Cecilia for the Degree of Doctor of Philosophy at The University of Hong Kong in March 2008 Polymer-supported reagents and catalysts have long been used in organic synthesis because they simplify product purification and can often be recycled. Simultaneously using two or more such polymeric reagents and catalysts are known as multipolymer reactions. A complementary extension of this concept is to use a single polymer that contains two or more different reagent and/or catalyst groups. We have developed several such polyfunctional polymeric reagents and catalysts. The scientific literature regarding multipolymer reactions and polyfunctional polymers in the context of organic synthesis was reviewed. The synthesis and application of both a monofunctional triflimide polymer and an analogous bifunctional triflimide/amine polymer were described. The monofunctional polymeric triflimide reagent was used together with an amine base to transform a series of phenols into the corresponding aryl triflates. However, the bifunctional triflimide/amine polymer was not effective in such aryl triflate synthesis. A multipolymer reaction system was presented for the selective and catalytic aerobic oxidation of primary benzylic alcohols to aldehydes. Polymer-supported 2,2'-bipyridine and 2,2,6,6-tetramethyl-piperidine-1-oxyl radical (TEMPO) were synthesized and used simultaneously as ligands for copper(II) to generate the catalytically active species required for the oxidation reactions. The recyclablility of these polymers was also examined. The synthesis of two polyfunctional polymers, one soluble and the other insoluble, were reported. Both 2,2'-bipyridine and TEMPO were attached to the same polymer backbone and these were successfully utilized in the same aerobic oxidation reactions previously performed in the multipolymer reaction system. DOI: 10.5353/th_b3970744 Subjects: Organic compounds - Synthesis Chemical reactions Polymers Catalysts
Download or read book Development of Polymers for Electroplating Waste Water Purification Polymer supported Reagents for Organic Synthesis and Heterogeneous Catalysts for Aerobic Alcohol Oxidation Reactions written by Die Yang (Daisy) and published by . This book was released on 2008 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Polymeric Materials in Organic Synthesis and Catalysis written by Michael R. Buchmeiser and published by John Wiley & Sons. This book was released on 2006-03-06 with total page 582 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first book to describe the synthesis and characterization of the materials used in polymer-supported synthesis. The authors cover not only the classical polymers and their use in homogeneous, heterogeneous and micellar catalysis, but also such new developments as "enzyme-labile linkers", illustrating how to simplify the purification process and avoid waste. The result is a wealth of useful information -- for beginners and experts alike - in one handy reference, removing the need for difficult and time-consuming research among the literature.
Download or read book Development of a Polymer Supported Reagent for Trost Lu Isomerization Reactions and Reagents for Mitsunobu Reactions written by Yunyi Michael Fu and published by . This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Polymeric Reagents and Catalysts written by Warren T. Ford and published by . This book was released on 1986 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Examines recent advances in the use of polymeric reagents and catalysts with a special emphasis on new compounds, synthetic methods, and industrial processes. Brings these advances to the attention of those who are involved in organic synthesis and desire a more thorough understanding of polymers and polymeric reagents. Contains comprehensive chapters devoted to polymeric oxidizing agents, Wittig reagents, and synthesis of cross-linked polymeric templates for chiral recognition. Presents opportunities for invention and use of many new polymeric reagents and catalysts.
Download or read book Polymer Supported Reagents Catalysts and Scavengers in Organic Synthesis written by Richard D. Caldwell and published by . This book was released on 2003 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of a Polymer supported Reagent for Trost Lu Isomerization Reactions and Reagents for Mitsunobu Reactions written by Yunyi Fu (Michael) and published by . This book was released on 2008 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
