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 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 Polymers as Aids in Organic Chemistry written by N.K Mather and published by Elsevier. This book was released on 2012-12-02 with total page 271 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymers as Aids in Organic Chemistry covers the broad classifications and application of polymers in organic chemistry. This book is organized into 15 chapters that focus on the transformation of polymers and their role in other reagents that must be easily separated from their final product. After a brief introduction to polymer chemistry, the book presents a tabulation of the various types of polymers that have been used and the methods for their characterization. It then discusses the use of polymers as supports in peptide, oligonucleotide, and oligosaccharide chemistry; in peptide sequencing; in monofunctionalized difunctional compounds preparation, as aids in asymmetric syntheses; and as trapping agents in the determination of reaction intermediates. The subsequent chapters describe the use of polymers as catalysts, with particular emphasis on transition metals immobilized in the polymer matrix and used as catalysts. The concluding chapters examine polymer-immobilized compounds, enzymes, and whole cells that have been used to carry out a large number of reaction, most of which impinge on the area of organic chemistry. Polymer scientists and researchers and organic chemists will find this book invaluable.

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 304 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 Chemical Reactions written by P. Hodge and published by iSmithers Rapra Publishing. This book was released on 1991 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymer supported chemical reactions may include those using supported substrates, reagents and catalysts, and this report describes all three types. In all cases the most frequent reason for the use of a polymeric support will be the ease of separation of the supported and the low molecular c099 species. An additional indexed section containing several hundred abstracts from the Rapra Polymer Library database provides useful references for further reading.

Download or read book Polymer supported Reagents and Catalysts written by Patrick H. Toy and published by . This book was released on 2005 with total page 180 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 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 Amine Functionalized Polymeric Catalysts and Reagents written by Jinni Lu and published by Open Dissertation Press. This book was released on 2017-01-26 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Amine Functionalized Polymeric Catalysts and Reagents" by Jinni, Lu, 陆今妮, 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: Polymer-supported reagents and catalysts, which allow for simple product separation and easy recycling, have been widely studied in the context of organic synthesis. The past decade has witnessed a number of new variations of polymeric materials, and among the most frequently immobilized functionalities are amines that possess versatile synthetic utilities. Polymers with new structures and improved properties for use in synthesis have been continuously developed since the support may impact the chemical reactions in which they are used in various ways. A new heterogeneous polystyrene-based amine, rasta resin-DMAP, has been synthesized and used in addition reactions of carbon dioxide to epoxides to afford cyclic carbonate products. This new material was found to be a more efficient catalyst than divinylbenzene cross-linked polystyrene supported DMAP, and was readily recycled without significant loss of catalytic activity. Compared to polymers bearing a single functionality, polymers possessing multiple different functional groups attached to a single polymer backbone would have greater potential utility, especially in reactions requiring multiple catalysts or reagents. As an example of this concept, a bifunctional polystyrene bearing both DMAP and piperazine groups has been prepared and applied as an organocatalyst for decarboxylative Doebner-Knoevenagel reactions of arylaldehydes and mono-ethyl malonate to produce (E)-,-unsaturated esters in high yields. Additionally, both non-cross-linked and cross-linked bifunctional polystyrenes featuring amine and thiourea groups have been developed, and their catalytic performance were evaluated in reactions of nitroalkenes with either nitroalkanes or sulfur ylides. Both polymers proved to be efficient catalysts in these reactions and the insoluble polymer demonstrated high recyclability. Control experiments using monofunctional polymers indicated that both catalytic groups of these bifunctional polymers are essential and they could work cooperatively to achieve efficient catalysis. Finally, a second generation bifunctional phosphine-amine polymer, rasta resin-PPh3-NBniPr2, was prepared and examined in tandem Wittig-reductive aldol reactions. In these reaction cascades, the phosphine oxide groups generated from the Wittig reaction served as the catalyst for the reductive aldol reaction, and moderate yields of structurally diverse -hydroxy ketones could be obtained from one-pot processes involving 5 sequential reactions. DOI: 10.5353/th_b4775252 Subjects: Amines Polymers Catalysts Supported reagents

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 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 Polymeric Chiral Catalyst Design and Chiral Polymer Synthesis written by Shinichi Itsuno and published by John Wiley & Sons. This book was released on 2011-06-28 with total page 674 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews chiral polymer synthesis and its application to asymmetric catalysis. It features the design and use of polymer-immobilized catalysts and methods for their design and synthesis. Chapters cover peptide-catalyzed and enantioselective synthesis, optically-active polymers, and continuous flow processes. It collects recent advances in an important field of polymer and organic chemistry, with leading researchers explaining applications in academic and industry R & D.

Download or read book Catalysis by Polymers written by E. A. Bekturov and published by John Wiley & Sons. This book was released on 2008-09-26 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Polymer Supported Organic Catalysts written by Narendra Chauhan and published by CRC Press. This book was released on 2024-07-26 with total page 247 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymer-supported organic catalysts are largely insoluble in most reaction solvents, which allows for easy recovery and recycling of the catalysts. They are generally stable, readily available, and environmental friendly, so they have attracted the interest of many synthetic chemists in the industrial and academic fields. In this book, different types of polymer-supported catalysts based on peptides, polystyrene, polyethers, poly(acrylic acid), poly(ethylene imine), poly(2-oxazoline), poly(isobutylene), poly(norbornene), etc., as well as metals are included with their synthetic organic synthesis applications. It is believed that this work will be of interest to organic chemists, material scientists, chemical engineers, polymer scientists and technologists.

Download or read book Polymer Supported Catalysts and Reagents in Synthetic Organic Chemistry written by Kim D. Janda and published by . This book was released on 2002 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Synthesis of Polymer supported Reducing Reagents and the Study of Their Catalytic Properties written by Hsueh-Chi Lee and published by . This book was released on 1979 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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: