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 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 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 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 Preparative Chemistry Using Supported Reagents written by Pierre Laszlo and published by . This book was released on 1987 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt: Preparative Chemistry Using Supported Reagents ...

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 New Polymer Supported Reagents written by Kwok-Wai Matthew Choi and published by . 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 The Combinatorial Index written by Barry A. Bunin and published by Elsevier. This book was released on 1998-04-15 with total page 341 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the explosion of combinatorial solid-phase methods, access to information has become one of the main barriers facing a synthetic chemist who is contemplating a combinatorial approach to a medicinal chemistry problem. The Combinatorial Index is an answer to that problem. This compendium of methods from the primary literature provides quick and convenient access to reliable synthetic transformations as well as information on linkers and analytical methods. Each synthetic procedure is preceded by a section entitled"Points of Interest,"which highlights the strengths and weaknesses of the various studies. The index also covers the use of solution-based synthesis for the generation of molecular diversity. - Organized for rapid retrieval of published information on classes of synthetic transformations, linkers, and analytical methods - Serves as a laboratory manual for bench chemists - Includes a chapter on linkers to assist in choice of linking strategy - Discusses strengths and limitations of the various methods - Contains a structural index showing functional group transformations in solid-phase synthesis

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 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 Studies on Polymer supported Reagents written by J. O. E. Otaigbe and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hypervalent Iodine in Organic Synthesis written by A. Varvoglis and published by Academic Press. This book was released on 1996-11-14 with total page 245 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the fascinating chemistry of the many kinds of organic compounds of hypervalent iodine. Each chapter deals with a particular iodine compound or families of compounds which have been used as reagents in a plethora of useful transformations. These include assorted oxidation, such as with the precious Dess-Martin reagent as well as with a wide range of further reactions. Prominent features of hypervalent iodine reagents derived from iodobenzene are: ready availability, operational simplicity, mild reaction conditions, and high efficiency. They are environmentally safe and can be recycled. New species may be easily prepared by introducing substituents in the benzene ring or changing the ligand attached to iodine. Their combination with other reagents broadens considerably their synthetic potential. Today, no synthetic chemist can afford to ignore the valuable hypervalentiodine reagents. - Features up-to-date coverage of a wide range of topics - Includes many tables featuring a diversity of reactivity, and a comprehensive index - Acts as a comprehensive, up-to-date reference on all aspects of hypervalent iodine chemistry - Contains a section on unusual efficiency of hypervalent iodine reactions

Download or read book Biphasic Chemistry and The Solvent Case written by Jean-Philippe Goddard and published by John Wiley & Sons. This book was released on 2020-01-09 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biphasic Chemistry and The Solvent Case examines recent improvements in reaction conditions, in order to affirm the role of chemistry in the sustainable field. This book shows that those who work within the chemistry industry support limits for the use of toxic or flammable solvents, since it reduces the purifications to simple filtrations. Thanks to commercial scavengers, solid phase syntheses are now available to all. Fluorine biphasic catalysis enables extremely efficient catalyst recycling and has a high applicability potential at the industrial level. This book also reviews the many studies that have shown that water is a solvent of choice for most synthetic reactions. Particular traits can be obtained and the effects on thermodynamics make it possible to operate at lower temperatures, thereby achieving energy savings. Finally the great diversity of application of the reactions without solvents is illustrated.

Download or read book Tellurium in Organic Synthesis written by Nicola Petragnani and published by Elsevier. This book was released on 2010-07-07 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: The increasing number of publications that use tellurium clearly demonstrates the important role of tellurium compounds as unique and powerful tools in a broad range of organic chemical manipulations, often characterized by their selective behavior. Tellurium in Organic Synthesis provides an overview of the principal aspects of organic tellurium chemistry. Many chapters have been enriched and updated in this second edition. New chapters include overviews of toxicology and pharmacology and a review on the preparation and reactivity of several tellurium heterocycles. The first part of the book focuses on the preparation of selected inorganic tellurium compounds and on the main classes of organotellurium compounds. The second part, and main interest of the book, details the use of these inorganic and organic compounds as reagents to perform specific organic manipulations and synthesis. Reactions covered include reduction, formation and reaction of anionic species, deprotection, tellurium cyclizations, formation of alkenes, use of vinyllic tellurides, free radical chemistry, transmetallations, and removal of tellurium. - Overview of inorganic and organic tellurium chemistry - Synthetic applications of tellurium compounds - All topics accompanied by detailed experimental procedures

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 Superbases for Organic Synthesis written by Tsutomu Ishikawa and published by John Wiley & Sons. This book was released on 2009-01-26 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Guanidines, amidines and phosphazenes have been attracting attention in organic synthesis due to their potential functionality resulting from their extremely strong basicity. They are also promising catalysts because of their potential for easy molecular modification, possible recyclability, and reduced or zero toxicity. Importantly, these molecules can be derived as natural products – valuable as scientists move towards “sustainable chemistry”, where reagents and catalysts are derived from biomaterial sources. Superbases for Organic Synthesis is an essential guide to these important molecules for preparative organic synthesis. Topics covered include the following aspects: an introduction to organosuperbases physicochemical properties of organic superbases amidines and guanidines in organic synthesis phosphazene: preparation, reaction and catalytic role polymer-supported organosuperbases application of organosuperbases to total synthesis related organocatalysts: proton sponges and urea derivatives amidines and guanidines in natural products and medicines Superbases for Organic Synthesis is a comprehensive, authoritative and up-to-date guide to these important reagents for organic chemists, drug discovery researchers and those interested in the chemistry of natural products.