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Author : Mohammed Sharique
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (138 download)
Download or read book Design and Development of New Catalytic Carbon-carbon Bond Forming Reactions written by Mohammed Sharique and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Sumi Joseph
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (14 download)
Download or read book Design and Development of Novel Organo-catalytic Approaches for C-C Bond Forming Reactions written by Sumi Joseph and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Alex Levon Bagdasarian
Publisher :
ISBN 13 :
Total Pages : 334 pages
Book Rating : 4.:/5 (113 download)
Download or read book Main Group-Catalyzed Carbon to Carbon Bond-Forming Reactions of Dicoordinate Carbocations written by Alex Levon Bagdasarian and published by . This book was released on 2019 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation focuses on the development of catalytic Carbon to Carbon (C-C) bond forming reactions of dicoordinate carbocations. The unique reactivity described herein focuses on the use of ionizable groups and appropriate counter anions to facilitate productive reactions of high-energy cationic intermediates. The first chapter discusses the exploration of phenyl carbocations, generated from aryl fluorides under silylium-weakly coordinating anion (WCA) catalysis, in the context of hydrocarbon functionalization. Chapter two describes the discovery of C-H insertion and reductive Friedel-Crafts reactions of vinyl carbocations generated from vinyl triflates and silylium-WCA salts. Chapter three describes a novel approach to generating vinyl cations using Lithium Lewis acids. Interestingly, these vinyl carbocations are formed under basic conditions, with lithium hexamethyldisilazide (LiHMDS) as the Lewis acid precursor. Chapter four describes two new catalytic manifolds using urea-based organocatalysts. In one instance, the urea catalyst directly ionizes the vinyl triflate through a hydrogen-bonding interaction to promote intra molecular C-H insertion reactions. In another case, urea organocatalysts combined with LiHMDS, result in novel lithium-urea catalyst that promote Friedel-Crafts reactions of vinyl triflates. In summary, these studies have resulted in the development of new catalytic methods using main-group catalysis for the formation of C-C bonds.
Author : G. Pattenden
Publisher : Elsevier
ISBN 13 : 008091246X
Total Pages : 1209 pages
Book Rating : 4.0/5 (89 download)
Download or read book Carbon-Carbon ?-Bond Formation written by G. Pattenden and published by Elsevier. This book was released on 1992-09-08 with total page 1209 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume 3 covers carbon-to-carbon single bond forming reactions involving sp3, sp2 and sp carbon centers, but only those which do not involve additions to C-X &pgr;-bonds. The volume first compares and contrasts the alkylation reactions of all types of sp3 carbon nucleophiles and also covers vinyl and alkynyl carbanions. Following on from Volume 2, a separate section covers Friedel-Crafts alkylation reactions, which is complemented by discussions of polyene cyclizations and electrophilic transannular cyclizations in synthesis. Coupling reactions leading to &agr;-bond formation, and involving all types of combinations ofsp3, sp2 and sp carbon centers are next covered, including those reactions based on pinacol, acyloin and phenol oxidative coupling reactions, and also the Kolbe reaction. Rearrangement reactions, leading to carbon-to-carbon &agr;-bond formation, are often used in a clever manner in synthesis. The volume includes all those rearrangement reactions based on intermediate carbonium ions and carbanions, and also includes the benzil-benzilic acid and the Wolff rearrangements. The volume closes with coverage of carbonylation reactions, and the use of carbene insertion reactions into the C-H bond in synthesis.
Author : Rui Shang
Publisher : Springer
ISBN 13 : 9811031932
Total Pages : 225 pages
Book Rating : 4.8/5 (11 download)
Download or read book New Carbon–Carbon Coupling Reactions Based on Decarboxylation and Iron-Catalyzed C–H Activation written by Rui Shang and published by Springer. This book was released on 2016-12-09 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents the latest developments in new catalytic C–C bond formation methods using easily accessible carboxylate salts through catalytic decarboxylation with good atom economy, and employing the sustainable element iron as the catalyst to directly activate C–H bonds with high step efficiency. In this regard, it explores a mechanistic understanding of the newly discovered decarboxylative couplings and the catalytic reactivity of the iron catalyst with the help of density functional theory calculation. The thesis is divided into two parts, the first of which focuses on the development of a series of previously unexplored, inexpensive carboxylate salts as useful building blocks for the formation of various C–C bonds to access valuable chemicals. In turn, the second part is devoted to several new C–C bond formation methodologies using the most ubiquitous transition metal, iron, as a catalyst, and using the ubiquitous C–H bond as the coupling partner.
Author : Pradp Bgle
Publisher :
ISBN 13 : 9785891842199
Total Pages : 0 pages
Book Rating : 4.8/5 (421 download)
Download or read book Gold And Silver Co-Operative Catalysis For Carbon Bond Formation written by Pradp Bgle and published by . This book was released on 2023-09-14 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a comprehensive guidebook that covers the recent advances in gold and silver co-operative catalysis for carbon-carbon and carbon-heteroatom bond formation. The use of gold and silver in catalysis has revolutionized the field of organic synthesis, allowing for the development of new reactions and strategies that were previously inaccessible. The Book provides an in-depth discussion of the various gold and silver co-operative catalysis strategies and their application in the synthesis of a wide range of organic molecules, including pharmaceuticals, natural products, and materials. The author describes the key steps involved in these reactions, including the design of suitable catalysts, optimization of reaction conditions, and purification of the products. Also covers the use of gold and silver co-operative catalysis in the synthesis of other important compounds such as heterocycles, carbenes, and vinylidene complexes. The author discusses the advantages and limitations of gold and silver co-operative catalysis compared to other catalytic systems and provides practical guidance for researchers interested in using these catalysts in their own synthetic projects. Overall, "Gold and Silver Co-Operative Catalysis for Carbon Bond Formation" is an essential reference for synthetic chemists, medicinal chemists, and material scientists who are interested in the development of new catalytic systems for carbon-carbon and carbon-heteroatom bond formation using gold and silver co-operative catalysis.
Author : Robert L. Augustine
Publisher : CRC Press
ISBN 13 : 9780824767877
Total Pages : 480 pages
Book Rating : 4.7/5 (678 download)
Download or read book Carbon-carbon Bond Formation written by Robert L. Augustine and published by CRC Press. This book was released on 1979-04-01 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Stanislav Popov
Publisher :
ISBN 13 :
Total Pages : 511 pages
Book Rating : 4.:/5 (129 download)
Download or read book Catalytic Generation and C-C Bond Forming Reactions of Dicoordinated Carbocations written by Stanislav Popov and published by . This book was released on 2021 with total page 511 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation describes the development of Lewis acid-based methodology togenerate dicoordinated carbocations catalytically. These reactive intermediates were once sparingly accessible synthetically and were mostly the focus of theoretical studies. This dissertation highlights new, mild conditions that can generate these species in a kinetically persistent fashion through the use of weakly coordinating anions in non-polar media. These conditions also enable new carbon-carbon bond forming reactions of these intermediates to take place; either through Friedel-Crafts or C-H insertion. Additionally mechanistic nuances and the key advantages and disadvantages of each developed system will be highlighted. Overall, this work features the development of this chemistry from a fundamental study to a more broadly applicable reaction. Chapter One is a brief overview of the current state of research on aryl and vinyl cations. This chapter serves as a prelude to the remaining chapters and will be referenced throughout this dissertation. Strategies to generate these reactive species, specifically ones that inspired our own research in this area are presented. Furthermore, some reactivity of these cations is also highlighted, again focusing on mechanistically similar reactions to our own. Chapter Two describes our efforts in the development of a silylium-carborane catalyzed reaction to generate aryl and vinyl cations catalytically from aryl fluorides and vinyl triflates respectively. These species were then able to be engaged in intermolecular reactions with inert C-H bonds of both alkanes and arenes resulting in a mild C-H functionalization reaction. Chapter Three discusses our investigations of lithium-based Lewis acids to generate reaction vinyl cations under highly basic conditions and their ensuing reactivity. Notably, this work also overcomes some of the challenges presented in chapter Two with regards to the functional group compatibility of these systems. This work represents an important advancement of our chemistry towards a more robust, practical reaction. Chapter Four highlights an ongoing effort in our research group to utilize different vinyl sulfonate precursors in order to access a broader class of vinyl cation intermediates. With these precursors in hand, we utilize similar conditions to Chapter Three to develop some new vinyl cation reactivity. These reactions involve trapping of vinyl cations with allylsilanes, silyl ketene acetals, and methyl ethers. Chapter Five discusses our ongoing effort to develop a "field guide" for the practicing organic chemist in order to disseminate some of our groups in-house knowledge in developing these cation methodologies over the past few years. Here, mechanistic nuances, substrate design, and choice of catalytic system are discussed.
Author : Sha Lou
Publisher :
ISBN 13 :
Total Pages : 678 pages
Book Rating : 4.:/5 (355 download)
Download or read book Catalytic Asymmetric Carbon-carbon Bond Forming Reactions and Synthesis written by Sha Lou and published by . This book was released on 2008 with total page 678 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : E.G. Derouane
Publisher : Springer Science & Business Media
ISBN 13 : 9401143293
Total Pages : 497 pages
Book Rating : 4.4/5 (11 download)
Download or read book Combinatorial Catalysis and High Throughput Catalyst Design and Testing written by E.G. Derouane and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 497 pages. Available in PDF, EPUB and Kindle. Book excerpt: Catalysts are central in modern industrial chemistry and there is an urgent need to develop new catalysts. Such a rapid pace of development brings with it a new set of challenges at all levels of research, from synthesis and characterization to testing and modelling. This book reviews the current status of combinatorial catalysis, scientific catalyst design techniques, methods for preparing inorganic combinatorial libraries, experimental design methods, data processing, system modelling an simulation, and catalyst testing. The individual contributions reveal the development of high throughput catalyst design and test methods and identify the main challenges in the field, including new catalyst preparation techniques, rapid performance evaluation, and new microreactor configurations. Readership: All those working in catalytic process analysis and development. The extensive review of catalysis principles is especially relevant for postgraduate students seeking to pursue studies in catalysis.
Author : Jean-Marie Basset
Publisher : Springer Science & Business Media
ISBN 13 : 9400929714
Total Pages : 340 pages
Book Rating : 4.4/5 (9 download)
Download or read book Surface Organometallic Chemistry: Molecular Approaches to Surface Catalysis written by Jean-Marie Basset and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: Surface organometallic chemistry is a new field bringing together researchers from organometallic, inorganic, and surface chemistry and catalysis. Topics ranging from reaction mechanisms to catalyst preparation are considered from a molecular basis, according to which the "active site" on a catalyst surface has a supra-molecular character. This. the first book on the subject, is the outcome of a NATO Workshop held in Le Rouret. France, in May. 1986. It is our hope that the following chapters and the concluding summary of recommendations for research may help to provide a definition of surface organometallic chemistry. Besides catalysis. the central theme of the Workshop, four main topics are considered: 1) Reactions of organometallics with surfaces of metal oxides, metals. and zeolites; 2) Molecular models of surfaces, metal oxides, and metals; 3) Molecular approaches to the mechanisms of surface reactions; 4) Synthesis and modification of zeolites and related microporous solids. Most surface organometallic chemistry has been carried out on amorphous high-surf ace-area metal oxides such as silica. alumina. magnesia, and titania. The first chapter. contributed by KNOZINGER. gives a short summary of the structure and reactivity of metal oxide surfaces. Most of our understanding of these surfaces is based on acid base and redox chemistry; this chemistry has developed from X-ray and spectroscopic data, and much has been inferred from the structures and reactivities of adsorbed organic probe molecules. There are major opportunities for extending this understanding by use of well-defined (single crystal) oxide surfaces and organometallic probe molecules.
Author : Theodore Michael Tarasow
Publisher :
ISBN 13 :
Total Pages : 278 pages
Book Rating : 4.:/5 (763 download)
Download or read book Tailored Biocatalysts for Carbon-carbon Bond Forming and Cleaving Reactions written by Theodore Michael Tarasow and published by . This book was released on 1994 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon-carbon bond forming and cleaving reactions represent some of the most useful and fascinating of all chemical transformations. The mechanism and scope of many of these reactions have been rigorously studied not only because of their intrinsic chemical interest but also because carbon-carbon bond forming and cleaving transformations play essential roles in both biological (enzymatic transformations) and nonbiological processes (organic synthesis). My doctoral research has involved three areas related to the catalysis of carbon-carbon bond forming and cleaving reactions. Specifically, my work has built on previous achievements in this area, focusing on the investigation of factors important in antibody catalysis, the expansion of the current antibody-catalyzed reaction repertoire, and the extension of the transition state analog approach for generating catalysts to new macromolecular receptors. Thus, I have characterized a family of decarboxylase antibodies raised against the same naphthalene disulfonate hapten in order to gain some insights into medium effects in protein catalysis. A general, parallel trend in binding site hydrophobicity and catalytic efficiency was apparent, but the few inconsistencies observed emphasized the fact that proteins can solve catalytic challenges in a number of ways, regardless of how simple the model reaction seems. I have also applied TRNOE techniques for the first time to a catalytic antibody system to investigate the bound conformation of a flexible substrate molecule. These studies show that binding site properties correlate to a certain extent with hapten design, and that antibodies generated against a compact transition state analog can use their binding energy to fix substrate in a high energy conformation resembling the hapten. Research toward expanding the reaction repertoire of catalytic antibodies has involved designing and synthesizing transition state analogs for a tandem aza-Cope-Mannich reaction and for an industrially relevant Diels-Alder reaction. The fact that no catalysts were detected in either experiment points out our incomplete knowledge of effective hapten design. Finally, I have applied in vitro selection techniques to isolate RNA molecules capable of binding a Diels-Alder cycloaddition transition state analog. These unique receptors were assayed for their ability to catalyze the cognate Diels-Alder reaction using a newly developed catELISA technique. While a novel ribozyme was not isolated, the results provide a foundation from which to further pursue RNA catalysis.
Author : Anna Mette Hansen
Publisher :
ISBN 13 :
Total Pages : 171 pages
Book Rating : 4.:/5 (466 download)
Download or read book Development of a New Carbon-carbon Bond Forming Reaction Promoted by Samarium Diiodide written by Anna Mette Hansen and published by . This book was released on 2006 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : René Michael Königs
Publisher :
ISBN 13 : 9783861303848
Total Pages : 113 pages
Book Rating : 4.3/5 (38 download)
Download or read book Development of New Catalytic C-C Bond Forming and Hydrogenation Reactions written by René Michael Königs and published by . This book was released on 2011 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Arkadi Vigalok
Publisher : Springer
ISBN 13 : 3642120733
Total Pages : 198 pages
Book Rating : 4.6/5 (421 download)
Download or read book C-X Bond Formation written by Arkadi Vigalok and published by Springer. This book was released on 2010-06-30 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents: Kilian Muñiz: Transition Metal Catalyzed Electrophilic Halogenation of C-H bonds in alpha-Position to Carbonyl Groups; Arkadi Vigalok * and Ariela W Kaspi: Late Transition Metal-Mediated Formation of Carbon-Halogen Bonds; Paul Bichler and Jennifer A. Love*: Organometallic Approaches to Carbon-Sulfur Bond Formation; David S. Glueck: Recent Advances in Metal-Catalyzed C-P Bond Formation; Andrei N. Vedernikov: C-O Reductive Elimination from High Valent Pt and Pd Centers; Lukas Hintermann: Recent Developments in Metal-Catalyzed Additions of Oxygen Nucleophiles to Alkenes and Alkynes; Moris S. Eisen: Catalytic C-N, C-O and C-S bond formation promoted by organoactinide complexes.
Author : Philippe Serp
Publisher : John Wiley & Sons
ISBN 13 : 047017885X
Total Pages : 612 pages
Book Rating : 4.4/5 (71 download)
Download or read book Carbon Materials for Catalysis written by Philippe Serp and published by John Wiley & Sons. This book was released on 2008-12-31 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first comprehensive book covering all aspects of the use of carbonaceous materials in heterogeneous catalysis. It covers the preparation and characterization of carbon supports and carbon-supported catalysts; carbon surface chemistry in catalysis; the description of catalytic, photo-catalytic, or electro-catalytic reactions, including the development of new carbon materials such as carbon xerogels, aerogels, or carbon nanotubes; and new carbon-based materials in catalytic or adsorption processes. This is a premier reference for carbon, inorganic, and physical chemists, materials scientists and engineers, chemical engineers, and others.
Author : Vijaya Bhasker Gondi
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (232 download)
Download or read book Asymmetric Catalysis of Carbon-carbon Bond Forming Reactions Through Hydrogen Bonding written by Vijaya Bhasker Gondi and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
