Download or read book Gold catalyzed Functionalizations of Inert Carbon carbon Multiple Bonds written by Chad Brouwer and published by . This book was released on 2010 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt: Described in this manuscript is the development of novel methodologies for organic syntheses that are catalyzed by gold complexes. In particular, it is demonstrated that gold complexes are well-suited for the activation of inert carbon-carbon multiple bonds, such as alkenes and conjugated dienes, towards the attack of specific nitrogen and sulfur-based nucleophiles. Also, it is shown that dimethylgold(III) complexes supported by anionic ligands are currently not suitable as catalysts for the polymerization of olefins as the gold-carbon bond is not readily cleaved. Lastly, the foundation for the catalytic activity of gold in the +2 oxidation state has been established and it is shown that they can be used for the activation and transfer of carbenes.

Download or read book Gold Catalysis written by F. Dean Toste and published by . This book was released on 2014-08-01 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research on designing new catalytic systems has been one of the most important fields in modern organic chemistry, and one reason for this is the predominant contribution of catalysis to the concepts of atom economy and green chemistry in the 21st century. Gold, considered catalytically inactive for a long time, is now a fascinating partner of modern chemistry, as scientists such as Bond, Haruta, Hutchings, Ito and Hayashi opened new perspectives for the whole synthetic chemist community. This book presents the major advances in homogeneous catalysis, emphasizing the methodologies that create carbon-carbon and carbon-heteroatom bonds, the applications that create diversity and synthesize natural products, and the recent advances and challenges in asymmetric catalysis and computational research. The Handbook of Homogeneous Gold Catalysis provides readers with in-depth information about gold-catalyzed reactions and presents several explanations for the scientific design of a catalyst. Readers will be able to understand the entire gold area and find solutions to problems in catalysis. Featuring prominent authors, who are experts in their respective fields, this is the first book dedicated to homogeneous gold chemistry. Contents: From Gold in Nature to Gold Catalysts (S Kramer and F Gagosz); Oxidation and Reduction Reactions (L Zhang); Gold-Catalyzed Addition of Carbon Nucleophile to C-C Multiple Bond (B Simmons and H C Shen); Gold-Catalyzed Addition of Heteroatom Nucleophile to C-C Multiple Bond (N Asao, N Hatakeyama and Y Yamamoto); Gold-Catalyzed Synthesis of Heterocycles (A Arcadi); Multi-Component Reactions (R Skouta and C J Li); Gold Catalyzed Tandem and Cascade Reactions (R-S Liu); Cycloisomerization Reactions of 1, n -Enynes (N Huguet and A Echavarren); Gold-Catalyzed Reaction of Propargylic Esters (L Fensterbank, J-P Goddard, M Malacria and S Simonneau); Gold-Catalyzed Cross-Coupling Reactions (S Blum); Gold-Catalyzed Reactions: A Computational Approach (E Soriano & J Marco-Contelles); Asymmetric Gold-Catalyzed Reactions (P Y Toullec, A Pradal and V Michelet); Gold Catalysis in Natural Product Synthesis (M Gesinski and F D Toste). Readership: Student, professionals.

Download or read book Gold Catalysis An Homogeneous Approach written by Veronique Michelet and published by World Scientific. This book was released on 2014-06-20 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research on designing new catalytic systems has been one of the most important fields in modern organic chemistry. One reason for this is the predominant contribution of catalysis to the concepts of atom economy and green chemistry in the 21st century. Gold, considered catalytically inactive for a long time, is now a fascinating partner of modern chemistry, as scientists such as Bond, Teles, Haruta, Hutchings, Ito and Hayashi opened new perspectives for the whole synthetic chemist community. This book presents the major advances in homogeneous catalysis, emphasizing the methodologies that create carbon-carbon and carbon-heteroatom bonds, the applications that create diversity and synthesize natural products, and the recent advances and challenges in asymmetric catalysis and computational research.It provides readers with in-depth information about homogeneous gold-catalyzed reactions and presents several explanations for the scientific design of a catalyst. Readers will be able to understand the entire gold area and find solutions to problems in catalysis.Gold Catalysis — An Homogeneous Approach is part of the Catalytic Science Series and features prominent authors who are experts in their respective fields.

Download or read book Catalytic Carbonylative Functionalization of Multiple Carbon carbon Bonds written by and published by . This book was released on 2014 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dual metal and Metaloid Reactivity with Gold I written by Joshua J. Hirner and published by . This book was released on 2014 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chapter 1. This chapter provides a very brief introduction to the field of homogeneous gold(I) catalysis and discusses the context of the Blum group's previous studies in this area. Chapter 2: Organogold compounds undergo stoichiometric cross-coupling reactions with aryl and vinyl bromides in high yield under mild, nickel-catalyzed conditions. The reaction tolerates both electron-rich and electron-poor organogold complexes, and vinyl bromides undergo cross-coupling with high stereoselectivity. This novel transformation links well-established nickel catalysis with more recent developments in organogold transformations. Chapter 3: A vinyl aziridine activation strategy cocatalyzed by Pd(0) and a Au(I) Lewis acid was developed. This rearrangement installs a C-C and a C-N bond in one synthetic step to form pyrrolizidine and indolizidine products. Two proposed mechanistic roles for the gold cocatalyst were considered: (1) carbophilic gold catalysis or (2) azaphilic gold catalysis. Mechanistic studies support an azaphilic Lewis acid activation of the aziridine over a carbophilic Lewis acid activation of the alkene. Chapter 4: A borylation reaction cocatalyzed by Au and Rh was proposed as a means of isolating catalytic organogold intermediates as the corresponding organoboron derivatives for use in subsequent functionalization steps. Products consistent with the proposed reactivity were obtained, but control experiments indicated no role for Rh in the reaction; organogold complexes were found to undergo facile thermal reactivity with electrophilic B without Rh. Electronic effects in the chemoselective borylation of heterocyclic organogold complexes were studied, suggesting design parameters used in the development of the Au-catalyzed borylation reactions discussed in Chapters 5 and 6. Chapter 5: For nearly 70 years, the addition of boron-X sigma bonds to carbon-carbon multiple bonds has been employed in the preparation of organoboron reagents. However, the significantly higher strength of boron-oxygen bonds has thus far precluded their activation for addition, preventing a direct route to access a potentially valuable class of oxygen-containing organoboron reagents for divergent synthesis. Herein is discussed an alkoxyboration reaction, the addition of boron-oxygen sigma bonds to alkynes. Functionalized O-heterocyclic boronic acid derivatives are produced using this transformation, which is mild and exhibits broad functional group compatibility. Our results demonstrate activation of this boron-oxygen bond using a gold catalysis strategy that is fundamentally different from that used previously for other boron addition reactions. Chapter 6: Four additional investigations stemming from the benzofuran-forming alkoxyboration reaction (Chapter 5) are described. Discussed are electronic effects in the B/Au transmetalation reaction, progress towards an intermolecular alkoxyboration reaction, and the expansion of the alkoxyboration concept to two additional substrate classes for intramolecular B-O sigma-bond activation reactivity.

Download or read book Catalysis by Gold written by Geoffrey Colin Bond and published by . This book was released on 2006-01-01 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gold has traditionally been regarded as inactive as a catalytic metal. However, the advent of nanoparticulate gold on high surface area oxide supports has demonstrated its high catalytic activity in many chemical reactions. Gold is active as a heterogeneous catalyst in both gas and liquid phases, and complexes catalyse reactions homogeneously in solution. Many of the reactions being studied will lead to new application areas for catalysts by gold in pollution control, chemical processing, sensors and fuel cell technology. This book describes the properties of gold, the methods for preparing gold catalysts and ways to characterise and use them effectively in reactions. The reaction mechanisms and reasons for the high activities are discussed and the applications for gold catalysis considered.

Download or read book Gold I Mediated Nucleophilic Additions to Allenes written by Zhan Wang and published by . This book was released on 2012 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ability of gold(I) complexes to activate carbon-carbon multiple bonds for the addition of nitrogen and oxygen nucleophiles has emerged as an attractive synthetic method in organic chemistry. While many transformations catalyzed by gold(I) have been reported in recent years, few studies provide insight into the mechanism of gold(I) mediated processes. The first half of this thesis will discuss the development of an enantioselective gold(I)-catalyzed hydroamination of allenes with hydroxylamine and hydrazine nucleophiles and mechanistic studies of this and related systems. The second half of this thesis will cover our efforts to incorporate gold(I) catalysts into supramolecular host-guest complexes and will highlight potential advantages of this novel approach to gold(I) reactions. Chapter 1. In this chapter, we report a novel enantioselective method for formation of isoxazolidines, pyrazolidines and tetrahydrooxazine heterocycles catalyzed by dinuclear bisphosphine gold(I) complexes. Furthermore, we discuss our efforts toward the development of a dynamic kinetic resolution of chiral allenes via intermolecular asymmetric hydroamination. Chapter 2. We perform detailed kinetic studies to elucidate the mechanism of two transformations: the gold(I)-catalyzed hydroamination of allenes with hydrazine nucleophiles and the intramolecular hydroamination of dienes in the presence of alcohol co-catalysts. While the hydroamination of allenes proceeds via an outer sphere 0¥ð-acid mechanism, the related reaction with dienes likely proceeds via a Lewis-acid assisted-Br3ansted acid pathway. Chapter 3. This chapter will focus on our efforts to incorporate catalytically active gold(I) complexes into tetrahedral supramolecular guest of the form Ga4L6. Using such a complex, we catalyze the intramolecular hydroalkoxylation of allenes. We demonstrate that encapsulation of gold(I) increases the rate of reaction relative to Me3PAuBr and also leads to improved catalyst lifetime. Chapter 4. Herein we apply the supramolecular host-guest complex with gold(I) and Ga4L6 to tandem reactions with enzymes. The encapsulated complex performs as well, if not better than the 60free6± gold(I) complex in chemoenzymatic processes with a variety of esterase and lipases. In some cases the free gold(I) cations significantly reduce the rate of enzyme catalysis while the encapsulated complex has no effect on enzyme activity.

Download or read book Catalytic Asymmetric Synthesis written by Takahiko Akiyama and published by John Wiley & Sons. This book was released on 2022-05-27 with total page 798 pages. Available in PDF, EPUB and Kindle. Book excerpt: Catalytic Asymmetric Synthesis Seminal text presenting detailed accounts of the most important catalytic asymmetric reactions known today This book covers the preparation of enantiomerically pure or enriched chemical compounds by use of chiral catalyst molecules. While reviewing the most important catalytic methods for asymmetric organic synthesis, this book highlights the most important and recent developments in catalytic asymmetric synthesis. Edited by two well-qualified experts, sample topics covered in the work include: Metal catalysis, organocatalysis, photoredox catalysis, enzyme catalysis C–H bond functionalization reactions Carbon–carbon bond formation reactions, carbon–halogen bond formation reactions, hydrogenations, polymerizations, flow reactions Axially chiral compounds Retaining the best of its predecessors but now thoroughly up to date with the important and recent developments in catalytic asymmetric synthesis, the 4th edition of Catalytic Asymmetric Synthesis serves as an excellent desktop reference and text for researchers and students, from upper-level undergraduates all the way to experienced professionals in industry or academia.

Download or read book Homogeneous Gold Catalysis written by LeGrande M. Slaughter and published by Springer. This book was released on 2015-03-30 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: The series Topics in Current Chemistry presents critical reviews of the present and future trends in modern chemical research. The scope of coverage is all areas of chemical science including the interfaces with related disciplines such as biology, medicine and materials science. The goal of each thematic volume is to give the non-specialist reader, whether in academia or industry, a comprehensive insight into an area where new research is emerging which is of interest to a larger scientific audience. Each review within the volume critically surveys one aspect of that topic and places it within the context of the volume as a whole. The most significant developments of the last 5 to 10 years are presented using selected examples to illustrate the principles discussed. The coverage is not intended to be an exhaustive summary of the field or include large quantities of data, but should rather be conceptual, concentrating on the methodological thinking that will allow the non-specialist reader to understand the information presented. Contributions also offer an outlook on potential future developments in the field. Review articles for the individual volumes are invited by the volume editors. Readership: research chemists at universities or in industry, graduate students.

Download or read book C C Bond Activation written by Guangbin Dong and published by Springer. This book was released on 2014-09-18 with total page 265 pages. Available in PDF, EPUB and Kindle. Book excerpt: The series Topics in Current Chemistry presents critical reviews of the present and future trends in modern chemical research. The scope of coverage is all areas of chemical science including the interfaces with related disciplines such as biology, medicine and materials science. The goal of each thematic volume is to give the non-specialist reader, whether in academia or industry, a comprehensive insight into an area where new research is emerging which is of interest to a larger scientific audience. Each review within the volume critically surveys one aspect of that topic and places it within the context of the volume as a whole. The most significant developments of the last 5 to 10 years are presented using selected examples to illustrate the principles discussed. The coverage is not intended to be an exhaustive summary of the field or include large quantities of data, but should rather be conceptual, concentrating on the methodological thinking that will allow the non-specialist reader to understand the information presented. Contributions also offer an outlook on potential future developments in the field. Review articles for the individual volumes are invited by the volume editors. Readership: research chemists at universities or in industry, graduate students

Download or read book Functional Polymers by Post Polymerization Modification written by Patrick Theato and published by John Wiley & Sons. This book was released on 2013-02-12 with total page 431 pages. Available in PDF, EPUB and Kindle. Book excerpt: In modern polymer science a variety of polymerization methods for the direct synthesis of polymers bearing functional groups are known. However, there is still a large number of functional groups that may either completely prevent polymerization or lead to side reactions. Post-polymerization modification, also known as polymer-analogous modification, is an alternative approach to overcome these limitations. It is based on the polymerization of monomers with functional groups that are inert towards the polymerization conditions but allow a quantitative conversion in a subsequent reaction step yielding a broad range of other functional groups. Thus, diverse libraries of functional polymers with identical average degrees of polymerization but variable side chain functionality may easily be generated. Filling the gap for a book dealing with synthetic strategies and recent developments, this volume provides a comprehensive and up-to-date overview of the field of post-polymerization modification. As such, the international team of expert authors covers a wide range of topics, including new synthetic techniques utilizing different reactive groups for post-polymerization modifications with examples ranging from modification of biomimetic and biological polymers to modification of surfaces. With its guidelines this is an indispensable and interdisciplinary reference for scientists working in both academic and industrial polymer research.

Download or read book Modern Supramolecular Gold Chemistry written by Antonio Laguna and published by John Wiley & Sons. This book was released on 2008-09-26 with total page 525 pages. Available in PDF, EPUB and Kindle. Book excerpt: Filling a gap in our systematic knowledge of gold, this monograph covers the fundamental aspects, while also considering new applications of gold compounds in catalysis, as nanoparticles, and their potential application as luminescent compounds. Written by an eminent team of authors from academia, the book analyzes the current status of gold chemistry, its special characteristics, oxidation states and main type of complexes, before going on to look at the synthesis of supramolecular aggregates due to the formation of gold-gold, gold-metal interactions or other secondary bonds. Final sections deal with LEDs, solvoluminescent and electroluminescent materials, liquid crystals and catalysis. While of interest to advanced chemistry students, this book is also useful for researchers interested in the chemistry of gold and its applications, as well as those involved in metal-metal interactions, heteronuclear chemistry or in the optical properties of coordination compounds.

Download or read book Arene Chemistry written by Jacques Mortier and published by John Wiley & Sons. This book was released on 2015-11-30 with total page 992 pages. Available in PDF, EPUB and Kindle. Book excerpt: Organized to enable students and synthetic chemists to understand and expand on aromatic reactions covered in foundation courses, the book offers a thorough and accessible mechanistic explanation of aromatic reactions involving arene compounds. • Surveys methods used for preparing arene compounds and their transformations • Connects reactivity and methodology with mechanism • Helps readers apply aromatic reactions in a practical context by designing syntheses • Provides essential information about techniques used to determine reaction mechanisms

Download or read book C H Bond Activation and Catalytic Functionalization I written by Pierre H. Dixneuf and published by Springer. This book was released on 2015-12-18 with total page 269 pages. Available in PDF, EPUB and Kindle. Book excerpt: The series Topics in Organometallic Chemistry presents critical overviews of research results in organometallic chemistry. As our understanding of organometallic structure, properties and mechanisms increases, new ways are opened for the design of organometallic compounds and reactions tailored to the needs of such diverse areas as organic synthesis, medical research, biology and materials science. Thus the scope of coverage includes a broad range of topics of pure and applied organometallic chemistry, where new breakthroughs are being achieved that are of significance to a larger scientific audience. The individual volumes of Topics in Organometallic Chemistry are thematic. Review articles are generally invited by the volume editors. All chapters from Topics in Organometallic Chemistry are published OnlineFirst with an individual DOI. In references, Topics in Organometallic Chemistry is abbreviated as Top Organomet Chem and cited as a journal.

Download or read book Synthesis of Heterocycles via Metal Catalyzed Reactions that Generate One or More Carbon Heteroatom Bonds written by John P. Wolfe and published by Springer. This book was released on 2013-09-11 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: Synthesis of Saturated Heterocycles via Metal-Catalyzed Alkene Carboamination or Carboalkoxylation Reactions, by John P. Wolfe Synthesis of Saturated Heterocycles via Metal-Catalyzed Alkene Diamination, Aminoalkoxylation, or Dialkoxylation Reactions, by Sherry R. Chemler Synthesis of Heterocycles via Metal-Catalyzed Wacker-Type Oxidative Cyclization Reactions of Alkoxy- or Amino-Alkenes, by Wanbin Zhang Synthesis of Saturated Heterocycles via Metal-Catalyzed Hydroamination or Hydroalkoxylation Reactions, by Lisa D. Julian Synthesis of Saturated Heterocycles via Metal-Catalyzed Allylic Alkylation Reactions, by Aaron Aponick Synthesis of Heterocycles via Metal-Catalyzed Cascade/Domino Reactions that Generate a C–N or C–O Bond, by Mark Lautens Synthesis of Saturated Heterocycles via Metal-Catalyzed Formal Cycloaddition Reactions that Generate a C–N or C–O Bond, by Jerome Waser

Download or read book Modern Gold Catalyzed Synthesis written by A. Stephen K. Hashmi and published by John Wiley & Sons. This book was released on 2012-05-21 with total page 419 pages. Available in PDF, EPUB and Kindle. Book excerpt: With its impressive features, gold has led to completely new reaction types in recent years, which in turn have strongly influenced both organic catalysis and material science. Other fields where a significant amount of new results has been obtained include nanotechnology, self assembly/supramolecular systems and biochemical/medicinal chemistry. As a result, gold is one of the hottest topics in catalysis at the moment, with an increasing amount of research being carried out in this field. While focusing on homogeneous catalysis, this monograph also covers the main applications in heterogeneous catalysis. Following a look at the gold-catalyzed addition of heteroatom nucleophiles to alkynes, it goes on to discuss gold-catalyzed additions to allenes and alkenes, gold-catalyzed benzannulations, cycloisomerization and rearrangement reactions, as well as oxidation and reduction reactions. The whole is finished off with a section on gold-catalyzed aldol and related reactions and the application of gold-catalyzed reactions to natural product synthesis. Of interest to synthetic chemists and inorganic chemists, as well as organic chemists working in homogeneous catalysis, physical and technical chemists.

Download or read book Gold Chemistry written by Fabian Mohr and published by John Wiley & Sons. This book was released on 2009-04-20 with total page 425 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by world-class authors, this most recent major book on the topic highlights new and current trends as well as future directions. It is comprehensive in its scope, covering all aspects of gold chemistry -- from homogeneous to heterogeneous catalysis, from supramolecular assemblies to sensors and medicinal applications. The result is an invaluable work for both organic and inorganic chemists working in universities and industry, as well as material scientists.