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| Author | : Veronique Michelet |
| Publisher | : World Scientific |
| Total Pages | : 564 |
| Release | : 2014-06-20 |
| Genre | : Science |
| ISBN | : 1783265558 |
Download Gold Catalysis: An Homogeneous Approach Book in PDF, ePub and Kindle
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.
| Author | : LeGrande M. Slaughter |
| Publisher | : Springer |
| Total Pages | : 292 |
| Release | : 2015-03-30 |
| Genre | : Science |
| ISBN | : 3319137220 |
Download Homogeneous Gold Catalysis Book in PDF, ePub and Kindle
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.
| Author | : F. Dean Toste |
| Publisher | : |
| Total Pages | : 564 |
| Release | : 2014-08-01 |
| Genre | : Catalysis |
| ISBN | : 9781848168534 |
Download Gold Catalysis Book in PDF, ePub and Kindle
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.
| Author | : Yanzhao Wang |
| Publisher | : |
| Total Pages | : 285 |
| Release | : 2014 |
| Genre | : |
| ISBN | : 9781321203318 |
Download Homogeneous Gold Catalysis Book in PDF, ePub and Kindle
In the past dozen years, great progress has been made in developing highly efficient homogenous gold catalysis. As soft "pi" Lewis acids, cationic gold(I) complexes are particularly powerful in terms of activating alkyne/allene towards nucleophilic attack, leading to a variety of synthetically versatile structures. During my research, several synthetic methods have been developed, including: (1) Au-catalyzed ligand-directed anti nucleophilic attack of alkynes; the new ligands I developed enable highly efficient gold-catalyzed nucleophilic addition of acids, anilines and water to the alkynes; and catalyst loadings could be lowered to 10 parts per million; (2) rapid access of chroman-3-ones via gold-catalyzed oxidation of propargyl aryl ethers; this step-economic and efficient transformation was realized by a bulky gold catalyst, Me4tBuXPhosAuNTf2 and bulky electron-deficient pyridine N-oxides derived from Hantzsch esters; (3) Au-catalyzed novel indole synthesis via a key [3,3] sigmatropic rearrangement; 2-alkylindoles were produced with high regioselectivity and efficiency from easily accessed N-arylhydroxylamines under mild conditions; an improved approach involved cooperative dual catalysis of Zn and Au was developed; much broader substrate scope, shorter reaction time and good to excellent yields were achieved.
| Author | : A. Stephen K. Hashmi |
| Publisher | : John Wiley & Sons |
| Total Pages | : 419 |
| Release | : 2012-05-21 |
| Genre | : Science |
| ISBN | : 3527319522 |
Download Modern Gold Catalyzed Synthesis Book in PDF, ePub and Kindle
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.
| Author | : Lise Molinari |
| Publisher | : |
| Total Pages | : 181 |
| Release | : 2013 |
| Genre | : |
| ISBN | : |
Download Homogeneous Gold Catalysis Book in PDF, ePub and Kindle
| Author | : Manish Kumar |
| Publisher | : |
| Total Pages | : 185 |
| Release | : 2014 |
| Genre | : Catalysts |
| ISBN | : |
Download Mechanistic Insights and Functionalization of Alkynes in Homogeneous Gold Catalysis Book in PDF, ePub and Kindle
The focus of my dissertation work was to study the basic mechanistic insights of gold-catalyzed reactions. Although the various mechanistic pathways of gold catalysis are better understood nowadays, numerous questions still remain unanswered concerning the nature of deactivation of the catalyst's active species, high resistance towards protodeauration, and how we can solve these problems to improve the efficiency of gold catalysis. To address these challenges in gold catalysis we conducted first a detailed experimental study to understand the mechanism of deactivation of gold active species. Based on the combination of experimental data, we proposed that gold disproportionation is preferred as compared to reduction of the active gold catalyst. To address the high resistance toward protodeauration, we explored a new strategy to enhance the efficacy of gold-catalyzed reactions through hydrogen-bonding assisted protodeauration using additives chosen for their pKBHX (hydrogen-bond basicity). To address the threshold phenomenon, we observed that high gold affinity impurities (halides, bases) in solvents, starting materials, filtration or drying agents could affect the reactivity of the gold catalyst adversely, which, in turn, may significantly reduce the TON of cationic gold. Use of a suitable acid activator (e.g. HOTf, In(OTf)3) reactivates the gold catalyst and makes the reaction proceed smoothly at low gold catalyst loading. To explore the reactivity of Au catalysts towards oxygen-atom transfer reactions, we investigated the gold-catalyzed addition of O-nucleophiles to alkynes and found that this reaction can produce synthetically important vinyl ether products in excellent yields and regioselectivities at room temperature. At higher temperature, 3,3-sigmatropic rearrangement of vinyl ether products gives access to highly functionalized benzotriazoles.
| Author | : Sreekumar Pankajakshan |
| Publisher | : |
| Total Pages | : 0 |
| Release | : 2009 |
| Genre | : |
| ISBN | : |
Download Synthetic and Mechanistic Prospects of Homogeneous Gold Catalysis Book in PDF, ePub and Kindle
| Author | : David Joel Gorin |
| Publisher | : |
| Total Pages | : 1292 |
| Release | : 2008 |
| Genre | : |
| ISBN | : |
Download Stabilized Cationic Reaction Intermediates in Homogeneous Gold Catalysis Book in PDF, ePub and Kindle
| Author | : Can Li |
| Publisher | : John Wiley & Sons |
| Total Pages | : 860 |
| Release | : 2014-04-03 |
| Genre | : Technology & Engineering |
| ISBN | : 3527675922 |
Download Bridging Heterogeneous and Homogeneous Catalysis Book in PDF, ePub and Kindle
There are two main disciplines in catalysis research -- homogeneous and heterogeneous catalysis. This is due to the fact that the catalyst is either in the same phase (homogeneous catalysis) as the reaction being catalyzed or in a different phase (heterogeneous catalysis). Over the past decade, various approaches have been implemented to combine the advantages of homogeneous catalysis (efficiency, selectivity) with those of heterogeneous catalysis (stability, recovery) by the heterogenization of homogeneous catalysts or by carrying out homogeneous reactions under heterogeneous conditions. This unique handbook fills the gap in the market for an up-to-date work that links both homogeneous catalysis applied to organic reactions and catalytic reactions on surfaces of heterogeneous catalysts. As such, it highlights structural analogies and shows mechanistic parallels between the two, while additionally presenting kinetic analysis methods and models that either work for both homogeneous and heterogeneous catalysis. Chapters cover asymmetric, emulsion, phase-transfer, supported homogeneous, and organocatalysis, as well as in nanoreactors and for specific applications, catalytic reactions in ionic liquids, fluorous and supercritical solvents and in water. Finally, the text includes computational methods for investigating structure-reactivity relations. With its wealth of information, this invaluable reference provides academic and industrial chemists with novel concepts for innovative catalysis research.
