Download or read book Rhodium catalyzed 5 1 and 5 2 Cycloadditions Using 1 4 enyne as the Five carbon Component written by Wangze Song and published by . This book was released on 2016 with total page 956 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transition metal-catalyzed cycloaddition reaction is one of the most efficient ways to access ring systems and remains to be one of the most active areas in organic chemistry. The discovery of 3-acyloxy-1,4-enyne (ACE) and 3-hydroxy-1,4-enyne (HYE) as the five-carbon components has led to the development of various Rh-catalyzed [5+1] and [5+2] cycloadditions in our group. These novel methods offered efficient access to highly substituted six- and seven-membered carbocycles. I will present our progresses on the development, application and mechanistic studies of the following four [5+1] and [5+2] cycloadditions. 1) Using ACE bearing an electron-rich ester as the five-carbon component, a [5+1] cycloaddition was realized under mild conditions for the preparation of highly substituted phenols. 2) Based on our previous success on Rh-catalyzed intermolecular [5+2] cycloaddition of ACE and alkynes, a library of highly substituted tropones was successfully prepared by modifying the cycloheptatriene products derived from the [5+2] cycloaddition. 3) The scope of the Rh-catalyzed intramolecular [5+2] cycloaddition of ACE with alkenes was expanded and the Rh-catalyzed intramolecular [5+2] cycloaddition of ACE with allenes was developed for the synthesis of highly functionalized bicyclic 5-7 fused ring systems with multiple stereogenic centers. 4) Using HYE as the 5-carbon component, a [5+1] carbonylative benzannulation reaction was previously developed in our group for the synthesis of tricyclic carbazoles. The scope of this tandem reaction is now expanded to the synthesis of tetra- and even pentacyclic ring systems including furocarbazoles, thiophenocarbazole, pyrrolocarbazole, and indolocarbazole. Metal carbene intermediates are involved in most of these cycloadditions. The strategy of using propargylic esters and propargylic alcohols as the Rh(I) carbene precursor should have broad implications in transition metal catalysis and metal carbene chemistry.

Download or read book Computational Methods in Organometallic Catalysis written by Yu Lan and published by John Wiley & Sons. This book was released on 2021-03-24 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book includes a historical introduction to organometallic chemistry, a survey of mechanisms, and an extensive introduction to quantum mechanical computational methods.

Download or read book Catalyst Components for Coupling Reactions written by Gary A. Molander and published by Handbook of Reagents for Organ. This book was released on 1999 with total page 694 pages. Available in PDF, EPUB and Kindle. Book excerpt: The long awaited Handbook for all synthetic chemists working on coupling reactions, compiling all major catalyst components in use in the area. Consists of a compilation of articles taken from the EROS database, with the inclusion of about 20 newly commissioned catalysts/pre-catalysts/ligands that have made an impact in this area of synthetic organic chemistry. Includes catalyst systems used in Heck, Kumada-Tamao-Corriu, Suzuki-Miyaura, Hiyama-Hatanaka, Negishi, Migita-Kosugi-Stille, Buchwald-Hartwig, and Tsuji-Trost coupling reactions.

Download or read book Rhodium catalyzed Cycloadditions and Cycloisomerizations Involving Propargylic Esters and Alcohols written by Xiaoxun Li and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transition metal-catalyzed cyloaddition and cycloisomerization reactions occupy a central position within the realm of organic synthesis. Research described in this thesis focuses on using propargylic esters and alcohols as building blocks for rhodium(I)-catalyzed cycloadditions and cycloisomerizations. The discovery and application of combining the [pi]-acidity and redox/insertion reactivity of rhodium(I) complexes, led to the development of many new reactions. By taking advantage of Rh-catalyzed 1,3-acyloxy migration of propargylic esters, I developed two tandem reactions. One is Rh-catalyzed carbonylation of 3-acyloxy-1,4-enynes (ACEs) for the synthesis of highly substituted cyclopentenones, and the other is ring expansion of cyclopropanes or cyclobutanes for the preparation of highly functionalized seven-membered or eight-membered carbocycles. By taking advantage of Rh-catalyzed 1,2-acyloxy migration of propargylic esters adjacent to heterocycles, I developed a novel and practical method for the preparation of a series of heterocycles including indoles, benzofurans, carbazoles and benzothiophenes from substituted pyrroles, furans, indoles and thiophenes. Inspired by the first Rh-catalyzed intra- and intermolecular [5+2] cycloadditions of 3-acyloxy-1,4-enynes (ACEs) with alkynes, I developed a new five-carbon building block, an inverted ACE, for [5+2] cycloadditions by switching the position of the alkene and alkyne groups in ACE. By replacing the acyloxy group in ACE with OH leaving group and aniline nucleophile, a completely new type of 5-carbon building block (HYE) was designed for cycloadditions. The tandem indole annulation and [5+1] cycloaddition was realized for the synthesis of various highly substituted carbazoles. Natural products glycosinine and mahanimbine were prepared. Furthermore, indolyl Rh(I)-carbene could be generated from 3-hydroxy-1,4-enyne (HYE) through a dehydration process. With different N-protecting group, I prepared dimeric indoles, cyclopropyl indoles, vinyl indoles and other interesting indole derivatives.

Download or read book Metals and Non metals written by Navjeet Kaur and published by CRC Press. This book was released on 2020-01-28 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: Design of new processes that avoid the use of toxic reagents has been the focus of intense research of late. Catalysis by metals and non-metals offers diverse opportunities for the development of new organic reactions with promising range of selectivities—chemoselectivity, regioselectivity, diastereoselectivity, and enantioselectivity. Furthermore, these transformations frequently occur under mild conditions, tolerate a broad array of functional groups, and proceed with high stereoselectivity. The area of catalysis is sometimes referred to as a ‘foundational pillar’ of green chemistry. Catalytic reactions often reduce energy requirements and decrease separations because of increased selectivity; they are also capable of permitting the use of renewable feedstocks of less toxic reagents or minimizing the quantities of reagents needed. New catalytic organic synthesis methodologies have, thus, offered several possibilities for considerable improvement in the eco-compatibility of fine chemical production. Hence, these catalytic methodologies have emerged as powerful tools for the efficient and chemoselective synthesis of heterocyclic molecules. Key Features: Presents the synthesis of different five-membered heterocycles. Contains the most up-to-date information in this fast-moving field. Covers novel catalytic approaches used in the study and application of catalysts in synthetic organic reactions. Presents new methodologies for the synthesis of heterocycles.

Download or read book Studies of Rhodium catalyzed 5 2 Cycloadditions and Their Applications in Organic Synthesis written by Craig Owen Husfeld and published by . This book was released on 2001 with total page 744 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Rhodium Catalysis in Organic Synthesis written by Ken Tanaka and published by John Wiley & Sons. This book was released on 2019-05-06 with total page 684 pages. Available in PDF, EPUB and Kindle. Book excerpt: An essential reference to the highly effective reactions applied to modern organic synthesis Rhodium complexes are one of the most important transition metals for organic synthesis due to their ability to catalyze a variety of useful transformations. Rhodium Catalysis in Organic Synthesis explores the most recent progress and new developments in the field of catalytic cyclization reactions using rhodium(I) complexes and catalytic carbon-hydrogen bond activation reactions using rhodium(II) and rhodium(III) complexes. Edited by a noted expert in the field with contributions from a panel of leading international scientists, Rhodium Catalysis in Organic Synthesis presents the essential information in one comprehensive volume. Designed to be an accessible resource, the book is arranged by different reaction types. All the chapters provide insight into each transformation and include information on the history, selectivity, scope, mechanism, and application. In addition, the chapters offer a summary and outlook of each transformation. This important resource: -Offers a comprehensive review of how rhodium complexes catalyze a variety of highly useful reactions for organic synthesis (e.g. coupling reactions, CH-bond functionalization, hydroformylation, cyclization reactions and others) -Includes information on the most recent developments that contain a range of new, efficient, elegant, reliable and useful reactions -Presents a volume edited by one of the international leading scientists working in the field today -Contains the information that can be applied by researchers in academia and also professionals in pharmaceutical, agrochemical and fine chemical companies Written for academics and synthetic chemists working with organometallics, Rhodium Catalysis in Organic Synthesis contains the most recent information available on the developments and applications in the field of catalytic cyclization reactions using rhodium complexes.

Download or read book The Pauson Khand Reaction written by Ramon Rios Torres and published by John Wiley & Sons. This book was released on 2012-03-01 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Pauson-Khand reaction is an important reaction in the field of organic chemistry. It involves the transition-metal catalysed cycloaddition of an alkyne, an alkene and carbon monoxide, to produce cyclopentenones. The importance of this reaction originates from its high value in transforming simple components into the synthetically useful cyclopentenone unit, in which a high degree of molecular complexity can be achieved in a single step, with impressive stereochemical and regiochemical control. The Pauson-Khand Reaction investigates the nature and many variations of this reaction. Topics covered include: the mechanisms of Pauson‐Khand-type reactions non chiral intramolecular and intermolecular versions of Pauson‐Khand reactions asymmetric Pauson‐Khand reaction using chiral auxiliaries the enantioselective Pauson‐Khand reaction Pauson‐Khand reactions catalysed by metals other than cobalt unconventional Pauson‐Khand reactions the Pauson‐Khand reaction in total synthesis Presenting a comprehensive overview of this fundamental reaction, The Pauson-Khand Reaction will find a place on the bookshelves of any organic or organometallic chemist.

Download or read book The Design and Development of a New Reaction Rhodium catalyzed 5 2 Cycloadditions written by Jennifer Ann Love and published by . This book was released on 2000 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Carbon Monoxide in Organic Synthesis written by Bartolo Gabriele and published by John Wiley & Sons. This book was released on 2021-09-30 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon Monoxide in Organic Synthesis A thoroughly up-to-date overview of carbonylation reactions in the presence of carbon monoxide In Carbon Monoxide in Organic Synthesis: Carbonylation Chemistry, expert researcher and chemist Bartolo Gabriele delivers a robust summary of the most central advances in the field of carbonylation reactions in the presence of carbon monoxide. Beginning with a brief introduction on the importance of carbon monoxide as a building block in modern organic synthesis, the author goes on to describe metal-catalyzed carbonylations utilizing iron, cobalt, nickel, copper, and manganese. Descriptions of palladium, ruthenium, and rhodium-catalyzed reactions follow, as do discussions of metal-free carbonylation processes. The book is organized by metal to make the book useful as a guide for researchers from both academia and industry whose work touches on the direct synthesis of carbonyl compounds, carboxylic acid derivatives, and heterocycles. It aims to stimulate further discoveries in this rapidly developing field. Readers will also enjoy: A thorough introduction to carbonylations promoted by first row transition metal catalysts, including cobalt-catalyzed and nickel-catalyzed carbonylations An exploration of carbonylations promoted by second row transition metal catalysts, including ruthenium-, rhodium-, palladium(0)-, and palladium (II)-catalyzed carbonylations Practical discussions of miscellaneous carbonylation reactions, including carbonylations promoted by third row transition metal catalysts and metal-free carbonylation processes Perfect for catalytic and organic chemists, Carbon Monoxide in Organic Synthesis: Carbonylation Chemistry is also an indispensable resource for chemists working with organometallics and industrial chemists seeking a summary of important processes used to synthesize value-added products.

Download or read book Handbook of Fullerene Science and Technology written by Xing Lu and published by Springer Nature. This book was released on 2022-09-24 with total page 1029 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanocarbon chemistry and physics is a fast-developing, broad research area – the Nobel prizes in 1996 and 2010 awarded to two key discoveries in the field, and several other nanocarbon achievements of comparable importance. Owing to this rapid growth, the nanocarbon landscape fundamentally changes every few years, creating a need to survey the field on a regular basis to update the books that have become incomplete or even obsolete. As such, this book focuses on fullerenes and metallofullerenes and also on the related areas of nanotubes and graphenes. All the covered research topics provide important fundamental knowledge for the natural sciences, but also for applications in molecular electronics, superconductivity, catalysis, photovoltaics and medical diagnostics. The current nanocarbon research activities have particularly high application potential in the conversion of solar energy, future molecular memories, non-conventional materials for optoelectronics, and new treatments for civilization diseases. Offering a truly up-to-date critical survey of nanocarbon science, its concepts and highlights, it follows the concept of a handbook: it addresses key topics systematically, from historical background, methodological aspects, current important issues, and application potential, all supplied with extensive referencing. With individual chapters written by leading experts with extensive research experience, it is a comprehensive reference resource for graduate students and active researchers alike.

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 Comprehensive Organometallic Chemistry III Volume 3 written by D. M. P. Mingos and published by . This book was released on 2007 with total page 976 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides essential information for any chemist or technologist who needs to use or apply organometallic compounds. Provides a comprehensive overview of recent developments in the field and attempts to predict trends in the field over the next ten years.

Download or read book Inventing Reactions written by Lukas J. Gooßen and published by Springer. This book was released on 2012-10-30 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt: Barry Trost: Transition metal catalyzed allylic alkylation.- Jeffrey W. Bode: Reinventing Amide Bond Formation.- Naoto Chatani and Mamoru Tobisu: Catalytic Transformations Involving the Cleavage of C-OMe Bonds.- Gregory L. Beutner and Scott E. Denmark: The Interplay of Invention, Observation and Discovery in the Development of Lewis Base Activation of Lewis Acids for Catalytic Enantioselective Synthesis.- David R. Stuart and Keith Fagnou: The Discovery and Development of a Palladium(II)-Catalyzed Oxidative Cross-Coupling of Two Unactivated Arenes.- Lukas Gooßen and Käthe Gooßen: Decarboxylative Cross-Coupling Reactions.- A. Stephen K. Hashmi: Gold-Catalyzed Organic Reactions.- Ben List: Developing Catalytic Asymmetric Acetalizations.- Steven M. Bischof, Brian G. Hashiguchi, Michael M. Konnick, and Roy A. Periana: The De NovoDesign of CH Bond Hydroxylation Catalysts.- Benoit Cardinal-David, Karl A. Scheidt: Carbene Catalysis: Beyond the Benzoin and Stetter Reactions.- Kenso Soai and Tsuneomi Kawasaki: Asymmetric autocatalysis of pyrimidyl alkanol.- Douglas C. Behenna and Brian M. Stoltz: Natural Products as Inspiration for Reaction Development: Catalytic Enantioselective Decarboxylative Reactions of Prochiral Enolate Equivalents. Hisashi Yamamoto: Acid Catalysis in Organic Synthesis.

Download or read book Solvents as Reagents in Organic Synthesis written by Xiao-Feng Wu and published by John Wiley & Sons. This book was released on 2018-01-03 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by highly renowned and experienced authors, this is the only reference on the application of solvents as reagents. Clearly structured, the text describes various methods for the activation and reaction of these small molecules, highlighting the synthetic opportunities as well as process-oriented advantages. To this end, all relevant types of solvents are covered separately and emphasized with numerous synthetic examples, while taking care to explain applications so as to avoid undesired side reactions. The result is a unique resource for every synthetic chemist and reaction engineer in industry and academia working on the methodical optimization of synthetic transformations.

Download or read book Computational Methods in Organometallic Catalysis written by Yu Lan and published by John Wiley & Sons. This book was released on 2021-06-28 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: Computational Methods in Organometallic Catalysis Discover recent advances in the mechanistic study of organometallic catalysis In Computational Methods in Organometallic Catalysis: From Elementary Reactions to Mechanisms, distinguished chemist and author Yu Lan delivers a synthesis of the use of calculation methods and experimental techniques to improve the efficiency of reaction and yield of product and to uncover the factors that control the selectivity of product. Providing not only a theoretical overview of organometallic catalysis, the book also describes computational studies for the mechanism of transition-metal-assisted reactions. You’ll learn about Ni-, Pd-, Pt-, Co-, Rh-, Ir-, Fe-, Ru-, Mn-, Cu-, Ag-, and Au- catalysis. You’ll also discover many of the experimental and theoretical advances in organometallic catalysis reported in the recent literature. The book summarizes and generalizes the advances made in the mechanistic study of organometallic catalysis. Readers will also benefit from the inclusion of: A thorough introduction to computational organometallic chemistry, including a brief history of the discipline and the use of computational tools to study the mechanism of organometallic chemistry An exploration of computational methods in organometallic chemistry, including density functional theory methods and basis sets and their application in mechanism studies A practical discussion of elementary reactions in organometallic chemistry, including coordination and dissociation, oxidative addition, reductive elimination, insertion, elimination, transmetallation, and metathesis A concise treatment of the theoretical study of transition-metal catalysis. Perfect for organic, catalytic, complex, and structural chemists, Computational Methods in Organometallic Catalysis will also earn a place in the libraries of theoretical chemists seeking a one-stop organometallic catalysis resource with a focus on the mechanism of transition-metal-assisted reactions.

Download or read book Boronic Acids written by Dennis G. Hall and published by John Wiley & Sons. This book was released on 2006-05-12 with total page 571 pages. Available in PDF, EPUB and Kindle. Book excerpt: For the first time, the whole field of organoboronic acids is presented in one comprehensive handbook. Professor Dennis Hall, a rising star within the community, covers all aspects of this important substance class, including applications in chemistry, biology and medicine. Starting with an introduction to the structure, properties, and preparation of boronic acid derivatives, together with an overview of their reactions and applications, the book goes on to look at metal-catalyzed borylation of alkanes and arenas, coupling reactions and rhodium-catalyzed additions of boronic acids to alkenes and carbonyl compounds. There follows chapters on copper-promoted C-O and C-N cross-coupling of boronic acids, recent applications in organic synthesis, as well as alpha-haloalkylboronic esters in asymmetric synthesis. Later sections deal with cycloadditions, organoboronic acids, oxazaborolidines as asymmetric inducers, and boronic acid based receptors and sensors. The whole is rounded off with experimental procedures, making this invaluable reading for organic, catalytic and medicinal chemists, as well as those working in organometallics.