Download or read book Photoredox mediated Metal free C H Alkylation and Dual Catalysis written by Jennifer K. Matsui and published by . This book was released on 2018 with total page 1536 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past decade, a resurgence of interest in photo-induced electron transfer has resulted in a new class of organic transformations. The ability to harness over 60 kcal/mol of visible light energy to activate redox-labile substrates--via the intermediacy of a photoredox catalyst--has enabled reactions under extraordinarily mild conditions compared to alternative two-electron modes of activation. Recent research efforts have broadened the scope of trifluoroborate coupling partners, employed 1,4-dihydropyridines (DHPs) in mono- and dual-catalytic manifolds, and accessed new chemical space via C-H functionalization pathways. First, the development of alkyltrifluoroborates as latent radicals for C-H alkylation of heteroarenes under photocatalytic conditions is described. Notably, the catalytic generation of carbon-centered radicals and the BF3 byproduct accomplishes a regioselective and atom-economical approach to the classical Minisci reaction. Subsequent reports disclose DHPs as unique radical precursors that do not require the use of a photocatalyst to effect a single-electron oxidation. Instead, DHPs are oxidized in the presence persulfate, facilitated by their low oxidation potentials. Furthermore, photoredox/Ni dual catalysis protocols have been developed to overcome several inherent limitations of palladium-catalyzed cross-couplings [i.e., forcing reaction conditions, limited scope for C(sp3)-C(sp 2) bond formation] by invoking a single-electron transmetalation pathway. Within the area of photoredox/Ni catalysis, a library of natural and unnatural aryl chromanones are accessed from the corresponding trifluoroboratochromanones and aryl bromides. In an effort to expand the radical toolbox by utilizing feedstock chemicals (e.g., aldehydes) to access radicals inspired the exploration of DHPs as radical partners in the dual catalytic paradigm. Exploiting the one-step procedure to access highly functionalized DHPs, a library of monosaccharide DHPs were synthesized and employed in the dual catalytic cross-coupling procedure with aryl bromides. In summary, the mild, photoredox-mediated C-H alkylation of heteroarenes represents a late-stage functionalization strategy to rapidly access highly functionalized motifs. Additionally, photoredox/Ni dual catalysis has enabled the modular synthesis of functionalized aryl chromanones and monosaccharides. Throughout these reported studies, it is clear the controlled and catalytic nature of photoredox catalysis enables previously challenging transformations and is primed for significant advancements in the near future.
Download or read book Visible Light Photocatalysis in Organic Chemistry written by Corey R.J. Stephenson and published by John Wiley & Sons. This book was released on 2018-05-29 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: Filling the need for a ready reference that reflects the vast developments in this field, this book presents everything from fundamentals, applications, various reaction types, and technical applications. Edited by rising stars in the scientific community, the text focuses solely on visible light photocatalysis in the context of organic chemistry. This primarily entails photoinduced electron transfer and energy transfer chemistry sensitized by polypyridyl complexes, yet also includes the use of organic dyes and heterogeneous catalysts. A valuable resource to the synthetic organic community, polymer and medicinal chemists, as well as industry professionals.
Download or read book Zinc Catalysis written by Stephan Enthaler and published by John Wiley & Sons. This book was released on 2015-04-27 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: Filling the gap in the market for comprehensive coverage of this hot topic, this timely book covers a wide range of organic transformations, e. g. reductions of unsaturated compounds, oxidation reactions, Friedel-Crafts reactions, hydroamination reactions, depolymerizations, transformations of carbon dioxide, oxidative coupling reactions, as well as C-C, C-N, and C-O bond formation reactions. A chapter on the application of zinc catalysts in total synthesis is also included. With its aim of stimulating further research and discussion in the field, this is a valuable reference for professionals in academia and industry wishing to learn about the latest developments.
Download or read book Homogeneous Photocatalysis written by M. Chanon and published by John Wiley & Sons. This book was released on 1997-03-06 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: Photocatalysis and related processes occupy a strategic position for the future of photochemistry. This volume provides an introduction to basic concepts and explains how applications work at the molecular level.
Download or read book Science of Synthesis Dual Catalysis in Organic Synthesis 1 written by G. A. Molander and published by Thieme. This book was released on 2020-05-22 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt: The field of dual catalysis has developed rapidly over the last decade, and these volumes define its impact on organic synthesis. The most important, basic concepts of synergistic, dual catalytic cycles are introduced, providing newcomers to the field with reliable information on this new approach to facilitating the synthesis of organic molecules. Background information and reliable procedures for challenging transformations in synthesis are presented, applying the concept of cooperative dual catalysis as a means of increasing molecular complexity in the most efficient manner. The most useful, practical, and reliable methods for dual catalysis combining metal catalysts, organocatalysts, photocatalysts, and biocatalysts are presented.
Download or read book Nickel Catalysis in Organic Synthesis written by Sensuke Ogoshi and published by John Wiley & Sons. This book was released on 2020-03-09 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive reference to nickel chemistry for every scientist working with organometallic catalysts Written by one of the world?s leading reseachers in the field, Nickel Catalysis in Organic Synthesis presents a comprehensive review of the high potential of modern nickel catalysis and its application in synthesis. Structured in a clear and assessible manner, the book offers a collection of various reaction types, such as cross-coupling reactions, reactions for the activation of unreactive bonds, carbon dioxide fixation, and many more. Nickel has been recognized as one of the most interesting transition metals for homogeneous catalysis. This book offers an overview to the recently developed new ligands, new reaction conditions, and new apparatus to control the reactivity of nickel catalysts, allowing scientists to apply nickel catalysts to a variety of bond-forming reactions. A must-read for anyone working with organometallic compounds and their application in organic synthesis, this important guide: -Reviews the numerous applications of nickel catalysis in synthesis -Explores the use of nickel as a relatively cheap and earth-abundant metal -Examines the versatility of nickel catalysis in reactions like cross-coupling reactions and CH activations -Offers a resource for academics and industry professionals Written for catalytic chemists, organic chemists, inorganic chemists, structural chemists, and chemists in industry, Nickel Catalysis in Organic Synthesis provides a much-needed overview of the most recent developments in modern nickel catalysis and its application in synthesis.
Download or read book Organosilicon Chemistry written by Tamejiro Hiyama and published by John Wiley & Sons. This book was released on 2020-02-18 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides a unique summary of important catalytic reactions in the presence of silicon A must-have for all synthetic chemists, this book summarizes all of the important developments in the application of organosilicon compounds in organic synthesis and catalysis. Edited by two world leaders in the field, it describes different approaches and covers a broad range of reactions, e.g. catalytic generation of silicon nucleophiles, Si-H Bond activation, C-H bond silylation, silicon-based cross-coupling reactions, and hydrosilylation in the presence of earth-abundant metals. In addition to the topics covered above, Organosilicon Chemistry: Novel Approaches and Reactions features chapters that look at Lewis base activation of silicon Lewis acids, silylenes as ligands in catalysis, and chiral silicon molecules. -The first book about this topic in decades, covering a broad range of reactions -Covers new approaches and novel catalyst systems that have been developed in recent years -Written by well-known, international experts in the areas of organometallic silicon chemistry and organosilicon cross-coupling reactions Organosilicon Chemistry: Novel Approaches and Reactions is an indispensable source of information for synthetic chemists in academia and industry, working in the field of organic synthesis, catalysis, and main-group chemistry.
Download or read book Photocatalysis written by Dionysios D Dionysiou and published by Royal Society of Chemistry. This book was released on 2016-03-30 with total page 395 pages. Available in PDF, EPUB and Kindle. Book excerpt: From environmental remediation to alternative fuels, this book explores the numerous important applications of photocatalysis. The book covers topics such as the photocatalytic processes in the treatment of water and air; the fundamentals of solar photocatalysis; the challenges involved in developing self-cleaning photocatalytic materials; photocatalytic hydrogen generation; photocatalysts in the synthesis of chemicals; and photocatalysis in food packaging and biomedical and medical applications. The book also critically discusses concepts for the future of photocatalysis, providing a fascinating insight for researchers. Together with Photocatalysis: Fundamentals and Perspectives, these volumes provide a complete overview to photocatalysis.
Download or read book Anion Binding Catalysis written by Olga Garcia-Mancheno and published by John Wiley & Sons. This book was released on 2022-03-21 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explores the potential of new types of anion-binding catalysts to solve challenging synthetic problems Anion-Binding Catalysis introduces readers to the use of anion-binding processes in catalytic chemical activation, exploring how this approach can contribute to the future design of novel synthetic transformations. Featuring contributions by world-renowned scientists in the field, this authoritative volume describes the structure, properties, and catalytic applications of anions as well as synthetic applications and practical analytical methods. In-depth chapters are organized by type of catalyst rather than reaction type, providing readers with an accessible overview of the existing classes of effective catalysts. The authors discuss the use of halogens as counteranions, the combination of (thio)urea and squaramide-based anion-binding with other types of organocatalysis, anion-binding catalysis by pnictogen and tetrel bonding, nucleophilic co-catalysis, anion-binding catalysis by pnictogen and tetrel bonding, and more. Helping readers appreciate and evaluate the potential of anion-binding catalysis, this timely book: Illustrates the historical development, activation mode, and importance of anion-binding in chemical catalysis Explains the analytic methods used to determine the anion-binding affinity of the catalysts Describes catalytic and synthetic applications of common NH- and OH-based hydrogen-donor catalysts as well as C-H triazole/triazolium catalysts Covers amino-catalysis involving enamine, dienamine, or iminium activation approaches Discusses new trends in the field of anion-binding catalysis, such as the combination of anion-binding with other types of catalysis Presenting the current state of the field as well as the synthetic potential of anion-binding catalysis in future, Anion-Binding Catalysis is essential reading for researchers in both academia and industry involved in organic synthesis, homogeneous catalysis, and pharmaceutical chemistry.
Download or read book Activation of Small Molecules written by William B. Tolman and published by John Wiley & Sons. This book was released on 2006-12-13 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first to combine both the bioinorganic and the organometallic view, this handbook provides all the necessary knowledge in one convenient volume. Alongside a look at CO2 and N2 reduction, the authors discuss O2, NO and N2O binding and reduction, activation of H2 and the oxidation catalysis of O2. Edited by the highly renowned William Tolman, who has won several awards for his research in the field.
Download or read book Biotransformations written by K. Faber and published by Springer Science & Business Media. This book was released on 2003-06-30 with total page 235 pages. Available in PDF, EPUB and Kindle. Book excerpt: Whereas the hydrolases such as proteases, esterases and lipases are sufficiently well researched to be applied in every standard laboratory, other types of enzymes are still waiting to be discovered with respect to their applicability in organic-chemistry transformations on a preparative scale. This latter point is stressed here, with the focus on the newcomer-enzymes'which show great synthetic potential.
Download or read book Organic Redox Chemistry written by Jun-Ichi Yoshida and published by John Wiley & Sons. This book was released on 2022-03-07 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: Organic Redox Chemistry Explore the most recent advancements and synthesis applications in redox chemistry Redox chemistry has emerged as a crucial research topic in synthetic method development. In Organic Redox Chemistry: Chemical, Photochemical and Electrochemical Syntheses, some key researchers in this field, including editors Dr. Frédéric W. Patureau and the late Dr. Jun-Ichi Yoshida, deliver an insightful exploration of this rapidly developing topic. This book highlights electron transfer processes in synthesis by using different techniques to initiate them, allowing for a multi-directional perspective in organic redox chemistry. Covering a wide array of the important and recent developments in the field, Organic Redox Chemistry will earn a place in the libraries of chemists seeking a one-stop resource that compares chemical, photochemical, and electrochemical methods in organic synthesis.
Download or read book Heterocycles Via Cross Dehydrogenative Coupling written by Ananya Srivastava and published by . This book was released on 2019 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses the developments in the synthesis and functionalization of different heterocycles based on the formation of carbon-carbon (C-C) and carbon-heteroatom (C-X) bonds using cross-dehydrogenative coupling (CDC). Consisting of 13 chapters, the book systematically describes the advances in the synthesis and functionalization of nitrogen, oxygen, and sulfur-containing heterocycles. It also discusses the various mechanistic pathways to help readers gain an in-depth understanding of the CDC reactions of heterocycles. Lastly, in order to promote green chemistry, it addresses a range of metal-free CDC reactions of heterocycles - an area that has attracted significant attention in both academic and industrial research.
Download or read book Oxidative Cross Coupling Reactions written by Aiwen Lei and published by John Wiley & Sons. This book was released on 2016-08-12 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first handbook on this emerging field provides a comprehensive overview of transition metal-catalyzed coupling reactions in the presence of an oxidant. Following an introduction to the general concept and mechanism of this reaction class, the team of authors presents chapters on C-C cross-coupling reactions using organometallic partners, C-Heteroatom bond forming reactions via oxidative couplings, and C-H couplings via C-H activation. The text also covers such groundbreaking topics as recent achievements in the fields of C-C and C-X bond formation reactions as well as C-H activation involving oxidative couplings. With its novel and concise approach towards important building blocks in organic chemistry and its focus on synthetic applications, this handbook is of great interest to all synthetic chemists in academia and industry alike.
Download or read book Synthetic Applications written by Rajender S. Varma and published by Walter de Gruyter GmbH & Co KG. This book was released on 2022-05-09 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetic nanocatalysts are becoming an important tool for greener catalytic processes in chemical transformations in view of the ease of their removal from a reaction medium. This book explores assorted magnetic nanocatalysts, their deployment in synthesis, chemical transformation and their recovery and reuse. Various thematic topics embodied include magnetic nanocatalysts for S-S bond formation, N-heterocycle formation, C-heteroatom bond formation, silica-supported catalysts, multicomponent reactions, including their recyclability; another available volume emphasizes the utility of magnetic nanocatalysts in industrial appliances.
Download or read book Photochemical Key Steps in Organic Synthesis written by Jochen Mattay and published by John Wiley & Sons. This book was released on 2008-07-11 with total page 361 pages. Available in PDF, EPUB and Kindle. Book excerpt: Basic laboratory technique in organic chemistry plays a vital part in the education of chemistry students. This textbook contains a collection of multistep experiments that all feature one or two photochemical key steps. More than 40 researchers active in the field of organic photochemistry have contributed their favorite experiments for this unusual and modern textbook. In addition, a general section discusses reaction control, the interpretation of UV spectra, quantum yields and chemical yields, and gives information on solvents, lamps, filters, and vessels. The experiments chosen fulfil the following criteria: * starting materials are cheap and readily available * the necessary photochemical equipment is available in (most) institutes * products prepared are useful for further syntheses * the light reaction is efficient. 'Photochemical Key Steps' is a source book of new ideas for supervisors of lab courses and gives students the opportunity to learn about modern techniques in the laboratory and about the important role photochemistry plays in organic synthesis.
Download or read book Photoorganocatalysis In Organic Synthesis written by Maurizio Fagnoni and published by World Scientific. This book was released on 2019-02-19 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of organocatalysts able to photocatalyze an organic reaction is a rapidly growing field. These photocatalyzed transformations are more environmentally sustainable with respect to the use of expensive/toxic metal-based (photo)catalysts.Based on the authors' extensive experience in photogenerated intermediates, this book presents an overview on photocatalyzed organic processes having a synthetic significance, where an organic molecule functions as the photocatalyst.After a brief introduction defining the nature and the characteristics of a photoorganocatalyst (POC), the chapters are organized according to the class of POC used, as detailed below.Each chapter begins with a summary of the photophysical characteristics of the POCs and is followed by selected examples of synthetic applications. The last two chapters are devoted to the adoption of photoorganocatalysis in polymerization and to flow photoorganocatalysis. These in-depth explanations and practical applications make this title an essential reading for any chemistry student interested in organic (sustainable) synthesis.
