Part I. Synthesis of Naturally Occurring Cyclobutanes Via Stereoselective Photocycloadditions Part II. Development of Photocatalytic Net-oxidative Transformations Using Copper(II) Salts as Terminal Oxidants PDF Download
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Author: Byung Joo Lee (Ph.D.)
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Among many unique transformations accessible using photochemical activation, the [2+2] photocycloaddition of olefins has had the largest impact on total synthesis. However, relatively few asymmetric total syntheses of natural products involving an enantioselective [2+2] photocycloaddition have been reported to date. This is due in part to the difficulty of conducting enantioselective [2+2] photocycloaddition reactions. Recent work in the Yoon lab has focused on developing enantioselective [2+2] photocycloadditions using a dual catalysis approach. The work presented herein will describe the use of chiral Lewis acid catalysts to enable highly enantioselective photocycloadditions and further application of this strategy toward natural product synthesis. Photoredox catalysis is a powerful strategy to generate radical and radical ion intermediates under exceptionally mild conditions. However, the development of photocatalytic oxidation reactions has been much more challenging compared to redox-neutral and net reductive transformations due to the lack of generally applicable terminal oxidants that are compatible with photoredox conditions. This thesis describes the use of copper(II) salts as terminal oxidants for robust photocatalytic oxidation reactions.
Author: Byung Joo Lee (Ph.D.)
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Among many unique transformations accessible using photochemical activation, the [2+2] photocycloaddition of olefins has had the largest impact on total synthesis. However, relatively few asymmetric total syntheses of natural products involving an enantioselective [2+2] photocycloaddition have been reported to date. This is due in part to the difficulty of conducting enantioselective [2+2] photocycloaddition reactions. Recent work in the Yoon lab has focused on developing enantioselective [2+2] photocycloadditions using a dual catalysis approach. The work presented herein will describe the use of chiral Lewis acid catalysts to enable highly enantioselective photocycloadditions and further application of this strategy toward natural product synthesis. Photoredox catalysis is a powerful strategy to generate radical and radical ion intermediates under exceptionally mild conditions. However, the development of photocatalytic oxidation reactions has been much more challenging compared to redox-neutral and net reductive transformations due to the lack of generally applicable terminal oxidants that are compatible with photoredox conditions. This thesis describes the use of copper(II) salts as terminal oxidants for robust photocatalytic oxidation reactions.
Author: Stephan Enthaler
Publisher: John Wiley & Sons
ISBN: 3527335986
Category : Technology & Engineering
Languages : en
Pages : 326
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Book Description
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.
Author: Maurizio Fagnoni
Publisher: World Scientific
ISBN: 1786346060
Category : Science
Languages : en
Pages : 600
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Book Description
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.
Author: Narayan S Hosmane
Publisher: World Scientific
ISBN: 1786344432
Category : Science
Languages : en
Pages : 1051
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Book Description
Boron science features in numerous fields including organic chemistry, organometallic chemistry and medicine. Boron is unique in all aspects of science and engineering and has made a significant impact in our daily lives through its use in fertilizers, germicides, fungicides, soaps, detergents, cancer drugs as well as many household glassware utensils, ceramics and cell phone windows. These volumes bring together an array of internationally renowned scientists to discuss the very latest developments in the application of boron in a broad range of disciplines. This multi-reference work describes the topic by appointing leading researchers to write on current developments in boron science, showcasing its importance to the four separate areas described in each volume: Organometallic Chemistry, Catalysis, Materials Chemistry and Medicine.Written to cover the full range of applications and innovations in boron science, this all-encompassing work offers us a one-stop reference compiled by world-leading researchers and practitioners of the subject, making it perfect for undergraduate and graduate students of chemistry, and researchers and practitioners interested in their professional development.
Author: Varun Rawat
Publisher: CRC Press
ISBN: 1000555534
Category : Science
Languages : en
Pages : 249
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Book Description
As the broad challenges around energy and the environment have become the focus of much research, scientists and experts have dedicated their efforts to developing more active and selective catalytic systems for key chemical transformations. For many decades environmentally viable protocols for the synthesis of fine chemicals have been the crux of academic and industrial research. Heterogeneous Catalysis in Organic Transformations serves as an overview of this work, providing a complete description of role of heterogeneous catalysis in organic transformations and offering a review of the current and near future technologies and applications. Discusses the fundamentals of catalysis and compares the advantages and disadvantages of different types of catalyst systems Examines oxide nanoparticles and noble metal nanoparticles Consider organometallic compounds, solid-supported catalysts, and mesoporous materials Describes recent advances in metal-based heterogeneous catalysts and new reactions with possible mechanistic pathways Providing a comprehensive review of heterogeneous catalysis from the basics through recent advances, this book will be of keen interest to undergraduates, graduates, and researchers in chemistry, chemical engineering, and associated fields.
Author: Peter I. Dalko
Publisher: John Wiley & Sons
ISBN: 3527610952
Category : Science
Languages : en
Pages : 559
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Book Description
In this reference leaders at the forefront of research provide an insight into one of the hottest topics in organic synthesis, focusing on the most important enantioselective reactions. Clearly structured, each entry begins with a concise introduction, including a mechanistic discussion of the reaction, followed by preparative guidelines for newcomers, such as carefully selected working procedures with critical notes for bench chemists, rules of thumb and tips and tricks.
Author: M. Chanon
Publisher: John Wiley & Sons
ISBN:
Category : Science
Languages : en
Pages : 440
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Book Description
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.
Author: Dennis P. Curran
Publisher: John Wiley & Sons
ISBN: 3527615229
Category : Science
Languages : en
Pages : 294
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Book Description
As little as a decade ago, radicals were regarded as interesting reactive intermediates with little synthetic use. However, recent results show that radicals have an enormous potential for applications in stereoselective reactions - it's all a matter of knowing what method to use and how to apply it. Three world experts in the field have combined their expertise and present the concepts to understand and even to predict the course of stereoselective radical reactions. In addition, guidelines are established which will enable the readers to plan and carry out their own stereoselective syntheses with radicals. A comprehensive list of references provides an easy access to the primary literature. The Stereochemistry of Radical Reactions is a highly topical introduction to this burgeoning field of research. Both advanced students and researchers active in the field will welcome this book as a source of concepts and ideas.
Author: Samir Z. Zard
Publisher: Oxford Chemistry Masters
ISBN: 9780198502418
Category : Science
Languages : en
Pages : 280
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Book Description
Samir Zard provides a description of radical reactions and their applications in organic synthesis. This book shows that an with an elementary knowledge of kinetic and some common sense, it is possible to harness radicals into a tremendously powerful tool for solving synthetic problems.
Author: Olga Garcia-Mancheno
Publisher: John Wiley & Sons
ISBN: 3527348573
Category : Technology & Engineering
Languages : en
Pages : 418
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Book Description
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.
