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Author: Zhen-Hua Wang Publisher: OAE Publishing Inc. ISBN: Category : Science Languages : en Pages : 20
Book Description
Sulfur-based ylides are very important and valuable reagents in organic synthesis and have been widely applied in the preparation of cyclic compounds and the formation of C-X (X = C, N, O, S, B, P) bond. Since the early 2000s, asymmetric organocatalysis has become a powerful strategy in organic synthesis (even highlighted by the 2021 Nobel Prize in Chemistry) and has attracted widespread research interest among synthetic organic chemists. In this area, a large number of outstanding achievements have been registered in the novel chiral catalysts design, new compounds synthesis, various reagents application, and versatile reaction discovery. Given the extensive application of sulfonium and sulfoxonium ylides in organic synthesis, in this review, we mainly summarize the organocatalyzed asymmetric reactions involving these ylide reagents as one of the reactants. Detailed reaction mechanisms, transition states and some synthetic applications are highlighted. The challenges and opportunities of this field are also discussed in the outlook.
Author: Zhen-Hua Wang Publisher: OAE Publishing Inc. ISBN: Category : Science Languages : en Pages : 20
Book Description
Sulfur-based ylides are very important and valuable reagents in organic synthesis and have been widely applied in the preparation of cyclic compounds and the formation of C-X (X = C, N, O, S, B, P) bond. Since the early 2000s, asymmetric organocatalysis has become a powerful strategy in organic synthesis (even highlighted by the 2021 Nobel Prize in Chemistry) and has attracted widespread research interest among synthetic organic chemists. In this area, a large number of outstanding achievements have been registered in the novel chiral catalysts design, new compounds synthesis, various reagents application, and versatile reaction discovery. Given the extensive application of sulfonium and sulfoxonium ylides in organic synthesis, in this review, we mainly summarize the organocatalyzed asymmetric reactions involving these ylide reagents as one of the reactants. Detailed reaction mechanisms, transition states and some synthetic applications are highlighted. The challenges and opportunities of this field are also discussed in the outlook.
Author: John S. Nelson Publisher: SUNY Press ISBN: 9780887063718 Category : Political Science Languages : en Pages : 396
Book Description
This book reassesses the academic field of political theory and brings into sharp relief its problems and opportunities. Here for the first time, diverse theorists coordinate their arguments through a common focus. This focus is the writing of John G. Gunnell. Gunnell attacks a set of myths said to plague almost every recent theory about politics: the myth of the given, the myth of science, myths of theory, the myth of tradition, and the myth of the political. He argues that these all alienate political theory from substantive inquiry and actual practice. Contributors include Richard E. Flathman, Russell L. Hanson, George Kateb, Paul F. Kress, J. Donald Moon, John S. Nelson, J.G.A. Pocock, Herbert G. Reid, Ira L. Strauber, Nathan Tarcov, and Sheldon S. Wolin. They respond on behalf of projects in the new history of political theory, epic theory, phenomenology, traditional theory, and political deconstruction. These discussions also address the theories of Hans-Georg Gadamer, Jürgen Habermas, Karl Marx, Leo Strauss, Alain Touraine, and Ludwig Wittgenstein. At the conclusion of the volume, Gunnell reconsiders his arguments in light of the respondent's remarks. His challenges thus provide a series of confrontations - both exciting and provocative - among major theorists. The result is a lively debate about what political theory is, how it relates to political history and practice, and how it involves epistemology. The authors probe a broad range of questions about practices of politics and traditions of discourse, and they identify priorities for the future of the field.
Author: Takeshi Toru Publisher: John Wiley & Sons ISBN: 3527623248 Category : Science Languages : en Pages : 448
Book Description
In this first book to gather the information on this hot topic otherwise widely spread throughout the literature, experienced editors and top international authors cover everything the reader needs -- from the synthesis of chiral organosulfur compounds to applications and catalysis: * Asymmetric synthesis of chiral sulfinates and sulfoxides * Synthesis and use of chiral dithioacetal derivatives, ylids, chiral sulfoximines and sulfinamides * Use of chiral sulfoxides as ligands in catalysis * Asymmetric reactions of alpha-sulfenyl, alpha-sulfinyl and alpha-sulfonyl carbanions. As a result, readers will be able to improve their own performance in asymmetric synthesis.
Author: Oleg V. Larionov Publisher: Springer ISBN: 3319606875 Category : Science Languages : en Pages : 163
Book Description
The series Topics in Heterocyclic Chemistry presents critical reviews on present and future trends in the research of heterocyclic compounds. Overall the scope is to cover topics dealing with all areas within heterocyclic chemistry, both experimental and theoretical, of interest to the general heterocyclic chemistry community. The series consists of topic related volumes edited by renowned editors with contributions of experts in the field. All chapters from Topics in Heterocyclic Chemistry are published Online First with an individual DOI. In references, Topics in Heterocyclic Chemistry is abbreviated as Top Heterocycl Chem and cited as a journal.
Author: Xuefeng Jiang Publisher: Springer Nature ISBN: 3030255980 Category : Science Languages : en Pages : 477
Book Description
The series Topics in Current Chemistry Collections presents critical reviews from the journal Topics in Current Chemistry organized in topical volumes. 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.
Author: Takahiko Akiyama Publisher: John Wiley & Sons ISBN: 1119736412 Category : Science Languages : en Pages : 798
Book Description
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.
Author: Tsutomu Ishikawa Publisher: John Wiley & Sons ISBN: 9780470740866 Category : Science Languages : en Pages : 336
Book Description
Guanidines, amidines and phosphazenes have been attracting attention in organic synthesis due to their potential functionality resulting from their extremely strong basicity. They are also promising catalysts because of their potential for easy molecular modification, possible recyclability, and reduced or zero toxicity. Importantly, these molecules can be derived as natural products – valuable as scientists move towards “sustainable chemistry”, where reagents and catalysts are derived from biomaterial sources. Superbases for Organic Synthesis is an essential guide to these important molecules for preparative organic synthesis. Topics covered include the following aspects: an introduction to organosuperbases physicochemical properties of organic superbases amidines and guanidines in organic synthesis phosphazene: preparation, reaction and catalytic role polymer-supported organosuperbases application of organosuperbases to total synthesis related organocatalysts: proton sponges and urea derivatives amidines and guanidines in natural products and medicines Superbases for Organic Synthesis is a comprehensive, authoritative and up-to-date guide to these important reagents for organic chemists, drug discovery researchers and those interested in the chemistry of natural products.
Author: Michal Szostak Publisher: MDPI ISBN: 3039212036 Category : Science Languages : en Pages : 466
Book Description
The amide bond represents a privileged motif in chemistry. The recent years have witnessed an explosion of interest in the development of new chemical transformations of amides. These developments cover an impressive range of catalytic N–C bond activation in electrophilic, Lewis acid, radical, and nucleophilic reaction pathways, among other transformations. Equally relevant are structural and theoretical studies that provide the basis for chemoselective manipulation of amidic resonance. This monograph on amide bonds offers a broad survey of recent advances in activation of amides and addresses various approaches in the field.
Author: Akkattu T. Biju Publisher: John Wiley & Sons ISBN: 3527809058 Category : Science Languages : en Pages : 440
Book Description
Summarizing the emerging field of N-heterocyclic carbenes used in organocatalysis, this is an excellent overview of the synthesis and applications of NHCs focusing on carbon-carbon and carbon-heteroatom bond formation. Alongside comprehensive coverage of the synthesis, characteristics and applications, this handbook and ready reference also includes chapters on NHCs for polymerization reactions and natural product synthesis.
Author: Zhen-Hua Wang
Author: Zhen-Hua Wang
Author: John S. Nelson
Author: Takeshi Toru
Author: Charles James Matthew Stirling
Author: Oleg V. Larionov
Author: Xuefeng Jiang
Author: Takahiko Akiyama
Author: Tsutomu Ishikawa
Author: Michal Szostak
Author: Akkattu T. Biju