Download or read book Development of a New Heterocycle Forming Reaction and Kinetic Resolution with N Heterocyclic Carbenes written by Yinli Wang and published by Springer. This book was released on 2019-07-10 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book, the author focuses on exploring new organocatalytic transformations under operationally simple and environmentally friendly reaction conditions. Two new types of catalytic reactions promoted by N-heterocyclic carbenes (NHCs) are described. The oxa- and azacycle-forming reactions of sulfonylalkynols and sulfonylalkynamides are broadly considered to be a new type of activation mode in NHC chemistry, wherein the bond formation with internal O- and N-nucleophiles occurs at the γ-position of the propargyl sulfones with 1,2-sulfonyl migration. The resulting oxa- and azacycles are core structures in many biologically significant compounds and medicinally important agents. In addition, the book develops the chiral NHC-catalyzed kinetic resolution of α-hydroxy carboxylic acid derivatives based on chiral recognition of the substrate–cocatalyst complex. In this carboxylate cocatalyst-assisted chiral acylation, the reaction rate acceleration and selectivity enhancement are interpreted in terms of the reversible complexation of the substrate and carboxylate cocatalyst, which is verified by control experiments and measured using analytical methods. The findings described here reveal a promising new aspect of not only NHC catalysis but also identifying novel catalysis systems.
Download or read book N Heterocyclic Carbenes in Organocatalysis written by Akkattu T. Biju and published by John Wiley & Sons. This book was released on 2019-03-04 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Advances in Heterocyclic Chemistry written by Eric F.V. Scriven and published by Academic Press. This book was released on 2022-02-15 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Heterocyclic Chemistry, Volume 136 is the latest release in this definitive series in the field of heterocyclic chemistry, one of great importance to organic chemists, polymer chemists, and many biological scientists. Because biology and organic chemistry increasingly intersect, the associated nomenclature is used more frequently in explanations. Written by established authorities in the field from around the world, this comprehensive review combines descriptive synthetic chemistry and mechanistic insight to yield an understanding of how chemistry drives the preparation and useful properties of heterocyclic compounds. Considered the definitive serial in the field of heterocyclic chemistry Serves as the go-to reference for organic chemists, polymer chemists and many biological scientists Provides the latest comprehensive reviews written by established authorities in the field Combines descriptive synthetic chemistry and mechanistic insights to enhance understanding on how chemistry drives the preparation and useful properties of heterocyclic compounds
Download or read book Science of Synthesis N Heterocyclic Carbenes in Catalytic Organic Synthesis written by Steven P. Nolan and published by . This book was released on 2016-12 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book N heterocyclic Carbenes in Catalytic Organic Synthesis written by Steven Nolan and published by Thieme Chemistry. This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The field of N-heterocyclic carbenes, whether in transition-metal catalysis or organocatalysis, is rapidly evolving towards applications, but is also still very active on the catalyst development front. Significant advances have been made over the past two decades and the development of these reactions has dramatically improved the efficiency of organic synthesis. N-Heterocyclic carbene based catalysts are now widely applied in the area of synthesis of both natural products and therapeutic agents. Science of Synthesis: N-Heterocyclic Carbenes in Catalytic Organic Synthesis presents the most commonly used and significant metal- or non-metal-catalyzed reactions for modern organic synthesis. The basic principles and current state-of-the-art of the methods are covered. Scope, limitations, and mechanism of these reactions are discussed and key experimental procedures are included. Typical examples of target synthesis are often provided to show the utility and inspire further applications.
Download or read book Heterocycles from Carbenes and Nitrenes written by Michael P. Doyle and published by Springer Nature. This book was released on 2023-08-09 with total page 381 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides researchers in the fields of organic chemistry, organometallic chemistry and homogeneous catalysis with an overview of recent developments in the applications of reactions involving carbene and nitrene intermediates directed to the synthesis of heterocyclic compounds. Multiple pathways through which diverse heterocyclic compounds are accessed occur from a variety of carbene and nitrene precursors through C-H/X-H insertions, cycloadditions, ylide transformations, rearrangements, and cascade reactions. Catalytic processes that form metallo-carbenes and nitrenes offer unparalleled chemo-, regio-, and stereo-selectivities. Insights are provided into the scope of these methodologies and the inherent control of catalyst ligands on reaction selectivities.
Download or read book N Heterocyclic Carbenes in Catalytic Organic Synthesis Workbench Edition written by Steven Nolan and published by Thieme Chemistry. This book was released on 2017-06-14 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: These SOS volumes provide a user's guide to NHC chemistry and catalysis, thus facilitating the introduction of NHCs to novices and also helping to expand the repertoire of synthetic tools available to the more-advanced researcher, enabling the design of new catalysts and reactions. Volume 1 provides a detailed introduction to NHCs, with discussion of their architectures and steric and electronic properties. The synthesis of NHC precursors, NHCs themselves, and metal-NHC complexes is described. The use of NHCs in cross-coupling chemistry (carbon-carbon and carbon-heteroatom bond formation), C-H bond functionalization, and addition reactions to carbon-carbon multiple bonds is reviewed. Volume 2 covers the use of NHCs in the various types of metathesis reaction, polymerization, cyclization reactions, oxidation reactions, and carbonylation/carboxylation reactions. The use of NHCs in asymmetric transition-metal catalysis is highlighted, as are recyclable systems (biphasic, covalently immobilized, and ionically tagged systems), NHCs in flow chemistry, and recent advances in the use of NHCs in organocatalysis.
Download or read book N Heterocyclic Carbenes in Synthesis written by Steven P. Nolan and published by John Wiley & Sons. This book was released on 2006-12-13 with total page 319 pages. Available in PDF, EPUB and Kindle. Book excerpt: This first handbook to focus solely on the application of N-heterocyclic carbenes in synthesis covers metathesis, organocatalysis, oxidation and asymmetric reactions, along with experimental procedures. Written by leading international experts this is a valuable and practical source for every organic chemist.
Download or read book Organocatalytic Cycloadditions for Synthesis of Carbo and Heterocycles written by Prof. Min Shi and published by John Wiley & Sons. This book was released on 2018-03-27 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive resource to the development and recent progress of zwitterion-oriented cycloadditions promoted by organoamines, organophosphines, N-heterocyclic carbenes Organocatalytic Cycloadditions for Synthesis of Carbo- and Heterocycles offers a clear explanationto thedevelopment of and the information on the latest research pertaining to zwitterion-oriented cycloadditions promoted by organoamines, organophosphines, N-heterocyclic carbenes. The authors—noted experts in the field—include a comprehensive review to the investigations of the reaction mechanisms and explore the synthesis of different products from the same starting materials. Filled with illustrative examples and designed to be accessible, the text shows how to control the chemo-, regio- and stereoselectivity and explains the further design of novel cycloaddition reactions catalyzed by organoamines and organophosphines based on zwitterion-oriented synthetic strategy. This important text: Explains why the formation of carbo- and heterocycles is a key transformation in organic synthesis. Offers a clear description to the development of zwitterion-oriented cycloadditions promoted by organoamines, organophosphines, N-heterocyclic carbenes, and explores the latest research Contains the most current examples involving synthetic transformations of organocatalytic cycloadducts Includes contributions from noted experts in the field of organic synthesis Written for organic chemists, pharmaceutical chemists, chemists in industry, graduates, and librarians, Organocatalytic Cycloadditions for Synthesis of Carbo- and Heterocyclesis is the essential guide to the topic.
Download or read book N Heterocyclic Carbenes written by Steven P. Nolan and published by John Wiley & Sons. This book was released on 2014-07-07 with total page 690 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive reference and handbook covers in depth all major aspects of the use of N-heterocyclic carbene-complexes in organic synthesis: from the theoretical background to characterization, and from cross-coupling reactions to olefin metathesis. Edited by a leader and experienced scientist in the field of homogeneous catalysis and use of NHCs, this is an essential tool for every academic and industrial synthetic chemist.
Download or read book N Heterocyclic Carbenes written by Silvia Diez-Gonzalez and published by Royal Society of Chemistry. This book was released on 2016-11-04 with total page 637 pages. Available in PDF, EPUB and Kindle. Book excerpt: In less than 20 years N-heterocyclic carbenes (NHCs) have become well-established ancillary ligands for the preparation of transition metal-based catalysts. This is mainly due to the fact that NHCs tend to bind strongly to metal centres, avoiding the need of excess ligand in catalytic reactions. Also, NHC‒metal complexes are often insensitive to air and moisture, and have proven remarkably resistant to oxidation. This book showcases the wide variety of applications of NHCs in different chemistry fields beyond being simple phosphine mimics. This second edition has been updated throughout, and now includes a new chapter on NHC‒main group element complexes. It covers the synthesis of NHC ligands and their corresponding metal complexes, as well as their bonding and stereoelectronic properties and applications in catalysis. This is complemented by related topics such as organocatalysis and biologically active complexes. Written for organic and inorganic chemists, this book is ideal for postgraduates, researchers and industrialists.
Download or read book Asymmetric Domino Reactions written by Hélène Pellissier and published by Royal Society of Chemistry. This book was released on 2013 with total page 519 pages. Available in PDF, EPUB and Kindle. Book excerpt: Accessible references for researchers and industrialists in this exciting field, covering both developments and applications of catalysis.
Download or read book Au Catalyzed Synthesis and Functionalization of Heterocycles written by Marco Bandini and published by Springer. This book was released on 2018-06-07 with total page 289 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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
Download or read book Chiral Ferrocenes in Asymmetric Catalysis written by Li-Xin Dai and published by John Wiley & Sons. This book was released on 2010-02-01 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book meets the long-felt need for a reference on ferrocenes with the focus on catalysis. It provides a thorough overview of the synthesis and characterization of different types of chiral ferrocene ligands, their application to various catalytic asymmetric reactions, and versatile chiral materials as well as drug intermediates synthesized from them. Written by the "who's who" of ferrocene catalysis, this is a guide to the design of new ferrocene ligands and synthesis of chiral synthetic intermediates, and will thus be useful for organic, catalytic and synthetic chemists working in academia, industrial research or process development.
Download or read book N heterocyclic Carbenes with an Oxazoline Unit written by Nathanaëlle Schneider and published by . This book was released on 2008 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of N heterocyclic Carbene Catalyzed C C Bond Cleavage and C C Bond Formation Reactions written by Thomas Broja and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book N Heterocyclic Carbenes in Transition Metal Catalysis and Organocatalysis written by Catherine S.J. Cazin and published by Springer. This book was released on 2010-11-04 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: N-Heterocyclic Carbenes in Transition Metal Catalysis and Organocatalysis features all catalytic reactions enabled by N-heterocyclic carbenes (NHCs), either directly as organocatalysts or as ligands for transition metal catalysts. An explosion in the use of NHCs has been reported in the literature during the past seven years making this comprehensive overview highly apropos. The book begins with an introductory overview of NHCs which could have been subtitled all you need to know about NHCs. The main body of the book is dedicated to applications of NHCs in catalysis. In addition to the success stories of NHCs in metathesis, NHCs in cross coupling and more recently NHCs in organocatalysis, all other less publicized areas are also covered. As the success of NHCs is generally attributed to their potential to stabilize metal centres, the inclusion of a chapter on the decomposition of NHC catalysts is pertinent. The book closes with a chapter describing the applications of NHCs in industrial processes, which is the first coverage of its kind, and brings a unique industrial context to this book. Included in this book: Historical aspects of NHCs Synthetic pathways to NHC precursors, free NHCs and complexes Methods of characterisation of NHCs and related complexes Electronic properties of NHCs Steric properties of NHCs and models for their description NHCs for metathesis and cross-coupling reactions NHCs as organocatalysts NHC Transition-Metal mediated oxidations, additions to multiple bonds, polymerisation and oligomerisation, cyclisations, direct arylations, reactions involving CO, C-F and C-H bond activation, ... Decomposition of NHC-containing catalysts Industrial applications involving NHC-containing catalysts N-Heterocyclic Carbenes in Transition Metal Catalysis and Organocatalysis provides a fresh view of NHCs since most contributors are young emerging researchers in the field of homogeneous catalysis using NHCs. This group of contributors is complemented by highly established academic researchers and an industrialist. This book is comprehensive, from the basic features of NHCs to the latest advances, hence it is suitable for both the novice and the expert.
