Chemie Der Heterocyclen
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Kurze Einf Hrung In Die Chemie Der Heterocyclen
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Author : Ulrich Wolf
language : de
Publisher: Springer-Verlag
Release Date : 2013-03-09
Kurze Einf Hrung In Die Chemie Der Heterocyclen written by Ulrich Wolf and has been published by Springer-Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-03-09 with Technology & Engineering categories.
Diese einführende Darstellung beschränkt sich auf die Darstellung der wesentlichen heterocyclischen Grundtypen und deren Eigenschaften und Synthesen. Ausgewählte Beispiele aus der aktuellen Literatur sollen das Interesse am selbständigen weiteren Studium wecken.
Chemie Der Heterocyclen
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Author : Alan R. Katritzky
language : de
Publisher: Springer-Verlag
Release Date : 2013-03-13
Chemie Der Heterocyclen written by Alan R. Katritzky and has been published by Springer-Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-03-13 with Science categories.
Die entsprechenden Dbersichten in Kapitel 4 findet man in den Abschnitten 4.II, 4.II1 und 4.IV. 2. Grundlagen der Elektronentheorie der organischen Chemie* Die organische Chemie hat sich heute so weit entwickelt, daB man die groBe Mehrzahl aller Reaktionen durch eine Aufeinanderfolge einzelner Schritte erklaren und korrelieren kann, wobei sich diese Schritte ihrer seits in wenige einfache, grundlegende Reaktionstypen unterteilen lassen. Bei jeder organischen Reaktion werden Bindungen gel6st und/oder gebildet. Eine chemische Bindung besteht aus zwei Elektronen, die zwei Atomen gemeinsam angeh6ren, und sie wird gebildet (oder ge16st) auf dreierlei Weise: 1. Eines der beiden Atome tragt beide Elektronen zur Bindung bei, entweder von einem einsamen Elektronenpaar oder von einer anderen Bindung, haufig einer Mehrfachbindung (die gekriimmten Pfeile deuten die Verschiebung eines Elektronenpaares an). Die Atome erhalten dabei form ale Ladungen. Reaktionen dieses Typs, die man verallgemeinert "ionische Reaktionen" nennt, sind die bei weitem wichtigsten. Das Atom, Molekiil oder Ion, welches das Elektronenpaar liefert, wird als nuc1eophiles Reagens bezeichnet und dasjenige, welches die Elektronen empfangt, als elektrophiles Reagens. 2. Jedes Atom tragt ein Atom zur Bindung bei (wobei die punktierten Pfeile die Verschiebung eines einzelnen Elektrons andeuten). Reaktionen dieses Typs sind als radikalische Reaktionen bekannt, denn mindestens einer der Reaktionspartner oder Reaktions produkte muB ein freies Radikal sein, d. h. ein ungepaartes Elektron enthalten.
Flow Chemistry For The Synthesis Of Heterocycles
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Author : Upendra K. Sharma
language : en
Publisher: Springer
Release Date : 2018-06-20
Flow Chemistry For The Synthesis Of Heterocycles written by Upendra K. Sharma and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-06-20 with Science categories.
This volume provides an overview of recent developments and scope in the use of flow chemistry in relevance to heterocyclic synthesis. The heterocyclic ring is the most prominent structural motif in the vast majority of natural products as well as pharmaceutical compounds since this facilitates tuneable interactions with the biological target besides conferring a degree of structural and metabolic stability. In recent times, flow chemistry has heralded a paradigm shift in organic synthesis as it offers several unique advantages over conventional methods like drastic acceleration of sluggish transformations, enhanced yields, cleaner reactions etc and is gradually gaining a lot of attention among organic chemist worldwide. Given the importance of heterocycles in natural products, medicinal chemistry and pharmaceuticals, this is a well warranted volume and complements the previous volume of Topics in Organometallic Chemistry ‘Organometallic Flow Chemistry’. This volume offers a versatile overview of the topic, besides discussing the recent progress in the flourishing area of flow chemistry in relevance to heterocyclic chemistry; it will also help researchers to better understand the chemistry behind these reactions. This in turn provides a platform for future innovations towards the designing of novel transformations under continuous flow. Thus, this volume will appeal to both the novices in this field as well as to experts in academia and industry.
Advances In Heterocyclic Chemistry
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Author :
language : en
Publisher: Elsevier
Release Date : 1999-07-26
Advances In Heterocyclic Chemistry written by and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999-07-26 with Science categories.
Established in 1960, Advances in Heterocyclic Chemistry is the definitive serial in the area--one of great importance to organic chemists, polymer chemists, and many biological scientists. Written by established authorities in the field, the comprehensive reviews combine descriptive chemistry and mechanistic insight to yield an understanding of how the chemistry drives the properties.Degenerate ring transformations of heterocycles are classified as reactions in which a heterocyclic system is converted into the same heterocyclic system. This monograph covers an authoritative, comprehensive overview of a host of degenerate ring transformations in five- and six-membered heterocycles. It shows how by the use of 15N-labeled, 13C-labeled, or selectively substituted compounds these degenerate rign transformations can be discovered and how most of the results can be explained by the Addition Nucleophile, Ring Opening, and Ring Closure [ANRORC] mechanism. Another main topic of the monograph is the occurrence of degenerate ring transformations.
Multicomponent Reactions Towards Heterocycles
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Author : Erik Van der Eycken
language : en
Publisher: John Wiley & Sons
Release Date : 2022-03-21
Multicomponent Reactions Towards Heterocycles written by Erik Van der Eycken and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-03-21 with Science categories.
Presents a wide-ranging overview of essential topics and recent advances in MCR chemistry Heterocycles are a central component in natural product chemistry, pharmaceuticals, agrochemicals, and material science. New synthetic methodologies integrating the sequencing of multicomponent reactions (MCRs) are today being used for the rapid synthesis of diversified heterocycles in just one step. Multicomponent Reactions towards Heterocycles presents an up-to-date summary MCR chemistry with a focus on the conjugation between modern synthetic methodologies and MCRs. Featuring contributions by leaders in the field, this comprehensive resource highlights applications of MCRs in natural products and intermediate synthesis, discusses current trends and future prospects in MCR chemistry, outlines novel multicomponent procedures, and more. The authors provide the practical information required for designing new reaction strategies and mechanisms, covering topics including MCR-based green synthetic methods, cyclization and cycloaddition reactions, heterocycle multicomponent syntheses in a continuous flow, catalytic alkynoyl generation, MCR synthesis of saturated heterocycles, and C–H functionalization and multicomponent reactions. Provides a thorough overview of heterocycles as input in multicomponent reactions Discusses recent advances in the field of MCR chemistry and progress in the synthesis and functionalization of heterocycles Demonstrates the use of MCRs to simplify synthetic design and achieve complexity and diversity in novel bioactive molecules Highlights examples of multicomponent polymerizations, target-oriented synthesis, and applications of MCR in medicinal chemistry Explains the methodology of using on-resin MCRs to produce heterocycle compounds Illustrating the key role of MCRs towards heterocycles in natural product synthesis, drug discovery, organic synthesis, and other applications, Multicomponent Reactions towards Heterocycles is required reading for synthetic chemists in academia and industry alike.
Structure Bonding And Reactivity Of Heterocyclic Compounds
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Author : Frank De Proft
language : en
Publisher: Springer
Release Date : 2014-11-03
Structure Bonding And Reactivity Of Heterocyclic Compounds written by Frank De Proft and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-11-03 with Science categories.
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.
Heterocycles In Bio Organic Chemistry
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Author : J. Bergman
language : en
Publisher:
Release Date : 1991
Heterocycles In Bio Organic Chemistry written by J. Bergman and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Science categories.
This book will contribute to a better understanding of the mechanism of action of bioheterocycles in bioprocesses.
The Chemistry Of Heterocycles
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Author : Theophil Eicher
language : en
Publisher: Wiley-VCH
Release Date : 2003-08-15
The Chemistry Of Heterocycles written by Theophil Eicher and has been published by Wiley-VCH this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003-08-15 with Science categories.
The second edition of this "classic" among textbooks on heterocycle chemistry. Here, Theophil Eicher and Siegfried Hauptmann, both renowned authors of many successful such works, present all the important aspects of this fascinating field in a clear manner. - completely revised - enlarged - numerous Q&As help readers to deepen their knowledge - covers the very latest topics, such as metal-catalyzed coupling reactions - systematic substance nomenclature - comprehensive overview of all the important substance classes. A must-have for advanced students of organic chemistry as well as for chemists looking for a quick overview of the field.
Chemie Der Heterocyclen
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Author : Eicher
language : de
Publisher:
Release Date : 1994
Chemie Der Heterocyclen written by Eicher and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with categories.
Microwave Assisted Synthesis Of Heterocycles
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Author : Erik van der Eycken
language : en
Publisher: Topics in Heterocyclic Chemistry
Release Date : 2006-03-20
Microwave Assisted Synthesis Of Heterocycles written by Erik van der Eycken and has been published by Topics in Heterocyclic Chemistry this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006-03-20 with Science categories.
The book comprises reviews on various topics of carbon nanotube research from specialists in the field, together with reports on on-going research. Both are intended to give a detailed picture of the remarkable properties of these one-dimensional nanostructures. Particular attention is paid to the synthesis, characterization, properties, and application of nanotubes. The book will be an indispensable introduction for the newcomers in the field as well as a valuable update for researchers in the field, for it contains the most recent developments.