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Author: Henri Ulrich
Publisher: Elsevier
ISBN: 0323162762
Category : Science
Languages : en
Pages : 375
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Book Description
Cycloaddition Reactions of Heterocumulenes reviews cycloaddition reactions, particularly on hetercocumulenes having "four-electron" bonds. This book discusses the chemical relationship among the various classes of heterocumulenes, including their chemical reactivity which ranges from highly reactive species to nearly inert compounds. This text also investigates the nucleophilic reactions of ketenes and isocyanates with suitable substrates, and if possible, correlates available data with the reactivity of these species in cycloaddition reactions. This book also investigates the cycloaddition reactions of carbon suboxide and other aspects of its chemistry due to the presence of many other interrelated reactions. The synthetic organic chemist should also investigate the application of isocyanate reactions associated with the cumulative double bonds. This text investigates carbodiimides as useful reagents for peptide synthesis, and notes that the stability of carbodiimides increases significantly with sterical hindrance around the cumulative double bond system. This book discusses three compounds that have a central electrophilic carbon atom, namely, carbon dioxide, carbonyl sulfide, and carbon disulfide. The book also describes the cycloaddition reactions of sulfenes, of N-sulfinylamines, of N-sulfinylsulfonamides, and of sulfurdiimides. This book can prove useful for researchers, technicians, and scientists whose works involve organic chemistry, analytical chemistry, and other related fields of chemistry.
Author: Henri Ulrich
Publisher: Elsevier
ISBN: 0323162762
Category : Science
Languages : en
Pages : 375
Get Book Here
Book Description
Cycloaddition Reactions of Heterocumulenes reviews cycloaddition reactions, particularly on hetercocumulenes having "four-electron" bonds. This book discusses the chemical relationship among the various classes of heterocumulenes, including their chemical reactivity which ranges from highly reactive species to nearly inert compounds. This text also investigates the nucleophilic reactions of ketenes and isocyanates with suitable substrates, and if possible, correlates available data with the reactivity of these species in cycloaddition reactions. This book also investigates the cycloaddition reactions of carbon suboxide and other aspects of its chemistry due to the presence of many other interrelated reactions. The synthetic organic chemist should also investigate the application of isocyanate reactions associated with the cumulative double bonds. This text investigates carbodiimides as useful reagents for peptide synthesis, and notes that the stability of carbodiimides increases significantly with sterical hindrance around the cumulative double bond system. This book discusses three compounds that have a central electrophilic carbon atom, namely, carbon dioxide, carbonyl sulfide, and carbon disulfide. The book also describes the cycloaddition reactions of sulfenes, of N-sulfinylamines, of N-sulfinylsulfonamides, and of sulfurdiimides. This book can prove useful for researchers, technicians, and scientists whose works involve organic chemistry, analytical chemistry, and other related fields of chemistry.
Author: Albert Padwa
Publisher: John Wiley & Sons
ISBN: 0471461369
Category : Science
Languages : en
Pages : 952
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Book Description
Dipolar cycloaddition reactions have found many useful applications in chemistry, particularly with respect to the synthesis of compounds with new chiral centers. Synthetic Applications of 1,3-Dipolar Cycloaddition Chemistry Toward Heterocycles and Natural Products updates the popular 1984 edition, featuring the advances made over the past twenty years and focusing on synthetic applications.
Author: Henri Ulrich
Publisher: John Wiley & Sons
ISBN: 9780470747933
Category : Science
Languages : en
Pages : 562
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Book Description
Cumulenes are organic molecules with two or more cumulative (consecutive) double bonds. Their reactions often proceed at room temperature, with or without a catalyst, and are stereospecific, giving the reaction products in high yields – features characteristic of “click reactions”. Cumulenes in Click Reactions presents a comprehensive list of cumulene systems and their reactions, with an emphasis on their “click-like” nature. The chapters are structured according to the number of carbon atoms in the system, including coverage of: introduction to the chemistry of cumulenes one-carbon cumulenes: sulfines, sulfenes, thiocarbonyl S-imides, thiocarbonyl S-sulfides, and 1-aza-2-azoniaallene salts two-carbon cumulenes: carbon oxides, carbon sulfides, carbon nitrides (isocyanates, isothiocyanates, and carbodiimides), phosphaallenes, and diarsaallenes 1,2-dicarbon cumulenes: ketenes, thioketenes, ketenimines, 1-silaallenes, 1-phosphaallenes, and other metal allenes 1,3-dicarbon cumulenes: thiocarbonyl S-ylides, 2-azaallenium salts, 1-oxa-3-azoniabutatriene salts, 1-thia-3-azoniabutatriene salts, and phosphorous ylides 1,2,3-tricarbon cumulenes: allenes, butatrienes, higher cumulenes and heterobutatrienes noncarbon cumulenes: azides, triazaallenium salts, sulfur oxides, sulfur nitrides, N-sulfinylamines, sulfurdiimides, and dithionitronium cation Cumulenes in Click Reactionsis an essential guide for researchers and advanced students in academia and research working in synthetic organic, inorganic and bioorganic chemistry.
Author: John P. Wolfe
Publisher: Springer
ISBN: 3642388809
Category : Science
Languages : en
Pages : 276
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Book Description
Synthesis of Saturated Heterocycles via Metal-Catalyzed Alkene Carboamination or Carboalkoxylation Reactions, by John P. Wolfe Synthesis of Saturated Heterocycles via Metal-Catalyzed Alkene Diamination, Aminoalkoxylation, or Dialkoxylation Reactions, by Sherry R. Chemler Synthesis of Heterocycles via Metal-Catalyzed Wacker-Type Oxidative Cyclization Reactions of Alkoxy- or Amino-Alkenes, by Wanbin Zhang Synthesis of Saturated Heterocycles via Metal-Catalyzed Hydroamination or Hydroalkoxylation Reactions, by Lisa D. Julian Synthesis of Saturated Heterocycles via Metal-Catalyzed Allylic Alkylation Reactions, by Aaron Aponick Synthesis of Heterocycles via Metal-Catalyzed Cascade/Domino Reactions that Generate a C–N or C–O Bond, by Mark Lautens Synthesis of Saturated Heterocycles via Metal-Catalyzed Formal Cycloaddition Reactions that Generate a C–N or C–O Bond, by Jerome Waser
Author: Vishnu Ji Ram
Publisher: Elsevier
ISBN: 0081011911
Category : Science
Languages : en
Pages : 504
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Book Description
Heterocycles are ubiquitously present in nature and occupy a unique place in organic chemistry as they are part of the DNA and haemoglobin that make life possible. The Chemistry of Heterocycles covers an introduction to the topic, followed by a chapter on the nomenclature of all classes of isolated, fused and polycyclic heterocycles. The third chapter delineates the highly strained three membered N,O and S containing aromatic and non-aromatic heterocycles with one and more than one similar and dissimilar heteroatom. The four-membered heterocycles are abundantly present in various natural and synthetic products of pharmacological importance. This chapter describes the natural abundance, synthesis, chemical reactivity, structural features and their medicinal importance. This class of compounds are present as sub-structures in penicillin and cytotoxic Taxol. Lastly, a chapter on the natural abundance, synthesis, chemical reactivity and pharmacological importance of 5-membered heterocycles with N,O,S heteroatom is covered. The chemistry of heterocycles with mixed heteroatom such as, N-S, N-O, N-S etc. is also described. - Gives in-depth, clear information about various systems of nomenclature along with widely acceptable IUPAC system for naming various classes of heterocycles - Provides complete information about natural occurrences, synthesis, chemical reactivity, pharmacological importance of heterocycles and their application in material science - Highly relevant for graduate students and researchers, providing updated information about various isolated and fused N,O and,S containing heterocycles
Author: G Chiurdoglu
Publisher: Elsevier
ISBN: 0323157319
Category : Science
Languages : en
Pages : 293
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Book Description
Conformational Analysis: Scope and Present Limitations contains the proceedings of the Brussels International Symposium on Conformational Analysis held in Brussels, Belgium, in September 1969. The papers focus on the theoretical aspects and applications of conformational analysis, such as those concerning the aliphatic and especially the cyclic series. Topics covered include the geometry of five-membered rings; conformational transmission in steroids; conformational aspects of N-quaternization; and applications of nuclear magnetic resonance spectrometry in conformational studies of cyclohexane derivatives. This book is comprised of 20 chapters and begins with a discussion on the conformational aspects of some five-membered ring compounds based mainly on observed (diffraction methods) and calculated torsional angles. The reader is then introduced to nuclear magnetic resonance studies of the conformations and conformational barriers in cyclic molecules; conformational studies of six-membered heterocycles; conformational transmission in steroids; and solvolytic cyclizations involving double bonds. The remaining chapters explore the conformational analysis of methylcyclohexane, cyclohexane systems, and carbonium ions; conformations of membrane-active cyclodepsipeptides; energetics of isomeric transition states and competitive reaction pathways in conformational analysis; and conformational aspects of the reaction of the 1-methylcyclodecane-l,6-diols with acid. This monograph will be of interest to organic chemists.
Author: Robert H. Dewolfe
Publisher: Elsevier
ISBN: 0323163238
Category : Science
Languages : en
Pages : 569
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Book Description
Carboxylic Ortho Acid Derivatives: Preparation and Synthetic Applications discusses the principal classes of ortho acid derivatives and their preparation, properties, and reactions. The book is a critical survey and attempts to collate literature regarding the wide array of information on ortho acid derivatives to be of use to chemists studying different sorts of problems. The text is divided into seven chapters, where Chapter 1 begins with a discussion of the general concepts of carboxylic ortho esters, their synthesis, and properties. Chapters 2 to 4 tackle reactions of ortho esters that result to different bonds and bond formations such as (a) carbon-oxygen and carbon-halogen bond, (b) carbon-nitrogen or carbon-phosphorus, and (c) carbon-carbon or carbon-hydrogen bond formation. Chapter 5 discusses the synthesis, properties, and applications of carbohydrate ortho esters. Related compounds and their properties, preparation, and chemical transformations are the topic of Chapters 6 and 7. Some of these compounds are trithioorthocarboxylates, tetrathioorthocarbonates, and amide acetals. The book is a valuable reference to students or anyone else interested in chemistry.
Author: Samuel McManus
Publisher: Elsevier
ISBN: 0323146279
Category : Science
Languages : en
Pages : 552
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Book Description
Organic Chemistry: A Series of Monographs, Volume 26: Organic Reactive Intermediates focuses on the study of reactive intermediates. This book discusses the methods of formation and investigation, factors affecting the stability, and reactions of the intermediate. Other topics include the formation and reaction of free radicals; kinetic aspects of free-radical chain reactions; electronic states and structures of carbenes; and formation of transient carbenes and carbenoids in solution. The intermediacy of nitrenes in reactions; electronic structure and spectra; methods of investigating carbonium ions; and reactions of carbonium ions are also elaborated. This publication likewise covers the preparation of carbanions; factors affecting the stability of carbanions; reactions involving radical ions; and methods of investigating arynes. This volume serves as a textbook for the first graduate-level course, as well as a reference for industrial chemists interested in organic reaction mechanisms.
Author: Pierre Crabbe
Publisher: Elsevier
ISBN: 0323149510
Category : Science
Languages : en
Pages : 360
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Book Description
Prostaglandin Research reviews the status of prostaglandin research, with particular emphasis on chemistry. This book highlights the role of scientific research in society in attempting to find drugs, with potential application to therapy, the chief impetus for prostaglandin research. This volume is organized into seven chapters and begins with an overview of the origin and properties of prostaglandins and then outlines the stage of research in the area of biosynthesis of natural entities, especially endoperoxides and thromboxanes. The reader is then introduced to a rich source of natural prostaglandins, the gorgonian Plexaura homomalla, and the pharmacology of prostaglandins. The physical methods used in prostaglandin research are considered, along with the chemistry of natural and modified prostaglandins. This book is aimed at experts in the field, as well as scientists with a general interest in chemistry and biology.
Author: R. Alan Jones
Publisher: Academic Press
ISBN: 1483218473
Category : Science
Languages : en
Pages : 539
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Book Description
The Chemistry of Pyrroles, Volume 34 aims to provide a comprehensive survey of the synthesis of simple pyrroles and to present, wherever possible, a mechanistic and theoretical rationale for the multitude of reactions known for pyrroles. The book discusses the structure and reactivity of pyrrole; the synthesis of the pyrrole ring; and the electrophilic substitution of the pyrrole ring. The text also describes the oxidation and reduction of the pyrrole ring; the rearrangement and addition reactions; and the ketones, aldehydes, and carboxylic acid derivatives of pyrrole. Alkylpyrroles and related compounds; hydroxy- and aminopyrroles and related compounds; and azafulvenes are also considered. The book further tackles the physico-organic properties of pyrrole. Chemists and researchers of pyrrole chemistry will find the text invaluable.
