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This book examines methods particularly well suited for either a- or b-C-glycoside formation. It helps field workers quickly select the best method for synthesizing a particular type of C-glycoside. The use of C-glycosides as synthons in natural product synthesis is also addressed.
Many laboratories were reluctant at first to embrace dianion chemistry as part of the standard reaction repertoire. Today, however, researchers can comfortably draw upon the dianion literature to choose an abundance of reagents and strategies that are reliable, effective, and, in many cases, the best answer to a synthetic problem. This interesting book introduces, surveys, and consolidates carbon-based dianion chemistry. Chapter 1 serves as an introduction and as an index of the various dianions covered in the book. Chapters 2 through 5 cover the ensemble of dianion types designated by their first deprotonation site. Each chapter contains an experimental section that explains relevant protocols.
This book brings together the theoretical, commercial, and practical aspects of chirality and biological activity of drugs and acts as a ready reference for the effects of enantiomers of drug substances.
The concept of concerted mechanisms was formulated nearly 90 years ago and virtually all general organic chemistry texts mention it. Until now, however, no monograph has addressed the concept explicitly. Over the last two decades, substantial advancements made in the development of precise methods for elucidating concerted mechanisms have heightened the need for a comprehensive text on the subject. Concerted Organic and Bio-organic Mechanisms gathers the salient materials related to this emerging field into a single text. It sets forth the precise definition of concertedness-along with working sub-definitions-and describes rigorous experimental tools chemists can use to diagnose the existence or absence of concerted mechanisms. Advances in our understanding of concerted mechanisms lead to further questions. Concerted Organic and Bio-organic Mechanisms provides the background and the tools researchers need to consider these important questions and further advance the frontiers of reactions, synthesis, and catalysis.
Lewis acids provide inexpensive access to elaborated molecules obtained with high selectivities (regio-, stereo-, and enantioselectivity). Lewis Acids and Selectivity in Organic Synthesis is the first book to deal with these new and promising roles of Lewis acids. The book begins with general considerations on Lewis acids and a description of Lewis acid-carbonyl complexes, which are involved in most of the reactions described: ene reactions, allylsilane and allyltin addition to carbonyl compounds, addition of nucleophiles to acetals, conjugated addition of allylsilanes and allyltins to unsaturated carbonyl compounds (Sakurai reaction), and Diels-Alder reaction. Subsequent chapters examine these issue in detail, with special attention given to the way Lewis acids induce diastereo- and enantioselectivity. The extensive use of schemes (approximately 1000) ensures rapid visual uptake of the information. Lewis Acids and Selectivity in Organic Synthesis serves as a valuable source of information for all who face the challenge of selectivity in organic synthesis.
Cyclization Reactions provides a quick update of the latest advances in cyclization reactions. It covers the basic principles of cyclization chemistry, emphasizing practical applications. Chapters are organized according to the different cyclization intermediates-cationic, radical, anionic, and metal complex intermediates. The last chapter covers macrolactonization, vicinal tricarbonal, and Bergman (enediyne) reactions, which are of particular interest today. More than 2,600 structures illustrate key concepts throughout the book. Various cyclizations are organized into mechanistic groups to help researchers choose and change between methods when searching for maximum efficiency in synthesis. Critical coverage of the literature up to 1992 is provided. Cyclization Reactions is essential reading for anyone involved in the synthesis of ring compounds or who is seeking a rapid overview of the field. Newcomers as well as experienced researchers will benefit from this book. It also is excellent reference material for students at the advanced undergraduate and graduate levels.
Organozinc reagents are used extensively in organic synthesis to find useful pathways to organic products. Illustrated and tabulated with over 950 equations, schemes, tables, and figures, Organozinc Reagents in Organic Synthesis provides an overall picture of the chemistry of organozinc compounds. Written by a professor of organic chemistry, the book familiarizes the reader with the reactions involving organozinc reagents that have general usefulness in synthesis. Emphasis is placed on preparation methods and reactivity of organozinc reagents. Reactions are summarized in equations and schemes, making it easy for you to see the characteristics of each type of reaction.
Describes methods for introducing fluorine and small fluorine-containing substituents into aromatic rings Considers traditional and modern synthetic methods, including industrial processes Focuses on the synthesis of selectively fluorinated aromatic molecules that represent an increasingly important class of intermediates Examines both historical development and future trends in this increasingly important area of chemistry
A blend of theory and practical advice, Modern NMR Techniques for Synthetic Chemistry illustrates how NMR spectroscopy can be used to determine the abundance, size, shape, and function of organic molecules. It provides you with a description the NMR technique used (more pictorial than mathematical), indicating the most common pulse sequences, some practical information as appropriate, followed by illustrative examples. This format is followed for each chapter so you can skip the more theoretical details if the practical aspects are what interest you. Following a discussion of basic parameters, the book describes the utility of NMR in detecting and quantifying dynamic processes, with particul...
The importance of capillary electrophoresis (CE) as an analytical tool has increased dramatically over the last ten years. It has changed from being an exploratory technique, mainly of academic interest, to one that is applied to solve "real" analytical problems. CE is easily adapted to its various modes of operation, often requiring little more than a change of the buffer solution, and is quickly becoming the preferred technique when analyzing minute amounts of available material. Featuring new chapters on CE analysis of inorganic ions and carbohydrates, the new edition of Capillary Electrophoresis not only presents this method as an academic tool, but also provides applications for solving...