Modern Methods in Stereoselective Aldol Reactions

Advanced tools for developing new functional materials and applications in chemical research, pharmaceuticals, and materials science Cycloadditions are among the most useful tools for organic chemists, enabling them to build carbocyclic and heterocyclic structures. These structures can then be used to develop a broad range of functional materials, including pharmaceuticals, agrochemicals, dyes, and optics. With contributions from an international team of leading experts and pioneers in cycloaddition chemistry, this book brings together and reviews recent advances, trends, and emerging research in the field. Methods and Applications of Cycloaddition Reactions in Organic Syntheses focuses on two component cycloadditions, with chapters covering such topics as: N1 unit transfer reaction to C–C double bonds [3+2] Cycloaddition of α, β-unsaturated metal-carbene complexes Formal [3+3] cycloaddition approach to natural product synthesis Development of new methods for the construction of heterocycles based on cycloaddition reaction of 1,3-dipoles Cycloreversion approach for preparation of large π-conjugated compounds Transition metal-catalyzed or mediated [5+1] cycloadditions Readers will learn methods for seamlessly executing important reactions such as Diels-Alder and stereoselective dipolar reactions in order to fabricate heterocyclic compounds, natural products, and functional molecules. The book not only features cutting-edge topics, but also important background information, such as the contributors’ process for developing new methodologies, to help novices become fully adept in the field. References at the end of each chapter lead to original research papers and reviews for facilitating further investigation of individual topics. Covering the state of the science and technology, Methods and Applications of Cycloaddition Reactions in Organic Syntheses enables synthetic organic chemists to advance their research and develop new functional materials and applications in chemical research, pharmaceuticals, and materials science.

This handbook and ready reference highlights a couple of basic aspects of recently developed new methods in modern crop protection research, authored by renowned experts from major agrochemical companies. Organized into four major parts that trace the key phases of the compound development process, the first section addresses compound design, while the second covers newly developed methods for the identification of the mode of action of agrochemical compounds. The third part describes methods used in improving the bioavailability of compounds, and the final section looks at modern methods for risk assessment. As a result, the agrochemical developer will find here a valuable toolbox of advanced methods, complete with first-hand practical advice and copious examples from current industrial practice.

The book consists of a brief introduction, a foreward provided by professor Danishefsky of Columbia University, and about 14 – 16 chapters, each written by one or two eminent scholars/authors describing their recent research in the area of either domino reactions or intramolecular rearrangements in carbohydrate chemistry. Three or four chapters will be reviews. The domino (cascade, tandem) reactions are always intramolecular. They are usually very fast, clean and offer highly complex structures in a one pot process. Intramolecular rearrangements offer very similar advantages and often lead to highly complex products as well. Although many recently isolated carbohydrates fulfill various sophisticated functions, their structures are often very complex. The editors cover the broadest scope of novel methodologies possible. All the synthetic and application aspects of domino/cascade reactions are explored in this book. A second theme that will be covered is intramolecular rearrangement, which is also fast, stereoselective, and often constitutes one or more steps of domino /cascade process. Selected examples of intramolecular rearrangements are presented. Together, both processes offer an elegant and convenient approach to the synthesis of many complex molecules, which are normally difficult to synthesize via alternative routes. It appears that domino and intramolecular rearrangements are ideally suited to synthesize certain specific modified monosaccharides. What is particularly important is that both processes are intermolecular and almost always yield products with very well-defined stereochemistry. This high definition is absolutely crucial when synthesizing advanced, modified mono and oligosaccharides. The choice of contributors reflects an emphasis on both therapeutic and pharmacological aspects of carbohydrate chemistry.

The fields of glycochemistry and glycoscience are rich and varied and where much can be learned from Nature. As Nature is not always able to produce carbohydrates in quantities useful for not only in research but also as therapeutic agents, new ways need to be found to optimize the yield. This book presents an overview of the latest developments in the field of carbohydrates, ranging from de-novo approaches via cyclodextrin chemistry to the synthesis of such highly complex glycoconjugates as glycosphingolipids and GPI anchors. The main emphasis remains on the synthetic aspects making the book an excellent source of information for those already involved in carbohydrate chemistry, as well as for those organic chemists who are beginners in this field. Equally of interest to synthetic chemists, as well as medicinal chemists and biochemists.

While rust is an unwanted oxidation reaction, there are also many other useful oxidation reactions that are extremely important and number among the most commonly used reactions in the chemical industry. This completely revised, updated second edition now includes additional sections on industrial oxidation and biochemical oxidation. Edited by one of the world leaders in the field, high-quality contributions cover every important aspect from classical to green chemistry methods: – Recent Developments in Metal-catalyzed Dihydroxylation of Alkenes – Transition Metal-Catalyzed Epoxidation of Alkenes – Organocatalytic Oxidation. Ketone-Catalyzed Asymmetric Epoxidation of Alkenes and Synthetic Applications – Catalytic Oxidations with Hydrogen Peroxide in Fluorinated Alcohol Solvents – Modern Oxidation of Alcohols using Environmentally Benign Oxidants – Aerobic Oxidations and Related Reactions Catalyzed by N-Hydro xyphthalimide – Ruthenium-Catalyzed Oxidation for Organic Synthesis – Selective Oxidation of Amines and Sulfides – Liquid Phase Oxidation Reactions Catalyzed by Polyoxometalates – Oxidation of Carbonyl Compounds – Manganese-Catalyzed Oxidation with Hydrogen Peroxide – Biooxidation with Cytochrome P450 Monooxygenases By providing an overview of this vast topic, the book represents an unparalleled aid for organic, catalytic and biochemists working in the field.

At the very latest, with the award of the 2001 Nobel Prize for work on asymmetric oxidation, there has been a need for a comprehensive book on such methods. Edited by J.-E. Backvall, one of the world's leaders in the field, this book fills that gap by covering the topic, from classical to green chemistry methods. He has put together a plethora of well-established authors from all over the world who cover every important aspect in high-quality contributions – whether aerobic oxidation or transition metal-catalyzed epoxidation of alkenes. By providing an overview of this huge topic, this book represents an unparalleled aid for any chemist working in the field. Chapters include: Recent Developments in the Osmium-Catalyzed Dihydroxylation of Olefins Transition Metal-Catalyzed Epoxidation of Alkenes Organocatalytic Oxidation – Ketone-Catalyzed Asymmetric Epoxidation of Olefins Modern Oxidation of Alcohols using environmentally Benign Oxidants Aerobic Oxidations and Related Reactions Catalyzed by N-Hydroxyphthalimide Ruthenium-Catalyzed Oxidation of Alkenes, Alcohols, Amines, Amides, b-Lactams, Phenols, and Hydrocarbons Selective Oxidations of Sulfides and Amines Liquid Phase Oxidation Reactions Catalyzed by Polyoxometalates Oxidation of Carbonyl Compounds Mn-catalysed Oxidation with Hydrogen Peroxide

Organic compounds containing amino groups are at the center of modern organic chemistry, and are widely used in the pharmaceutical industry, crop protection, natural product chemistry, and in advanced materials. Modern methods for the introduction of the amino group are therefore of major importance to synthetic chemists and product developers. Over the last decade, many methods have been developed to generate new C-N bonds. At the same time, the pharmaceutical and chemical industry was rapidly moving away from the development of racemic compounds to the direct synthesis of enantiomerically pure materials. The articles of this book, written by internationally recognized experts, thus focus on asymmetric synthesis. The most recent catalytic amination methods have particularly revolutionized the chemistry of amino compounds – and you find them all in this first comprehensive overview.

Today, arylation methods are belonging to the most important reaction types in organic synthesis. Lutz Ackermann, a young and ambitious professor has gathered a number of top international authors to present the first comprehensive book on the topic. Starting from a historical review, the book covers hot topics like Palladium-catalyzed arylation of N-H and alpha-C-H-acidic Bonds, Copper-catalyzed arylation of N-H and O-H Bonds, direct arylation reactions, carbanion aromatic synthesis, arylation reactions of alkenes, alkynes and much more. This compact source of high quality information is indispensable to synthetic chemists and those working in the pharmaceutical and chemical industry.

The role of diffraction methods for the solid-state sciences has been pivotal to determining the (micro)structure of a material. Particularly, the expanding activities in materials science have led to the development of new methods for analysis by diffraction. This book offers an authoritative overview of the new developments in the field of analysis of matter by (in particular X-ray, electron and neutron) diffraction. It is composed of chapters written by leading experts on 'modern diffraction methods'. The focus in the various chapters of this book is on the current forefront of research on and applications for diffraction methods. This unique book provides descriptions of the 'state of the art' and, at the same time, identifies avenues for future research. The book assumes only a basic knowledge of solid-state physics and allows the application of the described methods by the readers of the book (either graduate students or mature scientists).

The state-of-the-art in stereoselective synthesis! Thoroughly revised and updated, this enlarged second edition offers a plethora of valuable information on methods and reagents in stereoselective synthesis. Methods have been selected for high efficiency and selectivity; mechanistic aspects are treated succinctly, with a strong emphasis on practical applications. For this new edition, material has been added on * homogeneous diastereoselective hydrogenations * enantioselective oxidations * novel, efficient chiral auxiliaries Much of the information given is presented in figures and tables, which makes the book a valuable reference work for the practically minded organic chemist. From reviews of the first edition: 'The extensive material in the volume should prove particularly useful to anyone involved in synthetic chemistry or teaching a course in organic chemistry.' Journal of Medicinal Chemistry 'With nearly 1400 references cited, the book contains a wealth of information and should be a useful addition to the chemist's library.' The American Scientist