Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Cinchona Alkaloid Catalyzed Asymmetric Heterodimerization Of Ketenes
Download Cinchona Alkaloid Catalyzed Asymmetric Heterodimerization Of Ketenes full books in PDF, epub, and Kindle. Read online Cinchona Alkaloid Catalyzed Asymmetric Heterodimerization Of Ketenes ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Cinchona Alkaloid-catalyzed Asymmetric Heterodimerization of Ketenes by : Divya Nalla
Download or read book Cinchona Alkaloid-catalyzed Asymmetric Heterodimerization of Ketenes written by Divya Nalla and published by . This book was released on 2011 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: A method for accessing enantioenriched ketene heterodimer [Greek letter beta]-lactones through the cinchona alkaloid-catalyzed formal [2+2] cycloaddition of various aldoketenes (generated in situ) with ketoketenes (alkylarylketenes and diarylketene) was developed. The ketene heterodimer [Greek letter beta]-lactones were formed in good to excellent yields (up to 90%) and with excellent enantioselectivity (ee up to 99%). Ring-opening reactions on ketene heterodimer [Greek letter beta]-lactones were carried out to access [Greek letter beta]-hydroxy ketenes, [Greek letter beta]-ketoamides and [Greek letter beta]-hydroxyamides with good yields (62-93%), with moderate to excellent diastereoselectivity, and with excellent retention of chirality (91-96% ee). 31PNMR spectroscopic studies and kinetic studies were carried out to shed light on the mechanism of the tri-n-butylphosphine-catalyzed homodimerization of ketoketenes.
Book Synopsis Cinchona Alkaloids in Synthesis and Catalysis by : Choong Eui Song
Download or read book Cinchona Alkaloids in Synthesis and Catalysis written by Choong Eui Song and published by John Wiley & Sons. This book was released on 2009-09-03 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive review of cinchona-based chiralilty inducers and their applications covers every topic, including ligands, immobilization and organocatalysis. Each chapter summarizes the scope and limitations of the new methods and technologies, while the final chapter contains carefully selected working procedures of cinchona alkaloid-promoted reactions organized according to reaction type. Invaluable reading for anyone wanting to learn about the current state of this hot topic.
Book Synopsis Lewis Base-catalyzed Formal [2+2] Cycloadditions of Ketenes by : Ahmad A. Ibrahim
Download or read book Lewis Base-catalyzed Formal [2+2] Cycloadditions of Ketenes written by Ahmad A. Ibrahim and published by . This book was released on 2011 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: [Greek letter beta]-Lactones, important targets in synthesis, are integral structural features of many biologically active molecules such as Salinosporamide A, Omuralide, panclicin D and 1233A. [Greek letter beta]-Lactones have also been employed in the synthesis of many natural products. Two important pathways to access [Greek letter beta]-Lactones from ketenes have been reported in the literature. The first pathway to [Greek letter beta]-lactones is through dimerization of ketenes, and the other pathway is through a formal [2+2] cycloaddition of ketenes and aldehydes or ketones. While the asymmetric homodimerization of certain aldoketenes has been reported by Calter and co-workers, our group and Ye's group have communicated independently results in the asymmetric homodimerization of ketoketenes. We have found that Josiphos phosphine catalysts (10 mol% catalyst loading) are optimal nucleophilic catalysts for homodimerization of alkylarylketenes with high asymmetic induction (up to 96% ee), and dialkylketenes (up to 99% yield). We also investigated phosphine-catalyzed formal [2+2} cycloaddition of alkylarylketoketenes and aldehydes and found the chiral diphosphine catalyst R-BINAPHANE to be the optimal catalyst in terms of enantioselectivity (up to 99% ee), diastereoselectivity (dr up to 99:1) and yield. Only a few isolated cases of regioselective heterodimerization of ketenes have been reported in the literature and those have used special ketenes. We have developed a method for accessing ketene heterodimer [Greek letter beta]-lactones in a highly regioselective and enantioselective fashion through the cinchona alkaloid-catalyzed formal [2+2] cycloaddition of various aldoketenes (generated in situ) with ketoketenes (alkylarylketenes and dimethylketene) or trimethylsilylketene. The ketene heterodimers are formed in good to excellent yields (up to 90%) and with excellent enantioselectivities (up to 99%).
Book Synopsis Synthetic and Mechanistic Studies of Cinchona Alkaloid Catalyzed Asymmetric [4+2] Addition Reactions by : Keith J. Bartelson
Download or read book Synthetic and Mechanistic Studies of Cinchona Alkaloid Catalyzed Asymmetric [4+2] Addition Reactions written by Keith J. Bartelson and published by . This book was released on 2012 with total page 229 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis of Cinchona Alkaloid Analogues as Mechanistic Probes of the Osmium-catalyzed Asymmetric Dihydroxylation of Olefins by : John Wesley Young
Download or read book Synthesis of Cinchona Alkaloid Analogues as Mechanistic Probes of the Osmium-catalyzed Asymmetric Dihydroxylation of Olefins written by John Wesley Young and published by . This book was released on 1991 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Organocatalytic Cycloadditions for Synthesis of Carbo- and Heterocycles by : Prof. Min Shi
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.
Book Synopsis Methods and Applications of Cycloaddition Reactions in Organic Syntheses by : Nagatoshi Nishiwaki
Download or read book Methods and Applications of Cycloaddition Reactions in Organic Syntheses written by Nagatoshi Nishiwaki and published by John Wiley & Sons. This book was released on 2013-12-17 with total page 996 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Progress in Heterocyclic Chemistry by :
Download or read book Progress in Heterocyclic Chemistry written by and published by Newnes. This book was released on 2013-09-06 with total page 561 pages. Available in PDF, EPUB and Kindle. Book excerpt: Progress in Heterocyclic Chemistry is an annual review series commissioned by the International Society of Heterocyclic Chemistry (ISHC). Volumes in the series contain both highlights of the previous year's literature on heterocyclic chemistry and articles on new, developing topics of particular interest to heterocyclic chemists. The highlight chapters in Volume 25 are all written by leading researchers in their field, and these chapters constitute a systematic survey of the important original material reported in the literature of heterocyclic chemistry in 2012. As with previous volumes in the series, Volume 25 will enable academic and industrial chemists and advanced students to keep abreast of developments in heterocyclic chemistry in a convenient way. - Recognized as the premiere review of heterocyclic chemistry - Contributions from leading researchers in the field - Systematic survey of the important 2012 heterocyclic chemistry literature
Book Synopsis Handbook of Reagents for Organic Synthesis by : Tomislav Rovis
Download or read book Handbook of Reagents for Organic Synthesis written by Tomislav Rovis and published by John Wiley & Sons. This book was released on 2016-10-20 with total page 816 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spurred by the desire to make chemistry a sustainable and "greener" technology, the field of organocatalysis has grown to become one of the most important areas in synthetic organic chemistry. Organic catalysts can often replace potentially toxic metal catalysts and allow reactions to proceed under mild reaction conditions, thereby saving energy costs and rendering chemical processes inherently safer. More importantly perhaps, organocatalysis offers a complementary reactivity in many instances leading to increased versatility.This Handbook describes 126 key reagents for organocatalytic reactions and will be especially useful for professionals in the area of sustainable chemistry, medicinal research, as well as synthetic organic chemists working in academia and the pharmaceutical industry. All the information compiled in this volume is also available in electronic format on Wiley Online Library. The 126 reagents represented here are but a small fraction of the ca. 5,000 reagents available in the electronic Encyclopedia of Reagents for Organic Synthesis (e-EROS). e-EROS offers various search interfaces to locate reagents of interest, including chemical structure, substructure and reactions search modes. e-EROS is updated regularly with new and updated entries.
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2008 with total page 1006 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Science of Synthesis: Stereoselective Synthesis Vol. 2 by : Gary A. Molander
Download or read book Science of Synthesis: Stereoselective Synthesis Vol. 2 written by Gary A. Molander and published by Thieme. This book was released on 2014-05-14 with total page 1494 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbonyl and imino groups are two of the most integral functional groups employed in organic synthesis. Specific topics discussed: reduction, alkylation, alkenylation, and arylation of these groups, as well as asymmetric aldol, Mannich, and Morita-Bayliss-Hillman reactions. This volume is part of a 3-volume set: Science of Synthesis Stereoselective Synthesis Workbench Edition Further information about Stereoselective Synthesis (including sample pages and the table of contents)
Book Synopsis The Science of Flavonoids by : Erich Grotewold
Download or read book The Science of Flavonoids written by Erich Grotewold and published by Springer Science & Business Media. This book was released on 2008 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the only book of its kind to provide an overview of the science of flavonoids in plants.
Book Synopsis Frontiers of Green Catalytic Selective Oxidations by : Konstantin P. Bryliakov
Download or read book Frontiers of Green Catalytic Selective Oxidations written by Konstantin P. Bryliakov and published by Springer. This book was released on 2020-10-15 with total page 295 pages. Available in PDF, EPUB and Kindle. Book excerpt: The demand for novel efficient and environmentally sustainable chemo, regio- and stereoselective catalyst systems for the oxidation of organic substrates is continuously growing in line with toughening economic and environmental constraints. This book addresses these issues; it consists of eleven chapters written by world-recognized experts in green and sustainable oxidation catalysis. The most urgent and challenging topics, in the judgment of the editor, such as green asymmetric epoxidations, sulfoxidatiuons, C–H oxidations; oxidation catalysis by polyoxometalates and oxidations in non-conventional solvents, etc. have been critically reviewed in this book. Both fundamental aspects, such as catalysts design, catalytic properties, nature of catalytically active sites and reaction mechanisms, and practical outlook of the oxidations have been addressed by the authors. The book appeals to a broad readership, particularly graduate students, employees of universities and research organizations, and industrial researchers, particularly those working in the areas of homogeneous oxidation catalysis, asymmetric synthesis, organocatalysis, sustainable catalytic processes and green chemistry, mechanisms of catalytic reactions, synthesis of bioactive compounds, biomimetic chemistry, etc. Konstantin Bryliakov is Leading Researcher at the Boreskov Institute of Catalysis. In 2016, he was elected Honorary Professor of the Russian Academy of Sciences.
Book Synopsis Plant-derived Natural Products by : Anne E. Osbourn
Download or read book Plant-derived Natural Products written by Anne E. Osbourn and published by Springer Science & Business Media. This book was released on 2009-07-07 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plants produce a huge array of natural products (secondary metabolites). These compounds have important ecological functions, providing protection against attack by herbivores and microbes and serving as attractants for pollinators and seed-dispersing agents. They may also contribute to competition and invasiveness by suppressing the growth of neighboring plant species (a phenomenon known as allelopathy). Humans exploit natural products as sources of drugs, flavoring agents, fragrances and for a wide range of other applications. Rapid progress has been made in recent years in understanding natural product synthesis, regulation and function and the evolution of metabolic diversity. It is timely to bring this information together with contemporary advances in chemistry, plant biology, ecology, agronomy and human health to provide a comprehensive guide to plant-derived natural products. Plant-derived natural products: synthesis, function and application provides an informative and accessible overview of the different facets of the field, ranging from an introduction to the different classes of natural products through developments in natural product chemistry and biology to ecological interactions and the significance of plant-derived natural products for humans. In the final section of the book a series of chapters on new trends covers metabolic engineering, genome-wide approaches, the metabolic consequences of genetic modification, developments in traditional medicines and nutraceuticals, natural products as leads for drug discovery and novel non-food crops.
Download or read book Biochirality written by Pedro Cintas and published by Springer. This book was released on 2014-07-08 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: Early History of the Recognition of Molecular Biochirality, by Joseph Gal, Pedro Cintas Synthesis and Chirality of Amino Acids Under Interstellar Conditions, by Chaitanya Giri, Fred Goesmann, Cornelia Meinert, Amanda C. Evans, Uwe J. Meierhenrich Chemical and Physical Models for the Emergence of Biological Homochirality, by son E. Hein, Dragos Gherase, Donna G. Blackmond Biomolecules at Interfaces: Chiral, Naturally, by Arántzazu González-Campo and David B. Amabilino Stochastic Mirror Symmetry Breaking: Theoretical Models and Simulation of Experiments, by Celia Blanco, David Hochberg Self-Assembly of Dendritic Dipeptides as a Model of Chiral Selection in Primitive Biological Systems, by Brad M. Rosen, Cécile Roche, Virgil Percec Chirality and Protein Biosynthesis, by Sindrila Dutta Banik, Nilashis Nandi
Book Synopsis Textbook of Organic Medicinal and Pharmaceutical Chemistry by : Charles Owens Wilson
Download or read book Textbook of Organic Medicinal and Pharmaceutical Chemistry written by Charles Owens Wilson and published by Lippincott Williams & Wilkins. This book was released on 1977 with total page 1150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis C-C Bond Activation by : Guangbin Dong
Download or read book C-C Bond Activation written by Guangbin Dong and published by Springer. This book was released on 2014-09-18 with total page 265 pages. Available in PDF, EPUB and Kindle. Book excerpt: The series Topics in Current Chemistry presents critical reviews of the present and future trends in modern chemical research. The scope of coverage is all areas of chemical science including the interfaces with related disciplines such as biology, medicine and materials science. The goal of each thematic volume is to give the non-specialist reader, whether in academia or industry, a comprehensive insight into an area where new research is emerging which is of interest to a larger scientific audience. Each review within the volume critically surveys one aspect of that topic and places it within the context of the volume as a whole. The most significant developments of the last 5 to 10 years are presented using selected examples to illustrate the principles discussed. The coverage is not intended to be an exhaustive summary of the field or include large quantities of data, but should rather be conceptual, concentrating on the methodological thinking that will allow the non-specialist reader to understand the information presented. Contributions also offer an outlook on potential future developments in the field. Review articles for the individual volumes are invited by the volume editors. Readership: research chemists at universities or in industry, graduate students
![Download Lewis Base-catalyzed Formal [2+2] Cycloadditions of Ketenes PDF Online Free](https://books.google.com/books/content/images/frontcover/SqRTtwAACAAJ?fife=w200-h370)
![Download Synthetic and Mechanistic Studies of Cinchona Alkaloid Catalyzed Asymmetric [4+2] Addition Reactions PDF Online Free](https://books.google.com/books/content/images/frontcover/iIU9MwEACAAJ?fife=w200-h370)
