Download or read book Asymmetric Butylation of Aldehydes Mediated by Chiral Lithium Amides and Investigations of Lithium Amide Aggregates in Solution written by Jia Liu and published by . This book was released on 2007 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chiral Lithium Amides in Asymmetric Synthesis written by Per I. Arvidsson and published by . This book was released on 1999 with total page 101 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2008 with total page 980 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Polymer supported Chiral Lithium Amide Bases and Structural Investigation on Bis amino boron Enolates written by Lili Ma and published by . This book was released on 2008 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chiral lithium amide bases (CLAB's) have been successfully used in asymmetric organic reactions in the past decades. Despite the increasing use of polymeric reagents in organic synthesis, the number of papers describing polymer-supported chiral lithium amide bases (pCLAB's) is limited. The pCLAB's have several advantages such as easy separation and reuse. Additionally, the "polymeric effect" often plays an important role in organic reactions, such as physical separation of aggregates and steric interference. All these prompted us to study the structure and reactions of pCLAB's. Polymer-supported chiral amines were effectively prepared from amino acid derivatives and Merrifield resin. Treatment of polymer-supported amines with n-butyllithium gave the corresponding pCLAB's which were tested in asymmetric deprotonation reactions of prochiral ketones. Trimethylsilyl enol ethers were obtained in up to 82% ee at room temperature without additives. The polymer-supported chiral lithium amides can be readily recycled and reused without significant loss of reactivity and selectivity.
Download or read book Chiral Lithium Amides written by Mark Robert Prestly and published by . This book was released on 2013 with total page 237 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Asymmetric Synthesis Mediated by Chiral Lithium Amides written by Johan Granander and published by . This book was released on 2005 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chiral Lithium Amide on Soluble Polymer Support and Structure of Mixed Aggregates of Chiral Lithium Amides written by Kuiwang Wu and published by . This book was released on 2006 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chiral Lithium Amides in Asymmetric Synthesis written by Jane M. Paul and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Computational Mechanistic Studies of Chiral Lithium Amide Induced Enantioselective Rearrangements and Superacid Activation of Methane written by Sten O. Nilsson Lill and published by . This book was released on 2001 with total page 155 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structure and Reactivity of Organolithiums Lithium Diisoproplyamide mediated Enolizations and Amino Alkoxide mediated 1 2 additions of Butyllithium written by Xiufeng Sun and published by . This book was released on 2001 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt: 6Li and 15N NMR spectroscopic investigations of lithium diisopropylamide-mediated ester enolization in THF, t-BuOMe, HMPA/THF, and DMPU/THF reveal substantial concentrations of mixed aggregates. While quantitative rate studies revealed that the metalations by lithium diisopropylamide homonuclear dimers proceed at nearly solvent-independent rates, the reactivities of the intermediate mixed aggregates are markedly lower and quite sensitive to the choice of solvent. The autoinhibition correlates the relative stabilities of the mixed aggregates. However, the relative stabilities do not correlate in a simple fashion with the ligating properties of the solvent.
Download or read book Side Reactions in Organic Synthesis written by Florencio Zaragoza Dörwald and published by John Wiley & Sons. This book was released on 2006-03-06 with total page 389 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most syntheses in the chemical research laboratory fail and usually require several attempts before proceeding satisfactorily. Failed syntheses are not only discouraging and frustrating, but also cost a lot of time and money. Many failures may, however, be avoided by understanding the structure-reactivity relationship of organic compounds. This textbook highlights the competing processes and limitations of the most important reactions used in organic synthesis. By allowing chemists to quickly recognize potential problems this book will help to improve their efficiency and success-rate. A must for every graduate student but also for every chemist in industry and academia. Contents: 1 Organic Synthesis: General Remarks 2 Stereoelectronic Effects and Reactivity 3 The Stability of Organic Compounds 4 Aliphatic Nucleophilic Substitutions: Problematic Electrophiles 5 The Alkylation of Carbanions 6 The Alkylation of Heteroatoms 7 The Acylation of Heteroatoms 8 Palladium-Catalyzed C-C Bond Formation 9 Cyclizations 10 Monofunctionalization of Symmetric Difunctional Substrates
Download or read book The Claisen Rearrangement written by Martin Hiersemann and published by John Wiley & Sons. This book was released on 2007-02-27 with total page 591 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first comprehensive coverage of all facets of the Claisen rearrangement and its variants. As such, this book helps synthetic chemists to exploit the vast potential of this elegant C-C linking reaction, discusses a wealth of catalytic options, and gives those more theory-minded chemists a detailed insight into the mechanistic aspects of the Claisen rearrangement. An invaluable source of information and a ready reference for all organic and catalytic chemists, as well as those working with/on organometallics, and in industry.
Download or read book Organolithiums in Enantioselective Synthesis written by David M. Hodgson and published by Springer. This book was released on 2003-09-04 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is the first dedicated to a comprehensive coverage of this rapidly developing transdisciplinary field. It provides a rich source of essential information on synthesizing molecules in an enantioselective manner using organolithiums, and serves as an inspiration for future developments.
Download or read book Frustrated Lewis Pairs II written by Gerhard Erker and published by Springer. This book was released on 2013-12-12 with total page 321 pages. Available in PDF, EPUB and Kindle. Book excerpt: Frustrated Lewis Pairs: From Dihydrogen Activation to Asymmetric Catalysis, by Dianjun Chen, Jürgen Klankermayer Coexistence of Lewis Acid and Base Functions: A Generalized View of the Frustrated Lewis Pair Concept with Novel Implications for Reactivity, by Heinz Berke, Yanfeng Jiang, Xianghua Yang, Chunfang Jiang, Subrata Chakraborty, Anne Landwehr New Organoboranes in "Frustrated Lewis Pair" Chemistry, by Zhenpin Lu, Hongyan Ye, Huadong Wang Paracyclophane Derivatives in Frustrated Lewis Pair Chemistry, by Lutz Greb, Jan Paradies Novel Al-Based FLP Systems, by Werner Uhl, Ernst-Ulrich Würthwein N-Heterocyclic Carbenes in FLP Chemistry, by Eugene L. Kolychev, Eileen Theuergarten, Matthias Tamm Carbon-Based Frustrated Lewis Pairs, by Shabana Khan, Manuel Alcarazo Selective C-H Activations Using Frustrated Lewis Pairs. Applications in Organic Synthesis, by Paul Knochel, Konstantin Karaghiosoff, Sophia Manolikakes FLP-Mediated Activations and Reductions of CO2 and CO, by Andrew E. Ashley, Dermot O’Hare Radical Frustrated Lewis Pairs, by Timothy H. Warren and Gerhard Erker Polymerization by Classical and Frustrated Lewis Pairs, by Eugene Y.-X. Chen Frustrated Lewis Pairs Beyond the Main Group: Transition Metal-Containing Systems, by D. Wass Reactions of Phosphine-Boranes and Related Frustrated Lewis Pairs with Transition Metal Complexes, by Abderrahmane Amgoune, Ghenwa Bouhadir, Didier Bourissou
Download or read book Chemistry for Pharmacy Students written by Professor Satyajit D. Sarker and published by John Wiley & Sons. This book was released on 2013-05-28 with total page 397 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This book has succeeded in covering the basic chemistry essentials required by the pharmaceutical science student... the undergraduate reader, be they chemist, biologist or pharmacist will find this an interesting and valuable read." –Journal of Chemical Biology, May 2009 Chemistry for Pharmacy Students is a student-friendly introduction to the key areas of chemistry required by all pharmacy and pharmaceutical science students. The book provides a comprehensive overview of the various areas of general, organic and natural products chemistry (in relation to drug molecules). Clearly structured to enhance student understanding, the book is divided into six clear sections. The book opens with an overview of general aspects of chemistry and their importance to modern life, with particular emphasis on medicinal applications. The text then moves on to a discussion of the concepts of atomic structure and bonding and the fundamentals of stereochemistry and their significance to pharmacy- in relation to drug action and toxicity. Various aspects of aliphatic, aromatic and heterocyclic chemistry and their pharmaceutical importance are then covered with final chapters looking at organic reactions and their applications to drug discovery and development and natural products chemistry. accessible introduction to the key areas of chemistry required for all pharmacy degree courses student-friendly and written at a level suitable for non-chemistry students includes learning objectives at the beginning of each chapter focuses on the physical properties and actions of drug molecules
Download or read book Handbook of Maleic Anhydride Based Materials written by Osama M. Musa and published by Springer. This book was released on 2016-09-22 with total page 642 pages. Available in PDF, EPUB and Kindle. Book excerpt: A handbook on syntheses and properties, production processes, and applications of maleic anhydride and maleic anhydride derived products – all in one text. This handbook provides a comprehensive overview of maleic anhydride chemistry and applications from the professional perspective. With chapters written by leading R&D scientists from the chemical industry, and edited by the Vice President and ASI Technology Chief at Ashland Specialty Ingredients (ASI), Dr. Osama M. Musa, readers will find a unique perspective and summary of the latest advancements in the field of maleic anhydride science. Maleic anhydride is produced industrially on large scale (10E3 kt/annum). Its rich chemistry makes it an important raw material for numerous products and processes (e.g. for applications in polymers and coatings), many of which are covered in this handbook for the first time in a comprehensive manner. The broad scope spans topics ranging from production techniques (including topics such as processes, catalysis, trouble-shooting), synthesis and properties of small and polymeric maleic anhydride based compounds (focusing on industrially relevant compounds as well as emerging areas of importance) and in-depth and broad discussions of commercial maleic anhydride based applications.
Download or read book New Methodologies and Techniques for a Sustainable Organic Chemistry written by Alessandro Mordini and published by Springer Science & Business Media. This book was released on 2008-04-17 with total page 339 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemical industries have to face the challenge of finding adequate processes to produce large quantities of new products, while at the same time decreasing both the impact on the environment and the risk of disaster. This book addresses this challenge. It discusses the problems of environmentally benign organic processes on an interdisciplinary approach. The book features experts in selective catalysis, development of new reagents and methods who present their recent results.
