Download or read book Sulfur Mediated Rearrangements I written by E. Schaumann and published by Springer Science & Business Media. This book was released on 2007-02-15 with total page 195 pages. Available in PDF, EPUB and Kindle. Book excerpt: In their analysis of experiments and in their planning of syntheses, organic chemistsconsciouslyorunconsciouslytendtousetheprincipleofleastmotion, thechemicalequivalentofOccam'srazor. Inrearrangementreactionsthispr- ciple is violated and may make rearrangements problematic reactions. At the sametime,thereisalwaysfascinationintheunexpectedandsorearrangement reactionsarealsoanattractive'eldofstudy. Consequently, ourunderstanding of rearrangement reactions is now quite advanced and allows strategic uses in organic synthesis. Here, a helpful tool that may easily be overlooked is thein'uence oforganosulfurfunctionalitiesontheserearrangements. Infact, the presence of sulfur may make rearrangements predictable and productive or allow speci'c transformations which would otherwise require a tedious synthetic detour. The present account is meant to spread this knowledge. In addition, an introductory chapter gives a survey of the basics of organosulfur chemistry to put the information in the individual chapters into perspective and to help readers who are less familiar with the peculiarities of sulfur in an organicenvironment. Theamountofmaterialrequiringcoveragewassovastthatthevolumehadto besplitintotwoparts. Wehopethatreaderswillappreciatethecomprehensive and up-to-date information on sulfur-mediated rearrangements. Fortunately, leading experts were available to write the individual chapters and provide state-of-the-artreviews ofthecurrent researchonsulfur-mediated rearran- ments. It was a pleasure to work with these colleagues and I appreciate their involvement in spite of many other obligations. This volume should help the chemical community in their synthetic workand so it was worththe effort. Clausthal-Zellerfeld, October 2006 Ernst Schaumann Contents SulfurisMoreThantheFatBrotherofOxygen. AnOverviewofOrganosulfurChemistry E. Schaumann. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 RecentAdvancesinPummererReactions S. Akai·Y. Kita . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 1,2-SulfurMigrations A. W. Sromek·V. Gevorgyan. . . . . . . . . . . . . . . . . . . . . . . . 77 1,3-SulfurShifts:MechanismandSyntheticUtility S. K. Bur. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125 AuthorIndexVolumes251-274. . . . . . . . . . . . . . . . . . . . . . 173 Subject Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183 ContentsofVolume275 Sulfur-MediatedRearrangementsII Volume Editor: Ernst Schaumann ISBN: 978-3-540-68099-4 [2,3]-Sigmatropic RearrangementsofAllylic Sulfur Compounds M. Reggelin [2,3]Sigmatropic RearrangementsofPropargylic andAllenicSystems S. Braverman ·M.

Download or read book Sulfur Mediated Rearrangements II written by Ernst Schaumann and published by Springer Science & Business Media. This book was released on 2007-03-15 with total page 271 pages. Available in PDF, EPUB and Kindle. Book excerpt: With contributions by numerous experts

Download or read book Sulfur mediated Rearrangements written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Sulfur Mediated Rearrangements I written by Ernst Schaumann and published by Springer. This book was released on 2007-01-30 with total page 195 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Sulfur Mediated Rearrangements I written by Ernst Schaumann and published by Springer. This book was released on 2007-02-15 with total page 185 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Green Oxidation in Organic Synthesis written by Ning Jiao and published by John Wiley & Sons. This book was released on 2019-07-12 with total page 535 pages. Available in PDF, EPUB and Kindle. Book excerpt: A valuable introduction to green oxidation for organic chemists interested in discovering new strategies and new reactions for oxidative synthesis Green Oxidation in Organic Synthesis provides a comprehensive introduction and overview of chemical preparation by green oxidative processes, an entry point to the growing journal literature on green oxidation in organic synthesis. It discusses both experimental and theoretical approaches for the study of new catalysts and methods for catalytic oxidation and selective oxidation. The book highlights the discovery of new reactions and catalysts in recent years, discussing mechanistic insights into the green oxidative processes, as well as applications in organic synthesis with significant potential to have a major impact in academia and industry. Chapters are organized according to the functional groups generated in the reactions, presenting interesting achievements for functional group formation by green oxidative processes with O2, H2O2, photocatalytic oxidation, electrochemical oxidation, and enzymatic oxidation. The mechanisms of these novel transformations clearly illustrated. Green Oxidation in Organic Synthesis will serve as an excellent reference for organic chemists interested in discovering new strategies for oxidative synthesis which address the priorities of green and sustainable chemistry.

Download or read book Comprehensive Organic Synthesis written by and published by Newnes. This book was released on 2014-02-14 with total page 9815 pages. Available in PDF, EPUB and Kindle. Book excerpt: The second edition of Comprehensive Organic Synthesis—winner of the 2015 PROSE Award for Multivolume Reference/Science from the Association of American Publishers—builds upon the highly respected first edition in drawing together the new common themes that underlie the many disparate areas of organic chemistry. These themes support effective and efficient synthetic strategies, thus providing a comprehensive overview of this important discipline. Fully revised and updated, this new set forms an essential reference work for all those seeking information on the solution of synthetic problems, whether they are experienced practitioners or chemists whose major interests lie outside organic synthesis. In addition, synthetic chemists requiring the essential facts in new areas, as well as students completely new to the field, will find Comprehensive Organic Synthesis, Second Edition, Nine Volume Set an invaluable source, providing an authoritative overview of core concepts. Winner of the 2015 PROSE Award for Multivolume Reference/Science from the Association of American Publishers Contains more than170 articles across nine volumes, including detailed analysis of core topics such as bonds, oxidation, and reduction Includes more than10,000 schemes and images Fully revised and updated; important growth areas—including combinatorial chemistry, new technological, industrial, and green chemistry developments—are covered extensively

Download or read book Advances in Organometallic Chemistry written by and published by Academic Press. This book was released on 2018-05-21 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Organometallic Chemistry, Volume 69, contains authoritative review articles of world renowned researchers in the field of organometallic chemistry. This longstanding serial is known for its comprehensive coverage of topics in organometallic synthesis, reactions, mechanisms, homogeneous catalysis, and more, with this release focusing on topics such as C-H Activation Mediated by Main Group Inorganic and Organometallic Compounds, Transition-metals catalyzed intramolecular amination and hydroamination reactions of allenes, Green Fluorescent Protein-like and related organometallic fluorophores, Recent advances in the synthesis of C- S- bonds via metal-catalyzed functionalization of C- H- bonds, Current mechanistic understanding of Co-catalyzed C-H functionalization, and more. The book is ideal for a wide range of researchers involved in organometallic chemistry, including synthetic protocols, mechanistic studies and practical applications. - Contains contributions from leading authorities in the field of organometallic chemistry - Covers topics in organometallic synthesis, reactions, mechanisms, homogeneous catalysis, and more - Informs and updates readers on the latest developments in the field - Carefully edited to provide easy-to-read material

Download or read book Organic Chemistry written by Pierre Vogel and published by John Wiley & Sons. This book was released on 2019-07-30 with total page 1386 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides the background, tools, and models required to understand organic synthesis and plan chemical reactions more efficiently Knowledge of physical chemistry is essential for achieving successful chemical reactions in organic chemistry. Chemists must be competent in a range of areas to understand organic synthesis. Organic Chemistry provides the methods, models, and tools necessary to fully comprehend organic reactions. Written by two internationally recognized experts in the field, this much-needed textbook fills a gap in current literature on physical organic chemistry. Rigorous yet straightforward chapters first examine chemical equilibria, thermodynamics, reaction rates and mechanisms, and molecular orbital theory, providing readers with a strong foundation in physical organic chemistry. Subsequent chapters demonstrate various reactions involving organic, organometallic, and biochemical reactants and catalysts. Throughout the text, numerous questions and exercises, over 800 in total, help readers strengthen their comprehension of the subject and highlight key points of learning. The companion Organic Chemistry Workbook contains complete references and answers to every question in this text. A much-needed resource for students and working chemists alike, this text: -Presents models that establish if a reaction is possible, estimate how long it will take, and determine its properties -Describes reactions with broad practical value in synthesis and biology, such as C-C-coupling reactions, pericyclic reactions, and catalytic reactions -Enables readers to plan chemical reactions more efficiently -Features clear illustrations, figures, and tables -With a Foreword by Nobel Prize Laureate Robert H. Grubbs Organic Chemistry: Theory, Reactivity, and Mechanisms in Modern Synthesis is an ideal textbook for students and instructors of chemistry, and a valuable work of reference for organic chemists, physical chemists, and chemical engineers.

Download or read book Glycopeptides and Glycoproteins written by Valentin Wittmann and published by Springer. This book was released on 2007-01-30 with total page 271 pages. Available in PDF, EPUB and Kindle. Book excerpt: With contributions by numerous experts

Download or read book Creative Chemical Sensor Systems written by Thomas Schrader and published by Springer. This book was released on 2007-05-09 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: With contributions by numerous experts

Download or read book In Situ NMR Methods in Catalysis written by Joachim Bargon and published by Springer Science & Business Media. This book was released on 2007-05-15 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: Achemist,facedwiththeproblemofdeterminingthemechanismofachemical reaction, tries to identify a set of reactions that will account for the observed behavior:Ideally,asmallsetofknownreactionsshoulddescribeingreatdetail exactly what takes place at each stage of a chemical transformation. The fact that many reactions proceed in a stepwise fashion can most convincingly be demonstrated if intermediate species can be isolated and shown to proceed to the same products under otherwise identical reaction conditions. An - termediate is the reaction product of each of these steps, except for the last onethatformsthe?nalproduct. Someintermediatesarestablecompoundsin theirownright;someothers,however,aresoreactivethattheirisolationisnot possible. Occasionally, evidence for the existence of short-lived intermediates may be obtained, in particular by spectroscopic observation. The latter may - low a direct observation or an indirect inference from unusual phenomena occurring in the reaction products during in situ investigations of their c- responding chemical reactions. In NMR spectroscopy, for example, transient emissionandenhanced absorptionlinesmaybeobserved, andoneisinclined to believe that there is a universal and unambiguous reason for their appe- ance. Thisisnotnecessarilythecase,however,sincethisseeminglyidentical phenomenon may have a strikingly different origin: During free radical re- tions,aphenomenoncalledchemicallyinduced dynamicnuclear polarization (CIDNP) may give rise to virtually the same effect as occasionally observed duringhomogeneous(andpossiblyevenheterogeneous)hydrogenations:The latter phenomenon, called parahydrogen-induced polarization (PHIP), has a completely different physical basis. It was ?rst noticed twenty years later than CIDNP and occurs if there is an imbalance of the two spin isomers of symmetric molecules such as dihydrogen when hydrogenating unsaturated compoundsusingappropriatecatalysts. Thesetwoeffects,ifnotdifferentiated properly, can cause misinterpretations of reaction mechanisms, as occurred initially when their different origins had not yet been understood approp- ately.

Download or read book Glycoscience and Microbial Adhesion written by Thisbe K. Lindhorst and published by Springer Science & Business Media. This book was released on 2009-06-23 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: bacterial carbohydrate recognition are conveyed, covering Gram-positive as well as Gram-negative bacteria, in Chapter 4 Streptococci and Staphylococci, and in Chapter 5, carbohydrate binding specificities of Helicobacter pylori. In Chapter 6, "Bitter sweetness of complexity," the collected reflections on mic- bial adhesion are expanded by a perspective on a broader impact of glycosylation on cellular adhesion, motility and regulatory processes, paralleling the complexity of N-glycan structures on cell surfaces. It highlights particularly how structural details of N-glycans have been causally related to pathological scenarios, with a focus on ?(1,6)-N-acetylglucosaminyltransferase. In the final chapter, biofilm formation is reviewed, covering knowledge about structure and biosynthesis of polysaccharide intercellular adhesins (PIAs) which are central to biofilm formation. This comprehensive chapter explains all PIA-related principles of medical device-associated infections. It is our hope, that this collection of expert articles, ranging from structural ch- istry and structural biology to biochemistry and medicine, will be a stimulation and motivation for our colleagues in the life sciences. At the same time, we hope that these reflections on microbial adhesion will awake interest in and promote und- standing of the complex processes associated with the glycocalyx and the multif- eted interactions between the host cell and its "guest," as well as the biological consequences resulting from this mutual interplay.

Download or read book Metal Catalyzed Reductive C C Bond Formation written by Michael J. Krische and published by Springer Science & Business Media. This book was released on 2007-07-20 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: TheprototypicalcatalyticreductiveC-Cbondformations,theFischer-Tropsch reaction [1] and alkene hydroformylation [2], were discovered in 1922 and 1938, respectively [3,4]. These processes, which involve reductive coupling to carbon monoxide, have long been applied to the industrial manufacture of commodity chemicals [5]. Notably, alkene hydroformylation, also known as the oxo-synthesis, has emerged as the largest volume application of homo- neous metal catalysis, accounting for the production of over 7 million metric tons of aldehyde annually. Despite the impact of these prototypical reductive C-C bond formations, this ?eld of research lay fallow for several decades. Eventually, the increased availability of mild terminal reductants, in part- ular silanes, led to a renaissance in the area of catalytic reductive C-C bond formation.Forexample,the'rstcatalyticreductiveC-Ccouplingsbeyond- droformylation, which involve the hydrosilylative dimerization of conjugated dienes [6-12], appeared in 1969 - approximately 16 years after the ?rst - ported metal-catalyzed alkene hydrosilylation [13]. Following these seminal studies, the ?eld of catalytic reductive C-C bond formation underwent exp- sivegrowth,culminatingintheemergenceofanevergrowingbodyofresearch encompassing a powerful set of transformations. To our knowledge, no thematic volumes devoted solely to metal-catalyzed reductive C-C bond formationhave been assembled. For the ?rst time, in this issue of Topics in Current Chemistry,wepresent acompilation ofmonographs from several leaders in this burgeoning area of research. This collection of reviews serves to capture the diversity of catalytic reductive C-C couplings presently available and, in turn, the remarkable range of reactivity embodied by such transformations. There is no indication that this ?eld has reached its zenithanditisthehopeofthepresentauthorthatthisvolumewillfuelfurther progress.

Download or read book Templates in Chemistry III written by Peter Broekmann and published by Springer. This book was released on 2009-11-06 with total page 269 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume 1 intends to shed light on a selection of aspects of "template chemistry" by combining chapters from areas as different as templated solid state synthesis, metal-mediated self assembly processes, organometallic synthesis, the formation of mechanically interlocked molecules, and, last but not least, the production of inorganic materials based on organic templates such as gels. Volume 2 provides an even broader overview of and deeper insight into the template topic adding new aspects and new views.

Download or read book Amplification of Chirality written by Kenso Soai and published by Springer Science & Business Media. This book was released on 2009-11-04 with total page 211 pages. Available in PDF, EPUB and Kindle. Book excerpt: Amplification of Chirality presents critical reviews of the present position and future trends in modern chemical research. The book contains short and concise reports on chemistry. Each is written by the world renowned experts. Still valid and useful after 5 or 10 years, more information as well as the electronic version of the whole content available at: springerlink.com.

Download or read book Tubulin Binding Agents written by Teresa Carlomagno and published by Springer Science & Business Media. This book was released on 2009-06-26 with total page 339 pages. Available in PDF, EPUB and Kindle. Book excerpt: This series presents critical reviews of the present position and future trends in modern chemical research. It contains short and concise reports on chemistry, each written by the world renowned experts.