Описание: This book investigates carbon nucleophiles in selenocyclisations, as well as reaction protocols for performing such reactions catalytically. Details electrophilic selenium-mediated reactions and strategies using selenium catalysts and more.
Название: Sulfur-mediated rearrangements ISBN: 3540680977 ISBN-13(EAN): 9783540680970 Издательство: Springer Рейтинг: Цена: 40310 р. Наличие на складе: Поставка под заказ.
Описание: 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.
Автор: Fertin, Guillaume, E Название: Combinatorics of genome rearrangements ISBN: 0262062828 ISBN-13(EAN): 9780262062824 Издательство: MIT Press Рейтинг: Цена: 1731 р. Наличие на складе: Поставка под заказ.
Описание: A comprehensive survey of a rapidly expanding field of combinatorial optimization, mathematically oriented but offering biological explanations when required.
Автор: Ernst Schaumann; S. Akai; S.K. Bur; V. Gevorgyan; Название: Sulfur-Mediated Rearrangements I ISBN: 3642087779 ISBN-13(EAN): 9783642087776 Издательство: Springer Рейтинг: Цена: 40310 р. Наличие на складе: Поставка под заказ.
Описание: 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.
Описание: Considers various applications of equimeasurable function rearrangements to the "best constant"- type problems. This volume includes a product-space extension of the Rising Sun lemma, a product-space version of the John-Nirenberg inequality for bounded mean oscillation (BMO) functions with sharp exponent, and Gurov-Reshetnyak, reverse Holder.
Автор: Schaumann Ernst Название: Sulfur-Mediated Rearrangements II ISBN: 3540680993 ISBN-13(EAN): 9783540680994 Издательство: Springer Рейтинг: Цена: 35620 р. Наличие на складе: Поставка под заказ.
Автор: Martin Hiersemann Название: The Claisen Rearrangement: Methods and Applications ISBN: 3527308253 ISBN-13(EAN): 9783527308255 Издательство: Wiley Рейтинг: Цена: 27500 р. Наличие на складе: Поставка под заказ.
Описание: The first comprehensive coverage of all facets of the Claisen rearrangementd 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.
Описание: The book consists of a brief introduction, a foreward provided byprofessor Danishefsky of Columbia University, and about 14 -16 chapters, each written by one or two eminent scholars/authorsdescribing their recent research in the area of either dominoreactions or intramolecular rearrangements in carbohydratechemistry. 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 andoften lead to highly complex products as well. Although manyrecently isolated carbohydrates fulfill various sophisticatedfunctions, their structures are often very complex. The editorscover the broadest scope of novel methodologies possible. All thesynthetic and application aspects of domino/cascade reactions areexplored in this book. A second theme that will be covered isintramolecular 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 areideally suited to synthesize certain specific modifiedmonosaccharides. What is particularly important is that bothprocesses are intermolecular and almost always yield products withvery well-defined stereochemistry. This high definition isabsolutely crucial when synthesizing advanced, modified mono andoligosaccharides. The choice of contributors reflects anemphasis on both therapeutic and pharmacological aspects of carbohydratechemistry.
Автор: Nielsen Название: Organic Synthesis and Molecular Engineering ISBN: 1118150929 ISBN-13(EAN): 9781118150924 Издательство: Wiley Рейтинг: Цена: 17463 р. Наличие на складе: Поставка под заказ.
Описание: With a focus on methods and practices for how to engineer functionality into organic molecules, Organic Synthesis and Molecular Engineering takes a synthesis-oriented approach to organic materials chemistry.
Описание: The book covers different aspects of the chemistry and physics of molecular materials, including organic synthesis of specific organic donors and ligands, organic metals and superconductors, molecule-based magnets, multiproperty materials and organic-inorganic hybrids. The 17 chapters are written by some of the most authoritative authors in their field. The two last chapters are devoted to molecular electronics and devices, in particular the achievements and potential for applications. An excellent work for all students and researchers in organic conductors, superconductors and molecule based magnets.
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