Nucleophilic Ring Opening of Various Oxabicyclic Compounds PDF Download
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Author: SHIHONG. MA
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Languages : en
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Author: SHIHONG. MA
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Languages : en
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Author: CHRISTOPHER. GAJDA
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Languages : en
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Author: PAULINE. CHIU
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Languages : en
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Author: Kelsey Jack
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Languages : en
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Author: Nhut Kiet Diep
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Category : Nucleophilic reactions
Languages : en
Pages : 324
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Polyketides constitute an important family of natural products, having a broad spectrum of biological activity such as antitumor, antibiotic, antifungal, or immunomodulatory action.1 Many of these compounds possess polypropionates (units with alternating hydroxyl and methyl groups), reflecting their common biosynthesis that is found within nature. Their structural complexity and importance of these compounds as therapeutical agents have made them attractive targets for synthetic organic chemists.1 Excellent chiral propionate reagents have been developed over the years, including many chiral auxiliaries to direct and promote stereoselectivity, but most recent, investigations have focused upon developing metal-catalyzed asymmetric ring opening. To achieve these results, transition metals (Ni, Pd, Pt) have been employed leading to synthetically useful transformations.
![Exploring the New Chemistry of 3-Aza-2-oxabicyclo[2.2.1]hept-5-enes PDF](https://books.google.com/books/content/images/frontcover/T-B5zgEACAAJ?fife=w80-h100)
Author: Katrina Marie Tait
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Languages : en
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Synthetic organic chemistry is at the center of drug design/development, which uses literature reactions to create biologically active compounds. A downfall to this approach is that there is still so much unknown about the reactivity profile of organic bicyclic molecules. While many heterobicyclic alkenes have been studied, there are significantly fewer reports about the reactivity of 3-aza-2-oxabicyclo[2.2.1]hept-5-enes. The first part of this work examines the Lewis acid-catalyzed ring-opening/rearrangement of 3-aza-2-oxabicyclo[2.2.1]hept-5-enes to form a cyclized nitrone or oxazolidinone product depending on the catalyst. The next section investigates the ruthenium-catalyzed ring-opening and isomerization of 3-aza-2-oxabicylo[2.2.1]hept-5-enes in the presence of amines. Ruthenium mediates the ring-opening to form an unsaturated aminocyclopentenol product which undergoes allylic alcohol isomerization to provide the corresponding cyclopentanone. The final section first investigates the cyclopropanation of 3-aza-2-oxabicyclo[2.2.1]hept-5-enes under palladium catalysis with diazomethane which was well tolerated for various substrates. The latter part of this section focuses on the acid-catalyzed nucleophilic ring-opening reaction of the previously synthesized cyclopropanated substrate with alcohols. The substrate undergoes ring-opening through C-O bond cleavage to form a substituted methanocyclopentane product.
Author: Wade H. Shafer
Publisher: Springer Science & Business Media
ISBN: 1461519691
Category : Science
Languages : en
Pages : 426
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Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS)* at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dis semination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all concerned if the printing and distribution of the volumes were handled by an international publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Corporation of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 38 (thesis year 1993) a total of 13,787 thesis titles from 22 Canadian and 164 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this impor tant annual reference work. While Volume 38 reports theses submitted in 1993, on occasion, certain uni versities do report theses submitted in previous years but not reported at the time.
![Ring Opening Reactions of Oxabicyclic Compounds [microform] : Formation of Substituted Cyclohexadienes, Cyclohexenols and Cycloheptenols PDF](https://books.google.com/books/content/images/frontcover/BbL8ygAACAAJ?fife=w80-h100)
Author: Shihong Ma
Publisher: National Library of Canada = Bibliothèque nationale du Canada
ISBN: 9780612188976
Category :
Languages : en
Pages : 514
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Author: Varun Rawat
Publisher: CRC Press
ISBN: 100055550X
Category : Science
Languages : en
Pages : 214
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As the broad challenges around energy and the environment have become the focus of much research, scientists and experts have dedicated their efforts to developing more active and selective catalytic systems for key chemical transformations. For many decades environmentally viable protocols for the synthesis of fine chemicals have been the crux of academic and industrial research. Heterogeneous Catalysis in Organic Transformations serves as an overview of this work, providing a complete description of role of heterogeneous catalysis in organic transformations and offering a review of the current and near future technologies and applications. Discusses the fundamentals of catalysis and compares the advantages and disadvantages of different types of catalyst systems Examines oxide nanoparticles and noble metal nanoparticles Consider organometallic compounds, solid-supported catalysts, and mesoporous materials Describes recent advances in metal-based heterogeneous catalysts and new reactions with possible mechanistic pathways Providing a comprehensive review of heterogeneous catalysis from the basics through recent advances, this book will be of keen interest to undergraduates, graduates, and researchers in chemistry, chemical engineering, and associated fields.
Author: Zvi Rappoport
Publisher: John Wiley & Sons
ISBN: 0470093382
Category : Science
Languages : en
Pages : 1140
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The Patai Series publishes comprehensive reviews on all aspects of specific functional groups. Each volume contains outstanding surveys on theoretical and computational aspects, NMR, MS, other spectroscopic methods and analytical chemistry, structural aspects, thermochemistry, photochemistry, synthetic approaches and strategies, synthetic uses and applications in chemical and pharmaceutical industries, biological, biochemical and environmental aspects. To date, over 110 volumes have been published in the series. Recently Published Titles The chemistry of the Cyclopropyl Group (Volume 2) The chemistry of the Hydrazo, Azo and Azoxy Groups (Volume 2, 2 parts) The chemistry of Double-Bonded Functional Groups (Volume 3, 2 parts) The chemistry of Organophosphorus Compounds (Volume 4) The chemistry of Halides, Pseudo-Halides and Azides (Volume 2, 2 parts) The chemistry of the Amino, Nitro and Nitroso Groups (2 volumes, 2 parts) The chemistry of Dienes and Polyenes (2 volumes) The chemistry of Organic Derivatives of Gold and Silver The chemistry of Organic Silicon Compounds (2 volumes, 4 parts) The chemistry of Organic Germanium, Tin and Lead Compounds (Volume 2, 2 parts) The chemistry of Phenols (2 parts) The chemistry of Organolithium Compounds (2 volumes, 3 parts) The chemistry of Cyclobutanes (2 parts) The chemistry of Peroxides (Volume 2, 2 parts) The chemistry of Organozinc Compounds (2 parts) Forthcoming Titles The chemistry of Anilines The chemistry of Organomagnesium Compounds The Patai Series Online The Patai Series is available in electronic format on Wiley InterScience. All new titles will be published as online books and a growing list of older titles will be added every year. It is the ultimate goal that all titles published in the Patai Series will be available in electronic format. For more information see under Online Books on: www.interscience.wiley.com
