Download or read book The Pursuit of Palau amine written by Ian Bass Seiple and published by . This book was released on 2011 with total page 1460 pages. Available in PDF, EPUB and Kindle. Book excerpt: These total syntheses were enabled by a catalytic, enantioselective Diels-Alder reaction and by the invention of a chemoselective silver(II)-mediated oxidation, which inspired an investigation into unexplored domains of silver-mediated chemistry. The discovery that a silver(I)/persulfate system can effect the radical deborylation of aryl- and alkylboronic acids led to new practical methods for the C-H functionalization of heterocycles and quinones. This discovery further prompted the reinvestigation of other underutilized methods for radical functionalization, namely radical trifluoromethylation of heterocyles. This thesis will show how an endeavor in total synthesis, namely the pursuit of palau'amine, can lead to discoveries and inventions that transcend its original goals and lead to lasting lessons in science.
Download or read book Structure Elucidation in Organic Chemistry written by Maria-Magdalena Cid and published by John Wiley & Sons. This book was released on 2015-04-20 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt: Intended for advanced readers, this is a review of all relevant techniques for structure analysis in one handy volume. As such, it provides the latest knowledge on spectroscopic and related techniques for chemical structure analysis, such as NMR, optical spectroscopy, mass spectrometry and X-ray crystallography, including the scope and limitation of each method. As a result, readers not only become acquainted with the techniques, but also the advantages of the synergy between them. This enables them to choose the correct analytical method for each problem, saving both time and resources. Special emphasis is placed on NMR and its application to absolute configuration determination and the analysis of molecular interactions. Adopting a practical point of view, the author team from academia and industry guarantees both solid methodology and applications essential for structure determination, equipping experts as well as newcomers with the tools to solve any structural problem.
Download or read book Modern Natural Product Synthesis written by Masahisa Nakada and published by Springer Nature. This book was released on with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Naturally Occurring Organohalogen Compounds written by A. Douglas Kinghorn and published by Springer Nature. This book was released on 2023-07-24 with total page 553 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present volume is the third in a trilogy that documents naturally occurring organohalogen compounds, bringing the total number — from fewer than 25 in 1968 — to approximately 8,000 compounds to date. Nearly all of these natural products contain chlorine or bromine, with a few containing iodine and, fewer still, fluorine. Produced by ubiquitous marine (algae, sponges, corals, bryozoa, nudibranchs, fungi, bacteria) and terrestrial organisms (plants, fungi, bacteria, insects, higher animals) and universal abiotic processes (volcanos, forest fires, geothermal events), organohalogens pervade the global ecosystem. Newly identified extraterrestrial sources are also documented. In addition to chemical structures, biological activity, biohalogenation, biodegradation, natural function, and future outlook are presented.
Download or read book Annual Reports on NMR Spectroscopy written by and published by Academic Press. This book was released on 2015-02-26 with total page 311 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nuclear magnetic resonance (NMR) is an analytical tool used by chemists and physicists to study the structure and dynamics of molecules. In recent years, no other technique has gained such significance as NMR spectroscopy. It is used in all branches of science in which precise structural determination is required and in which the nature of interactions and reactions in solution is being studied. Annual Reports on NMR Spectroscopy has established itself as a premier means for the specialist and non-specialist alike to become familiar with new techniques and applications of NMR spectroscopy. This volume of Annual Reports on NMR Spectroscopy focuses on the analytical tools used by chemists and physicists, taken together with other volumes of this series, an excellent account of progress in NMR and its many applications is provided and anyone using NMR will find interest in this Serial
Download or read book Selected Papers from XVI MaNaPro and XI ECMNP written by Susana P. Gaudêncio and published by MDPI. This book was released on 2021-09-03 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: The oceans harbor the majority of the Earth´s biodiversity. Marine organisms/microorganisms provide a diverse array of natural products, which are important sources of biologically active agents with unique chemical structures and a broad range of medical and biotechnological applications. The XVI MaNaPro and XI ECMNP conferences aim to present advances and future perspectives on marine natural product research to the scientific community by gathering scientists who work in marine chemistry and related scientific fields from all over the world and at different seniority levels. This Special Issue was organized on the occasion of the 2nd joint XVI MaNaPro and XI ECMNP meeting (http://wmnp2019.ipleiria.pt/) held in Peniche, Portugal, in 2019. It comprises 12 original research articles that exemplify research performed in the scope of the conference topics.
Download or read book LC NMR written by Nina C. Gonnella and published by CRC Press. This book was released on 2020-01-15 with total page 321 pages. Available in PDF, EPUB and Kindle. Book excerpt: The isolation and structural characterization of substances present at very low concentrations, as is necessary to satisfy regulatory requirements for pharmaceutical drug degradants and impurities, can present scientific challenges. The coupling of HPLC with NMR spectroscopy has been at the forefront of cutting-edge technologies to address these issues. LC-NMR: Expanding the Limits of Structure Elucidation presents a comprehensive overview of key concepts in HPLC and NMR that are required to achieve definitive structure elucidation with very low levels of analytes. Because skill sets from both of these highly established disciplines are involved in LC-NMR, the author provides introductory background to facilitate readers’ proficiency in both areas, including an entire chapter on NMR theory. The much-anticipated second edition provides guidance in setting up LC-NMR systems, discussion of LC methods that are compatible with NMR, and an update on recent hardware and software advances for system performance, such as improvements in magnet design, probe technology, and solvent suppression techniques that enable unprecedented mass sensitivity in NMR. This edition features methods to quantify concentration and assess purity of isolated metabolites on the micro scale and incorporates computational approaches to accelerate the structure elucidation process. The author also includes implementation and application of qNMR and automated and practical use of computational chemistry combined with QM and DFT to predict highly accurate NMR chemical shifts. The text focuses on current developments in chromatographic-NMR integration, with particular emphasis on utility in the pharmaceutical industry. Applications include trace analysis, analysis of mixtures, and structural characterization of degradation products, impurities, metabolites, peptides, and more. The text discusses novel uses and emerging technologies that challenge detection limits as well future directions for this important technique. This book is a practical primary resource for NMR structure determination—including theory and application—that guides the reader through the steps required for isolation and NMR structure elucidation on the micro scale.
Download or read book Theilheimer s Synthetic Methods of Organic Chemistry written by G. Tozer-Hotchkiss and published by Karger Medical and Scientific Publishers. This book was released on 2008 with total page 479 pages. Available in PDF, EPUB and Kindle. Book excerpt: The current volume contains abstracts of new synthetic methods and supplementary data from papers published in the scientific literature up to December 2007 as well as reviews published up to April 2008 and trends up to May 2008.
Download or read book Progress in Heterocyclic Chemistry written by and published by Elsevier. This book was released on 2014-10-27 with total page 635 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the 26th annual volume of Progress in Heterocyclic Chemistry and covers the literature published during 2013 on most of the important heterocyclic ring systems. This volume opens with two specialized reviews, not restricted to work published in 2013: ‘Recent Developments in the Synthesis of Cyclic Guanidine Alkaloids’ written by Matthew G. Donahue, and ‘Heterocyclic chemistry: a complete toolbox for nanostructured carbon materials’ written by Luisa Lascialfari, Stefano Fedeli, and Stefano Cicchi. The remaining chapters examine the 2013 literature on the common heterocycles in order of increasing ring size and the heteroatoms present. Recognized as the premiere review of heterocyclic chemistry Contributions from leading researchers in the field Systematic survey of the important 2013 heterocyclic chemistry literature
Download or read book Superbases for Organic Synthesis written by Tsutomu Ishikawa and published by John Wiley & Sons. This book was released on 2009-01-26 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Guanidines, amidines and phosphazenes have been attracting attention in organic synthesis due to their potential functionality resulting from their extremely strong basicity. They are also promising catalysts because of their potential for easy molecular modification, possible recyclability, and reduced or zero toxicity. Importantly, these molecules can be derived as natural products – valuable as scientists move towards “sustainable chemistry”, where reagents and catalysts are derived from biomaterial sources. Superbases for Organic Synthesis is an essential guide to these important molecules for preparative organic synthesis. Topics covered include the following aspects: an introduction to organosuperbases physicochemical properties of organic superbases amidines and guanidines in organic synthesis phosphazene: preparation, reaction and catalytic role polymer-supported organosuperbases application of organosuperbases to total synthesis related organocatalysts: proton sponges and urea derivatives amidines and guanidines in natural products and medicines Superbases for Organic Synthesis is a comprehensive, authoritative and up-to-date guide to these important reagents for organic chemists, drug discovery researchers and those interested in the chemistry of natural products.
Download or read book Advances in Heterocyclic Chemistry written by Alan R. Katritzky and published by Academic Press. This book was released on 2011-01-07 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: Established in 1960, Advances in Heterocyclic Chemistry is the definitive serial in the area-one of great importance to organic chemists, polymer chemists, and many biological scientists. Written by established authorities in the field, the comprehensive reviews combine descriptive chemistry and mechanistic insight and yield an understanding of how the chemistry drives the properties. Provides up-to-date material on a fast-growing and highly topical subject area Contains the latest research covering a wide variety of heterocyclic topics Written by leading authorities and designed as a handbook for students and industry and academic researchers
Download or read book Lewis Base Catalysis in Organic Synthesis written by Edwin Vedejs and published by John Wiley & Sons. This book was released on 2016-08-03 with total page 1488 pages. Available in PDF, EPUB and Kindle. Book excerpt: This three-volume set represents the first comprehensive coverage of the rapidly expanding field of Lewis base catalysis that has attracted enormous attention in recent years. Lewis base catalysis is a conceptually novel paradigm that encompasses an extremely wide variety of preparatively useful transformations and is particularly effective for enantioselectively constructing new stereogenic centers. As electron-pair donors, Lewis bases can influence the rate and stereochemical course of myriad synthetic organic reactions. The book presents the conceptual/mechanistic principles that underlie Lewis base catalysis, and then builds upon that foundation with a thorough presentation of many different reaction types. And last but not least, the editors, Prof. Edwin Vedejs and Prof. Scott E. Denmark, are without doubt the leaders in this emerging field and have compiled high quality contributions from an impressive collection of international experts.
Download or read book Global Trends 2040 written by National Intelligence Council and published by Cosimo Reports. This book was released on 2021-03 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The ongoing COVID-19 pandemic marks the most significant, singular global disruption since World War II, with health, economic, political, and security implications that will ripple for years to come." -Global Trends 2040 (2021) Global Trends 2040-A More Contested World (2021), released by the US National Intelligence Council, is the latest report in its series of reports starting in 1997 about megatrends and the world's future. This report, strongly influenced by the COVID-19 pandemic, paints a bleak picture of the future and describes a contested, fragmented and turbulent world. It specifically discusses the four main trends that will shape tomorrow's world: - Demographics-by 2040, 1.4 billion people will be added mostly in Africa and South Asia. - Economics-increased government debt and concentrated economic power will escalate problems for the poor and middleclass. - Climate-a hotter world will increase water, food, and health insecurity. - Technology-the emergence of new technologies could both solve and cause problems for human life. Students of trends, policymakers, entrepreneurs, academics, journalists and anyone eager for a glimpse into the next decades, will find this report, with colored graphs, essential reading.
Download or read book The Chemistry of the Quinonoid Compounds Volume 2 written by Saul Patai and published by Wiley. This book was released on 2010-01-16 with total page 892 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is Part 1 of the second volume of a three volume work devoted to the chemistry of quinonoid compounds. Part 2 is published simultaneously, as is a volume set containing both parts. The work is intended to form a comprehensive review of the current state of research in quinonoid compounds starting with general and theoretical aspects and encompassing, among other things, physical and chemical methods, mass spectra, PES, chiroptical properties, chemiluminescence, recent advances in the synthesis of quinonoid compounds and in photochemistry, chemistry and biochemistry.
Download or read book Handbook of Surface Plasmon Resonance written by Richard B. M. Schasfoort and published by Royal Society of Chemistry. This book was released on 2017-05-30 with total page 555 pages. Available in PDF, EPUB and Kindle. Book excerpt: Surface plasmon resonance (SPR) plays a dominant role in real-time interaction sensing of biomolecular binding events, this book provides a total system description including optics, fluidics and sensor surfaces for a wide researcher audience.
Download or read book Ion Channel Factsbook written by and published by Academic Press. This book was released on 1995-11-16 with total page 471 pages. Available in PDF, EPUB and Kindle. Book excerpt: How do you keep track of basic information on the proteins you work with? Where do you find details of their physicochemical properties, sequence information, gene organization? Are you tired of scanning review articles, primary papers and databases to locate that elusive fact? The Academic Press FactsBook series will satisfy scientists and clinical researchers suffering from information overload. Each volume provides a catalogue of the essential properties of families of molecules. Gene organization, sequence information, physicochemical properties, and biological activity are presented using a common, easy to follow format. Taken together they compile everything you wanted to know about proteins but were too busy to look for.In a set of four inter-related volumes, The Ion Channel FactsBook provides a comprehensive framework of facts about channel molecules central to electrical signalling phenomena in living cells. The first volume is devoted to Extracellular Ligand-Gated Integral Receptor-Channel Families including those molecular complexes activated by: 5-Hydroxytryptamine, ATP, Glutamate, Acetylcholine, GABA, Glycine. Nomenclature Expression Sequence analyses Structure and function Electrophysiology Pharmacology Information retrieval
Download or read book Elasmobranch Biodiversity Conservation and Management written by Sarah L. Fowler and published by IUCN. This book was released on 2002 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Darwin Elasmobranch Biodiversity Conservation and Management project in Sabah held a three-day international seminar that included a one-day workshop in order to highlight freshwater and coastal elasmobranch conservation issues in the region and worldwide, to disseminate the result of the project to other Malaysian states and countries, and to raise awareness of the importance of considering aspects of elasmobranch biodiversity in the context of nature conservation, commercial fisheries management, and for subsistence fishing communities. These proceedings contain numerous peer-reviewed papers originally presented at the seminar, which cover a wide range of topics, with particular reference to species from freshwater and estuarine habitats. The workshop served to develop recommendations concerning the future prospects of elasmobranch fisheries, biodiversity, conservation and management. This paper records those conclusions, which highlight the importance of elasmobranchs as top marine predators and keystone species, noting that permanent damage to shark and ray populations are likely to have serious and unexpected negative consequences for commercial and subsistence yields of other important fish stocks.
