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Novel Approach To The Total Synthesis Of Indole Alkaloids Via Cyclopentanoid Intermediates
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Book Synopsis Novel Approach to the Total Synthesis of Indole Alkaloids Via Cyclopentanoid Intermediates by : Mark Wingfield
Download or read book Novel Approach to the Total Synthesis of Indole Alkaloids Via Cyclopentanoid Intermediates written by Mark Wingfield and published by . This book was released on 1982 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Novel Approach to the Total Synthesis of Corynanthe Indole Alkaloids Via Cyclopentanoid Intermediates by : Mark Wingfield
Download or read book Novel Approach to the Total Synthesis of Corynanthe Indole Alkaloids Via Cyclopentanoid Intermediates written by Mark Wingfield and published by . This book was released on 1986 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Novel Approach to the Total Synthesis of Corynanthe Indole Alkaloids Via Cyclopentanoid Intermediaries by : M. Wingfield
Download or read book A Novel Approach to the Total Synthesis of Corynanthe Indole Alkaloids Via Cyclopentanoid Intermediaries written by M. Wingfield and published by . This book was released on 1985 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis of Indole Alkaloids by : Reuben Murray White
Download or read book Synthesis of Indole Alkaloids written by Reuben Murray White and published by . This book was released on 2019 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Approaches Toward the Total Synthesis of Oroidin Alkaloids by : Apsara K. Herath
Download or read book Approaches Toward the Total Synthesis of Oroidin Alkaloids written by Apsara K. Herath and published by . This book was released on 2020 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nagelamides and ageliferin are oroidin-derived alkaloids which have gained the attention of the scientific community, because of their significant biological activity as well as the unprecedented structural diversity. Our work is directed toward the development of synthetic methods for the construction of oroidin dimers. Accordingly, this dissertation is composed of two sections; the chapter one provides an overview of the oroidin alkaloids with a particular focus on the nagelamide family and the third chapter describes synthetic studies towards ageliferin. The first part of chapter two focuses on the Palladium-catalyzed Stille cross-coupling reaction for the construction of the main dimeric scaffolds of the nagelamide molecules. First, we describe new methodology to synthesize the iodoimidazole fragment for use in the Stille cross-coupling reaction and subsequent progress in optimizing the yield of Stille reaction. Additional advancement of the synthesis has been achieved via azide installation in allylic and alkyl side chains of the basic framework of nagelamides A and C. A convenient method of dimethylaminosulfonyl group deprotection was reported on these advanced intermediates prior to the installation of pyrrole carboxamide moieties. The second part of chapter two details a novel approach for acylation was developed in azidecontaining imidazole systems using thio acid chemistry providing amides in one step. The reaction conditions were optimized in diverse monomeric imidazole containing-azide systems, and excellent yields of acetamide and benzamide formation were obtained. Interestingly, a newly synthesized pyrrole thio acid offers promising results for the installation of the pyrrole carboxamide moiety in oroidin-derived systems. This chemistry can be employed in the final transformation of nagelamide A and C to install the pyrrole carboxamide moieties, however; the final reaction conditions still require optimization. The third chapter describes a potential intermediate en route to ageliferin which was constructed through an intramolecular Diels-Alder reaction using 4-vinylimidazole tethered to a urazole as the starting material. The Diels-Alder precursor was synthesized through palladium-catalyzed TsujiTrost cross-coupling reaction between t-butyl carbonate protected vinylimidazole and Nphenylurazole in excellent yield. We have explored three different protecting groups (DMAS, Bn, and SEM) on the imidazole nitrogen which can affect both the Diels-Alder reactivity and the electronic nature of the tetrahydrobenzimidazole ring system. For example, this can influence the oxidative rearrangement and introduction of the C2-amino moiety at the later in the synthesis. Further studies are in progress to complete the total synthesis of ageliferin using these advanced intermediates.
Book Synopsis Total Synthesis of Natural Products by : Jie Jack Li
Download or read book Total Synthesis of Natural Products written by Jie Jack Li and published by Springer Science & Business Media. This book was released on 2013-03-14 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: 'Total Synthesis of Natural Products' is written and edited by some of today's leaders in organic chemistry. Eleven chapters cover a range of natural products, from steroids to alkaloids. Each chapter contains an introduction to the natural product in question, descriptions of its biological and pharmacological properties and outlines of total synthesis procedures already carried out. Particular emphasis is placed on novel methodologies developed by the respective authors and their research groups. This text is ideal for graduate and advanced undergraduate students, as well as organic chemists in academia and industry.
Book Synopsis Index to Theses with Abstracts Accepted for Higher Degrees by the Universities of Great Britain and Ireland and the Council for National Academic Awards by :
Download or read book Index to Theses with Abstracts Accepted for Higher Degrees by the Universities of Great Britain and Ireland and the Council for National Academic Awards written by and published by . This book was released on 1988 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Artificial Metalloenzymes and MetalloDNAzymes in Catalysis by : Montserrat Diéguez
Download or read book Artificial Metalloenzymes and MetalloDNAzymes in Catalysis written by Montserrat Diéguez and published by John Wiley & Sons. This book was released on 2018-02-21 with total page 431 pages. Available in PDF, EPUB and Kindle. Book excerpt: An important reference for researchers in the field of metal-enzyme hybrid catalysis Artificial Metalloenzymes and MetalloDNAzymes in Catalysis offers a comprehensive review of the most current strategies, developed over recent decades, for the design, synthesis, and optimization of these hybrid catalysts as well as material about their application. The contributors—noted experts in the field—present information on the preparation, characterization, and optimization of artificial metalloenzymes in a timely and authoritative manner. The authors present a thorough examination of this interesting new platform for catalysis that combines the excellent selective recognition/binding properties of enzymes with transition metal catalysts. The text includes information on the various applications of metal-enzyme hybrid catalysts for novel reactions, offers insights into the latest advances in the field, and contains an informative perspective on the future: Explores the development of artificial metalloenzymes, the modern and strongly evolving research field on the verge of industrial application Contains a comprehensive reference to the research area of metal-enzyme hybrid catalysis that has experienced tremendous growth in recent years Includes contributions from leading researchers in the field Shows how this new catalysis combines the selective recognition/binding properties of enzymes with transition metal catalysts Written for catalytic chemists, bioinorganic chemists, biochemists, and organic chemists, Artificial Metalloenzymes and MetalloDNAzymes in Catalysis offers a unique reference to the fundamentals, concepts, applications, and the most recent developments for more efficient and sustainable synthesis.
Book Synopsis Indole Ring Synthesis by : Gordon W. Gribble
Download or read book Indole Ring Synthesis written by Gordon W. Gribble and published by John Wiley & Sons. This book was released on 2016-08-08 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt: Of the myriad of heterocycles known to man, the indole ring stands foremost for its remarkably versatile chemistry, its enormous range of biological activities, and its ubiquity in the terrestrial and marine environments. The indole ring continues to be discovered in natural products and to be employed in man-made pharmaceuticals and other materials. Given the enormous resurgence in indole ring synthesis over the past decade — highlighted by the power of transition metal catalysis — this authoritative guide addresses the need for a comprehensive presentation of the myriad of methods for constructing the indole ring, from the ancient to the modern, and from the obscure to the well-known. Following presentation of the classic indole ring syntheses and many newer methods, coverage continues with indole ring syntheses via pyrroles, indolines, oxindoles, isatins, radical and photochemical reactions, aryne cycloadditions. This extensive volume concludes with the modern transition metal–catalyzed indole ring syntheses that utilize copper, palladium, rhodium, gold, ruthenium, platinum, and other metals to fashion the indole ring Indole Ring Synthesis is a comprehensive, authoritative and up-to-date guide to the synthesis of this important heterocycle for organic chemists, pharmaceutical researchers and those interested in the chemistry of natural products.
Book Synopsis The Chemistry of Mycotoxins by : Stefan Bräse
Download or read book The Chemistry of Mycotoxins written by Stefan Bräse and published by Springer Science & Business Media. This book was released on 2013-02-14 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: The biological activity of mycotoxins ranges from weak and/or sometimes positive effects, such as antibacterial activity (see penicillin derivatives derived from Penicillium strains) to strong mutagenic (e. g. aflatoxins, patulin), carcinogenic (e. g. aflatoxins), teratogenic, neurotoxic (e. g. ochratoxins), nephrotoxic (e. g. fumonisins, citrinin), hepatotoxic, and immunotoxic (e. g. ochratoxins, diketopiperazines) activity. Nowadays, many laboratories around the world are specialized in the detection of mycotoxins in food products and contaminated material found in housing. In this volume, a focus on the most important classes of mycotoxins is provided and their chemistry of the last ten years is discussed. In each Section, the individual biological impact is outlined. Sections are arranged according to mycotoxin classes (e. g. aflatoxins) and/or structural classes (e. g. resorcinyl lactones, diketopiperazines). The biology of mycotoxins is also described.
Book Synopsis The Pauson-Khand Reaction by : Ramon Rios Torres
Download or read book The Pauson-Khand Reaction written by Ramon Rios Torres and published by John Wiley & Sons. This book was released on 2012-03-01 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Pauson-Khand reaction is an important reaction in the field of organic chemistry. It involves the transition-metal catalysed cycloaddition of an alkyne, an alkene and carbon monoxide, to produce cyclopentenones. The importance of this reaction originates from its high value in transforming simple components into the synthetically useful cyclopentenone unit, in which a high degree of molecular complexity can be achieved in a single step, with impressive stereochemical and regiochemical control. The Pauson-Khand Reaction investigates the nature and many variations of this reaction. Topics covered include: the mechanisms of Pauson‐Khand-type reactions non chiral intramolecular and intermolecular versions of Pauson‐Khand reactions asymmetric Pauson‐Khand reaction using chiral auxiliaries the enantioselective Pauson‐Khand reaction Pauson‐Khand reactions catalysed by metals other than cobalt unconventional Pauson‐Khand reactions the Pauson‐Khand reaction in total synthesis Presenting a comprehensive overview of this fundamental reaction, The Pauson-Khand Reaction will find a place on the bookshelves of any organic or organometallic chemist.
Book Synopsis American Doctoral Dissertations by :
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1987 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis and Characterization of Glycosides by : Marco Brito-Arias
Download or read book Synthesis and Characterization of Glycosides written by Marco Brito-Arias and published by Springer Nature. This book was released on 2022-04-22 with total page 543 pages. Available in PDF, EPUB and Kindle. Book excerpt: This third edition is a comprehensive and extended study about the best known approaches for preparing the main types of glycosides, covering the classic and more recent glycosylation reactions used for preparing simple and challenging glycosides currently used as potent antiviral and antineoplastic drugs, or fluorogenic substrates used for enzymatic detection in cell biology. Besides, this new edition provides more examples of the glycosidic methodologies followed for preparing complex glycoconjugates such as glycoproteins and glycosphingolipids and gangliosides used as adjuvants or as synthetic vaccines candidates. Also, additional mechanistic evidence is presented for better understanding of the glycosylation reaction, trying to identify the variables mainly depending on protecting and leaving groups, as well as catalyst and reaction condition which altogether directs the anomeric stereo control. A chapter on the glycoside hydrolysis is included in view of the increasing interest in the use of biomass as a natural and renewable source for obtaining important intermediates or products used in food or valuable materials. The author includes information in the characterization of glycosides section with the aim of giving additional tools for the structural assignment through NMR, X-Ray and mass spectra techniques.
Book Synopsis Domino Reactions in Organic Synthesis by : Lutz F. Tietze
Download or read book Domino Reactions in Organic Synthesis written by Lutz F. Tietze and published by John Wiley & Sons. This book was released on 2006-12-13 with total page 631 pages. Available in PDF, EPUB and Kindle. Book excerpt: Domino reactions enable you to build complex structures in one-pot reactions without the need to isolate intermediates- a dream comes true. In this book, the well-respected expert, Professor Lutz Tietze, summarizes the possibilities of this reaction type - an approach for an efficiant, economically benificial and ecological benign synthesis. A definite must for every organic chemist.
Book Synopsis Biotransformations in Organic Chemistry by : Kurt Faber
Download or read book Biotransformations in Organic Chemistry written by Kurt Faber and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 329 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of natural catalysts - enzymes - for the transformation of non-natural is not at all new: they have been used for more man-made organic compounds than one hundred years, employed either as whole cells, cell organelles or isolated enzymes [1]. Certainly, the object of most of the early research was totally different from that of the present day. Thus the elucidation of biochemical pathways and enzyme mechanisms was in the foreground of the reasearch some decades ago. It was mainly during the 1980s that the enormous potential of applying natural catalysts to transform non-natural organic compounds was recognized. What started as a trend in the late 1970s could almost be called a fashion in synthetic organic chemistry in the 1990s. Although the early euphoria during the 'gold rush' in this field seems to have eased somewhat, there is still no limit to be seen for the future development of such methods. As a result of this extensive, recent research, there have been an estimated 5000 papers published on the subject [2]. To collate these data as a kind of 'super-review' would clearly be an impossible task and, furthermore, such a hypothetical book would be unpalatable for the non-expert.
Book Synopsis Veterinary Herbal Medicine by : Susan G. Wynn
Download or read book Veterinary Herbal Medicine written by Susan G. Wynn and published by Elsevier Health Sciences. This book was released on 2006-11-29 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt: This full-color reference offers practical, evidence-based guidance on using more than 120 medicinal plants, including how to formulate herbal remedies to treat common disease conditions. A body-systems based review explores herbal medicine in context, offering information on toxicology, drug interactions, quality control, and other key topics. More than 120 herbal monographs provide quick access to information on the historical use of the herb in humans and animals, supporting studies, and dosing information. Includes special dosing, pharmacokinetics, and regulatory considerations when using herbs for horses and farm animals. Expanded pharmacology and toxicology chapters provide thorough information on the chemical basis of herbal medicine. Explores the evolutionary relationship between plants and mammals, which is the basis for understanding the unique physiologic effects of herbs. Includes a body systems review of herbal remedies for common disease conditions in both large and small animals. Discusses special considerations for the scientific research of herbs, including complex and individualized interventions that may require special design and nontraditional outcome goals.
Book Synopsis Pharmacology and Applications of Naturally Occurring Iridoids by : Biswanath Dinda
Download or read book Pharmacology and Applications of Naturally Occurring Iridoids written by Biswanath Dinda and published by Springer. This book was released on 2019-03-26 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book, the author provides expert analysis on naturally occurring iridoids, their chemistry and their distribution in plants and insects. Particular attention is given to the pharmacology of iridoids and their prospective applications in pharmaceutical and agricultural industries. Iridoids are found in a wide variety of plants and some insects, and they are structurally derived from monoterpenoid natural products. In the first two chapters of this book, the author describes the iridoids classification, occurrence and distribution in plants and insects. The following chapters cover different chromatographic and spectroscopic techniques that can be used to identify and quantify iridoids in herbal formulations, and also the biosynthesis of iridoids, in which the reader will discover a metabolomics and transcriptomics analysis to identify the genes involved in the biosynthesis. The final chapters provide insights on several pharmacological activities of iridoids, their physiological role in insects, pharmacokinetics in mammals, insects and microorganisms, and their applications in medicine and agriculture. This book will engage students and researchers interested in the chemistry of natural products, and it will also appeal to medicinal chemists and practitioners working in the design of new herbal drugs with bioactive pure iridoids.
