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Synthesis And Anticancer Evaluation Of Agelastatin Alkaloid Derivatives And Enantioselective Total Synthesis Of Aspidosperma Alkaloids
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Book Synopsis Synthesis and Anticancer Evaluation of Agelastatin Alkaloid Derivatives and Enantioselective Total Synthesis of Aspidosperma Alkaloids by : Alyssa Hope Antropow
Download or read book Synthesis and Anticancer Evaluation of Agelastatin Alkaloid Derivatives and Enantioselective Total Synthesis of Aspidosperma Alkaloids written by Alyssa Hope Antropow and published by . This book was released on 2018 with total page 231 pages. Available in PDF, EPUB and Kindle. Book excerpt: I. Synthesis and Evaluation of Agelastatin Derivatives as Potent Modulators for Cancer Invasion and Metastasis The synthesis of new agelastatin alkaloid derivatives and their anticancer evaluation in the context of the breast cancer microenvironment is described. A variety of Ni -alkyl and C5-ether agelastatin derivatives were accessed via application of our strategy for convergent imidazolone synthesis. We have discovered that agelastatin alkaloids are potent modulators for cancer invasion and metastasis at non-cytotoxic doses. We discuss the increased potency of (-)-agelastatin E as compared to (-)-agelastatin A in this capacity, in addition to identification of new agelastatin derivatives with activity that is statistically equivalent to (-)-agelastatin E. II. Enantioselective Synthesis of (-)-Vallesine: Late-stage C17-Oxidation via Complex Indole Boronation The first enantioselective total synthesis of (-)-vallesine via a strategy that features a late-stage regioselective C17-oxidation followed by a highly stereoselective transannular cyclization is described. The versatility of this approach is highlighted by divergent synthesis of the archetypal alkaloid of this family, (+)-aspidospermidine, and an A-ring oxygenated derivative (+)- deacetylaspidospermine, the precursor to (-)-vallesine, from a common intermediate. III. Enantioselective Total Synthesis of (-)-Jerantinine A from (-)-Melodinine P via Bio-Inspired A-Ring Oxidation The first enantioselective synthesis of (-)-melodinine P and its direct conversion to related alkaloid (-)-jerantinine A is described. A key para-aza-quinone methide pentacyclic intermediate enables A-ring to C-ring oxidation state transfer. Our synthesis is streamlined through the development of two multi-step single-pot procedures which proceed with high efficiency. We further demonstrate the utility ofpara-aza-quinone methide intermediates in our strategy for CI6-methoxylation which provides entry to the (-)-jerantinine alkaloid family.
Book Synopsis Enantioselective Total Synthesis of the Agelastatin and Trigonoliimine Alkaloids by : Sunkyu Han
Download or read book Enantioselective Total Synthesis of the Agelastatin and Trigonoliimine Alkaloids written by Sunkyu Han and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: I. Total Synthesis of the (-)-Agelastatin Alkaloids The pyrrole-imidazole family of marine alkaloids, derived from linear clathrodin-like precursors, constitutes a diverse array of structurally complex natural products. The bioactive agelastatins are members of this family that possess a tetracyclic molecular framework incorporating C4-C8 and C7-N12 bond connectivities. We provide a hypothesis for the formation of the unique agelastatin architecture that maximally exploits the intrinsic chemistry of plausible biosynthetic precursors. We report the concise enantioselective total syntheses of all known agelastatin alkaloids including the first total syntheses of agelastatins C, D, E, and F. Our gram-scale chemical synthesis of agelastatin A was inspired by our hypothesis for the biogenesis of the cyclopentane C-ring and required the development of new transformations including an imidazolone-forming annulation reaction and a carbohydroxylative trapping of imidazolones. II. Total Synthesis of the (-)-Trigonoliimine Alkaloids The concise and enantioselective total syntheses of (-)-trigonoliimines A, B, and C are described. Our unified strategy to all three natural products is based on asymmetric oxidation and reorganization of a single bistryptamine, a sequence of transformations with possible biogenetic relevance. We revise the absolute stereochemistry of (-)-trigonoliimines A, B, and C.
Book Synopsis Total Synthesis and Anticancer Evaluation of All Known Communesin Alkaloids and Related Complex Derivatives by : Matthew M. Pompeo
Download or read book Total Synthesis and Anticancer Evaluation of All Known Communesin Alkaloids and Related Complex Derivatives written by Matthew M. Pompeo and published by . This book was released on 2019 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt: I. Convergent and Biomimetic Enantioselective Total Synthesis of (-)-Communesin F Enabled by Diazene-Directed Fragment Assembly. The first biomimetic enantioselective total synthesis of (-)-communesin F based on a late-stage heterodimerization and aminal exchange is described. Our synthesis features the expedient diazene-directed assembly of two advanced fragments to secure the congested C3a-C3a' linkage in three steps, followed by a highly efficient biogenetically inspired aminal reorganization to access the heptacyclic communesin core in only two additional steps. Enantioselective syntheses of the two fragments were developed, with highlights including the catalytic asymmetric halocyclization of tryptamine derivatives, a stereoselective sulfinimine allylation, and an efficient cyclotryptamine-C3a-sulfamate synthesis by either a new silver-promoted nucleophilic amination or a rhodium-catalyzed C-H amination protocol. The versatile synthesis of the fragments, their stereocontrolled assembly, and the efficient aminal-exchange as supported by in situ monitoring experiments, in addition to the final stage Nl'-acylation of the communesin core provide a highly convergent synthesis of (-)-communesin F. II. Enantioselective Total Synthesis and Anticancer Activity of All Known Communesin Alkaloids and Related Complex Derivatives. A unified enantioselective total synthesis and side-by-side anticancer evaluation of all known epoxide-containing communesin alkaloids and related complex derivatives is described. Our synthesis is predicated on the convergent and modular diazene-directed assembly of two advanced fragments to secure the critical C3a-C3a' linkage followed by a guided biomimetic aminal reorganization to deliver the heptacyclic core of these alkaloids. Concise enantioselective syntheses of the fragments were devised, with highlights including the use of a new, rationallydesigned sulfinamide chiral auxiliary and a highly efficient 1,1,1 -trifluoroacetone-mediated epoxidation. The modularity of our convergent approach enables the rapid synthesis of all epoxidecontaining members of the communesin family from a common synthetic intermediate, which prompted the stereochemical revision of (-)-communesin I, the most recently isolated communesin analogue. Furthermore, the generality of our biomimetic reorganization was conclusively demonstrated in the first total synthesis of an iso-communesin derivative, an unnatural constitutional isomer of the communesin skeleton. Finally, we report the first comparative analysis of the anticancer activities of all naturally occurring communesin alkaloids and nine complex derivatives against five human cancer cell lines. From these data, we have identified (-)- communesin B as the most potent natural isolate and discovered that derivatives with N8'- sulfonamide substitution exhibit up to a ten-fold increase in potency over the natural products.
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 Cardiac Electrophysiology by : Andrea Natale
Download or read book Cardiac Electrophysiology written by Andrea Natale and published by Springer Science & Business Media. This book was released on 2011-03-01 with total page 603 pages. Available in PDF, EPUB and Kindle. Book excerpt: Clinical cardiac electrophysiology is one of the most rapidly expanding fields in cardiology. There are currently no comprehensive case based books in this field. A Case Review of Cardiac Electrophysiology is a case based review of cardiac electrophysiology. The aim of this book is to provide a comprehensive case based review of cardiac electrophysiology. It will include implantable device cases as well as ablation cases and difficult clinical cases and may be used as a useful review in cardiac electrophysiology for those taking board examinations. There will also be cases that will be useful for associate professionals working in the field of cardiac electrophysiology including those individuals working for industry.
Book Synopsis Hypervalent Iodine in Organic Synthesis by : A. Varvoglis
Download or read book Hypervalent Iodine in Organic Synthesis written by A. Varvoglis and published by Academic Press. This book was released on 1996-11-14 with total page 245 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the fascinating chemistry of the many kinds of organic compounds of hypervalent iodine. Each chapter deals with a particular iodine compound or families of compounds which have been used as reagents in a plethora of useful transformations. These include assorted oxidation, such as with the precious Dess-Martin reagent as well as with a wide range of further reactions. Prominent features of hypervalent iodine reagents derived from iodobenzene are: ready availability, operational simplicity, mild reaction conditions, and high efficiency. They are environmentally safe and can be recycled. New species may be easily prepared by introducing substituents in the benzene ring or changing the ligand attached to iodine. Their combination with other reagents broadens considerably their synthetic potential. Today, no synthetic chemist can afford to ignore the valuable hypervalentiodine reagents. - Features up-to-date coverage of a wide range of topics - Includes many tables featuring a diversity of reactivity, and a comprehensive index - Acts as a comprehensive, up-to-date reference on all aspects of hypervalent iodine chemistry - Contains a section on unusual efficiency of hypervalent iodine reactions
Book Synopsis Heterocycles as Chiral Auxiliaries in Asymmetric Synthesis by : Manfred Braun
Download or read book Heterocycles as Chiral Auxiliaries in Asymmetric Synthesis written by Manfred Braun and published by Springer Nature. This book was released on 2020-12-08 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: The series Topics in Heterocyclic Chemistry presents critical reviews on present and future trends in the research of heterocyclic compounds. Overall the scope is to cover topics dealing with all areas within heterocyclic chemistry, both experimental and theoretical, of interest to the general heterocyclic chemistry community. The series consists of topic related volumes edited by renowned editors with contributions of experts in the field. All chapters from Topics in Heterocyclic Chemistry are published Online First with an individual DOI. In references, Topics in Heterocyclic Chemistry is abbreviated as Top Heterocycl Chem and cited as a journal.
Book Synopsis The Pyrrolizidine Alkaloids by : L. B. Bull
Download or read book The Pyrrolizidine Alkaloids written by L. B. Bull and published by . This book was released on 1968 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advances in Aggregation Induced Emission Materials in Biosensing and Imaging for Biomedical Applications - Part A by : Rajesh Bhosale
Download or read book Advances in Aggregation Induced Emission Materials in Biosensing and Imaging for Biomedical Applications - Part A written by Rajesh Bhosale and published by Elsevier. This book was released on 2021-11-08 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Aggregation Induced Emission Materials in Biosensing and Imaging for Biomedical Applications - Part A Volume 184, highlights many aspects of AIE materials that can help future investigators, researchers, students and stakeholders perform research with ease. Emitting light is a fascinating photophysical phenomenon, its different forms have brought the attention of various disciplines of natural sciences for centuries. In the modern era of scientific generation, short-lived fluorescence light and its long-lived counterpart phosphorescence light has been employed for several chemo-sensing, bio-sensing, and bioimaging applications. The aggregation induced emission (AIE) phenomenon has appeared as a wand of modern science to convert aggregation-caused quenching (ACQ) materials into AIE active materials for a wide range of biomedical applications including biosensing, bioimaging and localization of molecules for better understanding of molecular mechanisms. This volume covers a wide range of topics which are not currently available in a single volume, including ACQ & AIE concept development; intracellular pH, temperature and viscosity sensing; imaging of cell membrane, lipid droplet, lysosome, and mitochondria; biosensing and Imaging of bacteria; nucleus and nucleic acid imaging. Offers a basic understanding of AIE principle, mechanism and transformation of ACQ active to AIE active materials Elucidates nucleus and nucleic acid imaging applications of AIE active small molecules Describes imaging of cell membrane, lipid droplet, lysosome, and mitochondria of AIE molecules
Book Synopsis The logic of chemical synthesis by : E.J. Corey
Download or read book The logic of chemical synthesis written by E.J. Corey and published by Рипол Классик. This book was released on 1991 with total page 447 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Classics in Total Synthesis by : K. C. Nicolaou
Download or read book Classics in Total Synthesis written by K. C. Nicolaou and published by John Wiley & Sons. This book was released on 1996-04-11 with total page 826 pages. Available in PDF, EPUB and Kindle. Book excerpt: K.C. Nicolaou - Winner of the Nemitsas Prize 2014 in Chemistry This book is a must for every synthetic chemist. With didactic skill and clarity, K. C. Nicolaou and E. Sorensen present the most remarkable and ingenious total syntheses from outstanding synthetic organic chemists. To make the complex strategies more accessible, especially to the novice, each total synthesis is analyzed retrosynthetically. The authors then carefully explain each synthetic step and give hints on alternative methods and potential pitfalls. Numerous references to useful reviews and the original literature make this book an indispensable source of further information. Special emphasis is placed on the skillful use of graphics and schemes: Retrosynthetic analyses, reaction sequences, and stereochemically crucial steps are presented in boxed sections within the text. For easy reference, key intermediates are also shown in the margins. Graduate students and researchers alike will find this book a gold mine of useful information essential for their daily work. Every synthetic organic chemist will want to have a copy on his or her desk.
Book Synopsis Modern Physical Organic Chemistry by : Eric V. Anslyn
Download or read book Modern Physical Organic Chemistry written by Eric V. Anslyn and published by University Science Books. This book was released on 2006 with total page 1148 pages. Available in PDF, EPUB and Kindle. Book excerpt: In additionto covering thoroughly the core areas of physical organic chemistry -structure and mechanism - this book will escortthe practitioner of organic chemistry into a field that has been thoroughlyupdated.
Book Synopsis The Way of Synthesis by : Tomas Hudlicky
Download or read book The Way of Synthesis written by Tomas Hudlicky and published by Wiley-VCH. This book was released on 2007-09-04 with total page 1032 pages. Available in PDF, EPUB and Kindle. Book excerpt: This two-colored textbook presents not only synthetic ways to design organic compounds, it also contains a compilation of the most important total synthesis of the last 50 years with a comparative view of multiple designs for the same targets. It explains different tactics and strategies, making it easy to apply to many problems, regardless of the synthetic question in hand. Following a historical view of the evolution of synthesis, the book goes on to look at principles and issues impacting synthesis and design as well as principles and issues of methods. The sections on comparative design cover classics in terpenes and alkaloid synthesis, while a further section covers such miscellaneous syntheses as Maytansine, Palytoxin, Brevetoxin B and Indinavir. The whole is rounded off with a look at future perspectives and, what makes this textbook extraordinairy, with personal recollections of the chemists, who synthesized these fascinating compounds. With its attractive layout highlighting key parts and tactics using a second color, this is a useful tool for organic chemists, lecturers and students in chemistry, as well as those working in the chemical industry. "I think, as will many organic chemists, that the Hudlicky book will be the Bible of synthetic organic chemistry, the past, the present and the future. A hallmark publication." (Victor Snieckus)
Book Synopsis Molecules That Changed the World by : K. C. Nicolaou
Download or read book Molecules That Changed the World written by K. C. Nicolaou and published by Wiley-VCH. This book was released on 2008-03-17 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: K.C. Nicolaou - Winner of the Nemitsas Prize 2014 in Chemistry Here, the best-selling author and renowned researcher, K. C. Nicolaou, presents around 40 natural products that all have an enormous impact on our everyday life. Printed in full color throughout with a host of pictures, this book is written in the author's very enjoyable and distinct style, such that each chapter is full of interesting and entertaining information on the facts, stories and people behind the scenes. Molecules covered span the healthy and useful, as well as the much-needed and extremely toxic, including Aspirin, urea, camphor, morphine, strychnine, penicillin, vitamin B12, Taxol, Brevetoxin and quinine. A veritable pleasure to read.
Book Synopsis Classics in Total Synthesis II by : K. C. Nicolaou
Download or read book Classics in Total Synthesis II written by K. C. Nicolaou and published by Wiley-VCH. This book was released on 2003-10-17 with total page 639 pages. Available in PDF, EPUB and Kindle. Book excerpt: Classics in Total Synthesis II is the long awaited sequel to Classics in Total Synthesis, a book that has made its mark as a superb tool for educating students and practitioners alike in the art of organic synthesis since its introduction in 1996. In this highly welcomed second volume, K.C. Nicolaou and Scott A. Snyder discuss in detail the most impressive accomplishments in natural product total synthesis during the 1990s and the first years of the 21st century. While all of the features that made the first volume of Classics so popular and unique as a teaching tool have been maintained, in this new treatise the authors seek to present the latest techniques and advance in organic synthesis as they beautifully describe the works of some of the most renowned synthetic organic chemists of our time. Key features include: Systematically develops domino reactions, cascade sequences, biomimetic strategies, and asymmetric catalysis through the chosen synthesis Discusses cutting edge synthetic technologies in terms of mechanism and scope Presents new reactions, such as olefin metathesis, in mini-review style Includes abundant references for further reading CD with useful teaching material for lecturers is included with hardback version (ISBN 3-527-30685-4) Graduate students, educators, and researchers in the fields of synthetic and medicinal chemistry will wish to have a copy of this book in their collection as an indispensable companion that both augments and supplements the original Classics in Total Synthesis. From the reviews: "... a volume, (...) which any chemist with an interest in synthetic organic chemistry will wish to acquire." –JACS (on the previous volume) "...this superb book (...) will be an essential purchase for many organic chemists." –Nature (on the previous volume) "...Classics II is undoubtedly an excellent bargain that is highly recommended to everybody interested in advanced organic chemistry. One of my co-workers confessed that Classics I was the book on his bedside table while he prepared his thesis defense. Isn't that the highest distinction for a monograph? I have every reason to believe that Classics II will equally stand the selection process by students (and probably their supervisors too)." –Angewandte Chemie, 2004 "Well, there is a new pleasant read for the advanced student and even the experienced. It is the second volume to the established Classics in Total Synthesis and it continues the series extremely well." –ChemBioChem, 2004 "...the real innovation of this volume is the inclusion of alternative pathways to the same target molecule by other researchers. This enables the reader to appreciate that there are also other solutions to certain structural problems than those of the original synthesis. ... Let us hope that K. C. Nicolaou and his associates will present us with these future achievements in the same clear, informative and innovative format they have with the previous two volumes." –Applied Organometallic Chemistry
Book Synopsis Topics in Heterocyclic Chemistry by : Raymond Nielson Castle
Download or read book Topics in Heterocyclic Chemistry written by Raymond Nielson Castle and published by John Wiley & Sons. This book was released on 1969 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Handbook of Ion Chromatography by : Joachim Weiss
Download or read book Handbook of Ion Chromatography written by Joachim Weiss and published by . This book was released on 1986 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
