Part I: Studies Towards the Total Synthesis of Zoanthamine Alkaloids Part II: Total Synthesis of (-)-lankacyclinol
Author | : Guillermo Stanley Cortez Veliz |
Publisher | : |
Total Pages | : 380 |
Release | : 2000 |
Genre | : |
ISBN | : |
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Author | : Guillermo Stanley Cortez Veliz |
Publisher | : |
Total Pages | : 380 |
Release | : 2000 |
Genre | : |
ISBN | : |
Author | : |
Publisher | : |
Total Pages | : 1846 |
Release | : 2001 |
Genre | : Chemistry |
ISBN | : |
Faculties, publications and doctoral theses in departments or divisions of chemistry, chemical engineering, biochemistry and pharmaceutical and/or medicinal chemistry at universities in the United States and Canada.
Author | : Majid M. Heravi |
Publisher | : Elsevier |
Total Pages | : 404 |
Release | : 2021-06-12 |
Genre | : Science |
ISBN | : 0128242582 |
Recent Applications of Selected Name Reactions in the Total Synthesis of Alkaloids includes comprehensive coverage of name reactions in the synthesis of alkaloids. This book highlights the synthesis of various alkaloids using special name reactions including the Diels-Alder, Friedel-Crafts, Heck, Mannich, Pauson-Khand, Pictet-Spengler, Sonogashira and Suzuki reactions. In this book, some selected name reactions in the total synthesis of alkaloids are covered, as they can be used as the key step/steps in the synthesis of different alkaloids exhibiting various biological activities. All chapters include an introduction, history and mechanism of the name reaction, and present the origin of the natural product and its known biological activities. The pathway to total synthesis is visually illustrated, and the focus is on the step in which a name reaction is applied. Chemists working in the area of synthetic organic chemistry will find this reference useful, as well as those working to develop novel methodologies for the synthesis of natural products in both academia and industry. This book is also beneficial to biologists, pharmacists and botanists. - Includes an introduction of alkaloids, their origins and biological properties - Features the applications of special name reactions as the key step in the total synthesis of featured alkaloids - Covers the pathway for the synthesis of alkaloids from commercially available or easily accessible starting materials by using at least one name reaction to achieve the desired target products
Author | : Hans-Joachim Knölker |
Publisher | : Springer Science & Business Media |
Total Pages | : 268 |
Release | : 2012-01-10 |
Genre | : Science |
ISBN | : 3642255299 |
Lycopodium Alkaloids: Isolation and Asymmetric Synthesis, by Mariko Kitajima and Hiromitsu Takayama.- Synthesis of Morphine Alkaloids and Derivatives, by Uwe Rinner and Tomas Hudlicky.- Indole Prenylation in Alkaloid Synthesis, by Thomas Lindel, Nils Marsch and Santosh Kumar Adla.- Marine Pyrroloiminoquinone Alkaloids, by Yasuyuki Kita and Hiromichi Fujioka.- Synthetic Studies on Amaryllidaceae and Other Terrestrially Derived Alkaloids, by Martin G. Banwell, Nadia Yuqian Gao, Brett D. Schwartz and Lorenzo V. White.- Synthesis of Pyrrole and Carbazole Alkaloids, by Ingmar Bauer and Hans-Joachim Knölker.-
Author | : J.D. Phillipson |
Publisher | : Springer Science & Business Media |
Total Pages | : 315 |
Release | : 2012-12-06 |
Genre | : Science |
ISBN | : 3642701280 |
Isoquinolines form one of the largest groups of plant alkaloids and they in clude a number of valuable clinical agents such as codeine, morphine, eme tine and tubocurarine. Research into different aspects of isoquinolines con tinues in profusion, attracting the talents of botanists, chemists, bioche mists, analysts, pharmacists and pharmacologists. Many of these aspects are of an interdisciplinary nature, and in April 1984, The Phytochemical Society of Europe arranged a 3-day symposium on The Chemistry and Bi ology of Isoquinoline Alkaloids in order to provide a forum for scientists of differing disciplines who are united by a common interest in this one class of natural product. Each chapter in this volume is based on a lecture given at this symposium. Attempts have been made to make the aims and objectives, experimental findings and conclusions reached, intelligible to scientists of differing backgrounds. The introductory chapter, which is mainly based on a historical discus sion, stresses that plants containing isoquinolines have proved to be both a boon and a curse to mankind. The Opium Poppy, Papaver somniferum, produces the medicinally used alkaloids morphine, codeine, noscapine and papaverine whilst it also continues to provide drugs of abuse, particularly morphine and its readily prepared O,O-diacetyl derivative, heroin. Numer ous other alkaloids have been isolated from other members of the Papaver acea, and a knowledge of their presence and distribution within the various species has proved a useful adjunct to systematic botanical studies.
Author | : Yuqian Gao |
Publisher | : |
Total Pages | : 0 |
Release | : 2018 |
Genre | : |
ISBN | : |
In 2005 Ünver and Kaya reported that ethanolic extraction of the dried and powdered total plant material derived from Galanthus gracilis, a Turkish member of the Amaryllidaceae family, lead to the isolation of gracilamine and to which the unprecedented structure 1.1 was assigned on the basis of extensive NMR spectroscopic and mass spectrometric analyses. This compound represents the first example of a pentacyclic dinitrogenous alkaloid isolated from the Amaryllidaceae family. It embodies five rings and seven stereocentres. The ethyl ester moiety associated with compound 1.1 is almost certainly an artifact of the isolation process, the naturally occurring alkaloid presumably being either another ester or the corresponding free acid. This rather complex structure together with the author's previous [BSc(Hons.)] studies made its total synthesis a topic of considerable interest. Chapter One provides a brief introduction to the isolation, structural elucidation, proposed biogenesis, and previous total syntheses of gracilamine. It also details earlier relevant work carried out by the author. Chapter Two details a model study involving a Pd-catalysed intramolecular Alder-ene (IMAE) reaction that delivers a substrate used for testing the crucial intramolecular [3+2]cycloaddition process. By such means the basic framework, 2.24, of gracilamine was established. Chapter Three outlines the difficulties encountered in efforts to extend the abovementioned model studies in establishing a total synthesis of gracilamine. Despite this, one of these "difficulties" could be parlayed in the establishment of a ten-step total synthesis of the racemic modification of the alkaloid (±)-3-O-demethylmacronine (1.68). Chapter Four details the completion of a total synthesis of gracilamine. The final route proceeded in just eleven steps and so representing the shortest route to the title alkaloid reported thus far in this active area of research. Chapter Five presents the experimental procedures and data underpinning all of the work and conclusions detailed in Chapters Two, Three and Four.
Author | : Junpei Matsuoka |
Publisher | : Springer Nature |
Total Pages | : 91 |
Release | : 2020-09-18 |
Genre | : Science |
ISBN | : 9811586527 |
This book explores efficient syntheses of indole alkaloids based on gold-catalyzed cascade cyclizations, presenting two strategies for total synthesis of these natural products based on gold-catalyzed reactions of conjugated diyne or ynamide. The book first describes the total and formal synthesis of dictyodendrins A–F based on direct construction of the pyrrolo[2,3-c]carbazole core using the gold-catalyzed annulation of azido-diynes and protected pyrrole. This synthetic strategy features late-stage functionalization of the pyrrolo[2,3-c]carbazole scaffold at several positions and allows diverse access to dictyodendrins and their derivatives. Secondly, the book discusses the formal synthesis of vindorosine based on the pyrrolo[2,3-d]carbazole construction using the gold-catalyzed cascade cyclization of ynamide. Importantly, the reaction using a chiral gold complex provides the optically active pyrrolo[2,3-d]carbazole. This strategy facilitates the rapid construction of the pyrrolocarbazole core structure of aspidosperma and related alkaloids, including vindorosine. These methodologies can accelerate the medicinal application of pyrrolocarbazole-type alkaloids and related compounds.