Novel-Type Dimeric Naphthylisoquinoline Alkaloids from Congolese Ancistrocladus Lianas PDF Download

Author: Blaise Kimbadi Lombe
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author: A. Douglas Kinghorn
Publisher: Springer Nature
ISBN: 3031104579
Category : Science
Languages : en
Pages : 344

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This book describes a unique class of secondary metabolites, the mono- and dimeric-naphthylisoquinoline alkaloids. They exclusively occur in lianas of the palaeotropical Ancistrocladaceae and Dioncophyllaceae plant families. Their unprecedented structures include stereogenic centers and rotationally hindered, and therefore stereogenic, axes. Extended recent investigations on six Ancistrocladus species from Asia, as reported in this contribution, shed light on their fascinating phytochemical productivity, with over 100 intriguing natural products. This high chemodiversity arises from a similarly unique biosynthesis from acetate-malonate units, following a novel polyketidic pathway to plant-derived isoquinoline alkaloids. Some of the compounds show most promising anti-parasitic activities. Additionally, strategies for the regio- and stereoselective total synthesis of the alkaloids, including the directed construction of the chiral axis, are also presented.

Author: Dieudonné Tshitenge Tshitenge
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author: Yongxian Cheng
Publisher: Springer Nature
ISBN: 9819973295
Category : Science
Languages : en
Pages : 351

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This book provides an overview of the new plant natural product skeletons discovered from 1999 to 2021. It categorizes these natural products by providing their names, source distributions, structural types, structure characteristics, and bioactivities. A total of 1373 plant products in 99 families are presented, which cover 36 different structure types within the Hypericaceae family of which the majority are alkaloid structures. In addition, it presents the biological profiling in the last 23 years by summarizing the biological activities and potential disadvantages. The new natural products skeleton presented are unprecedented structural scaffolds and could bring new opportunities for biological/pharmaceutical areas and provide new structure templates for synthetic chemists. This book helps readers gain in-depth insight into the past and recent trends of natural products; it also assists those interested in assessing the potential biological function of the natural products.

Author:
Publisher: Elsevier
ISBN: 0443295557
Category : Science
Languages : en
Pages : 446

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The Alkaloids: Chemistry and Biology, Volume 91, the newest release in a series that has covered the topic for more than 60 years, discusses key aspects of alkaloid chemistry, biology and pharmacology. Sections in this release include chapters on Recent Progress in the Chemistry of Naphthylisoquinoline Alkaloids. Provides the latest information on the study of alkaloids Covers alkaloid chemistry, biology, pharmacology, and medical applications Contains more than 80 published volumes in this interesting field of study

Author: A. Douglas Kinghorn
Publisher: Springer Nature
ISBN: 3030898733
Category : Science
Languages : en
Pages : 116

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This volume begins with a short history of malaria and follows with a summary of its biology. It then traces the fascinating history of the discovery of quinine for malaria treatment, and then describes quinine’s biosynthesis, its mechanism of action, and its clinical use, concluding with a discussion of synthetic antimalarial agents based on quinine’s structure. It also covers the discovery of artemisinin and its development as the source of the most effective current antimalarial drug, including summaries of its synthesis and biosynthesis, its mechanism of action, and its clinical use and resistance. A short discussion of other clinically used antimalarial natural products leads to a detailed treatment of additional natural products with significant antiplasmodial activity, classified by compound type. Although the search for new antimalarial natural products from Nature’s combinatorial library is challenging, it is very likely to yield new antimalarial drugs. This book thus ends by identifying ten natural products with development potential as clinical antimalarial agents.

Author: S. Gorog
Publisher: CRC Press
ISBN: 1351085875
Category : Science
Languages : en
Pages : 405

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This book provides an overview of the state of the art in pharmaceutical applications of UV-VIS spectroscopy. This book presents the fundamentals for the beginner and, for the expert, discusses both qualitative and quantitative analysis problems. Several chapters focus on the determination of drugs in various matrices, the coupling of chromatographic and spectrophotometric methods, and the problems associated with the use of chemical reactions prior to spectrophotometric measurements. The final chapter provides a survey of the spectrophotometric determination of the main families of drugs, emphasizing the achievements of the last decade.

Author: Tadeusz Aniszewski
Publisher: Elsevier
ISBN: 0080475337
Category : Science
Languages : en
Pages : 325

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Alkaloids, represent a group of interesting and complex chemical compounds, produced by the secondary metabolism of living organisms in different biotopes. They are relatively common chemicals in all kingdoms of living organisms in all environments. Two hundred years of scientific research has still not fully explained the connections between alkaloids and life. Alkaloids-Chemistry, Biological Significance, Applications and Ecological Role provides knowledge on structural typology, biosynthesis and metabolism in relation to recent research work on alkaloids. Considering an organic chemistry approach to alkaloids using biological and ecological explanation. Within the book several questions that persist in this field of research are approached as are some unresearched areas. The book provides beneficial text for an academic and professional audience and serves as a source of knowledge for anyone who is interested in the fascinating subject of alkaloids. Each chapter features an abstract. Appendices are included, as are a listing of alkaloids, plants containing alkaloids and some basic protocols of alkaloid analysis. * Presents the ecological role of alkaloids in nature and ecosystems * Interdisciplinary and reader friendly approach * Up-to-date knowledge

Author: World Health Organization
Publisher:
ISBN: 9789241565721
Category :
Languages : en
Pages : 224

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The World Malaria Report 2019 provides a comprehensive update on global and regional malaria data and trends. The report tracks investments in malaria programs and research as well as progress across all intervention areas: prevention, diagnosis, treatment, elimination, and surveillance. It also includes dedicated chapters on the consequences of malaria on maternal infant and child health the "High Burden to High Impact" approach as well as biological threats to the fight against malaria. The 2019 report is based on information received from more than 80 countries and areas with ongoing malaria transmission. This information is supplemented by data from national household surveys and databases held by other organizations.

Author: Choong Eui Song
Publisher: John Wiley & Sons
ISBN: 9783527628186
Category : Science
Languages : en
Pages : 546

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This comprehensive review of cinchona-based chiralilty inducers and their applications covers every topic, including ligands, immobilization and organocatalysis. Each chapter summarizes the scope and limitations of the new methods and technologies, while the final chapter contains carefully selected working procedures of cinchona alkaloid-promoted reactions organized according to reaction type. Invaluable reading for anyone wanting to learn about the current state of this hot topic.