Download or read book Application of Steroselective Aldol Condensation Methodology to the Synthesis of Methynolide and Erythronolide A written by Steven Martin Hoagland and published by . This book was released on 1989 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1990 with total page 770 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fluorine and Health written by Alain Tressaud and published by Elsevier. This book was released on 2008-06-06 with total page 821 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluorine and Health presents a critical multidisciplinary overview on the contribution of fluorinated compounds to resolve the important global issue of medicinal monitoring and health care. The involved subjects are organized in three thematic parts devoted to Molecular Imaging, Biomedical Materials and Pharmaceuticals. Initially the key-position of partially fluorinated low molecular weight compounds labelled either with the natural 19F-isotope for Magnetic Resonance Imaging (MRI) or labelled with the radioactive [18F]-isotope for Positron Emission Tomography (PET) is highlighted. Both non-invasive methods belong to the most challenging in vivo imaging techniques in oncology, neurology and in cardiology for the diagnosis of diseases having the highest mortality in the industrialized countries. The manifold facets of fluorinated biomaterials range from inorganic ceramics to perfluorinated organic molecules. Liquid perfluorocarbons are suitable for oxygen transport and as potential respiratory gas carriers, while fluorinated polymers are connected to the pathology of blood vessels. Another important issue concerns the application of highly fluorinated liquids in ophthalmology. Moreover, fluorine is an essential trace element in bone mineral, dentine and tooth enamel and is applied for the prophylaxis and treatment of dental caries. The various origins of human exposure to fluoride species is detailed to promote a better understanding of the effect of fluoride species on living organisms.Medicinally relevant fluorinated molecules and their interactions with native proteins are the main focus of the third part. New molecules fluorinated in strategic position are crucial for the development of pharmaceuticals with desired action and optimal pharmacological profile. Among the hundreds of marketed active drug components there are more than 150 fluorinated compounds. The chapters will illustrate how the presence of fluorine atoms alters properties of bioactive compounds at various biochemical steps, and possibly facilitate its emergence as pharmaceuticals. Finally the synthetic potential of a fluorinase, the first C-F bond forming enzyme, is summarized. - New approach of topics involving chemistry, biology and medicinal techniques - Transdisciplinar papers on fluoride products - Importance of fluoride products in health - Updated data on specific topics
Download or read book Total Synthesis of Natural Products written by Stephen Hanessian and published by . This book was released on 1986 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Recent Progress in the Chemical Synthesis of Antibiotics written by Gabor Lukacs and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 808 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of antibiotics in the treatment by antibacterial and antifungal chemo therapy, has become standard practice since the end of World War Two and has had an enormous impact on healthcare throughout the world. Compounds belonging to this class have also reached an important place in the medical treatment of human cancer. Although, the discovery of most of these agents came from more or less sophisticated screening programs of soil microrganisms, many of the important antibiotics used today in clinical practice are derived from the original biosynthetic products by the application of often novel and generally elaborated chemical synthetic methodologies. In fact the antibiotics have represented (and still represent) for a generation of organic chemists an endless source of molecular structures whose varied assemblage of carbon atom backbones and chemical functions was beyond any possibility of imagination. Perhaps a similar repertoire of chemotypes was formerly offered by the natural products, namely the alkaloids, the terpenes, the vitamins and hormones as well as the pigments of the animal and plant kingdoms, albeit the chemical arrange ments of the antibiotic molecules appeared much more surprising and diverse to the admiring eyes of cultivated organic chemists. The idea of this book, certainly a landmark in the field, came during the Symposium of EUCHEM on Chemical Synthesis of Antibiotics, that was held at Aussois in Savoy, France (May 2-6, 1988), the initiative being taken by Gabor Lukacs to whom Masaji Ohno readily associated as a co-editor.
Download or read book Design and Strategy in Organic Synthesis written by Stephen Hanessian and published by Wiley-VCH. This book was released on 2013-09-03 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This long-awaited graduate level book, written by one of the world's leading organic chemists in collaboration with two of his former and present coworkers, adopts a refreshingly unique approach to synthesis planning and execution. Following an introductory look at the concept of synthesis, the authors discuss the Why, What, and How of organic synthesis as they apply to natural products. Although emphasis is on the Chiron Approach utilizing amino-acids, carbohydrates, hydroxy acids, terpenes, lactones and other naturally occurring small molecules as starting materials, catalytic asymmetric methods are also included as a corollary whenever relevant. A must-have source of first class information for everyone working in organic synthesis, be it in academia or industry. With a foreword by Larry E. Overman and David W. C. MacMillan
Download or read book Stereoselective Synthesis written by Mihály Nógrádi and published by John Wiley & Sons. This book was released on 2008-07-11 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: The state-of-the-art in stereoselective synthesis! Thoroughly revised and updated, this enlarged second edition offers a plethora of valuable information on methods and reagents in stereoselective synthesis. Methods have been selected for high efficiency and selectivity; mechanistic aspects are treated succinctly, with a strong emphasis on practical applications. For this new edition, material has been added on * homogeneous diastereoselective hydrogenations * enantioselective oxidations * novel, efficient chiral auxiliaries Much of the information given is presented in figures and tables, which makes the book a valuable reference work for the practically minded organic chemist. From reviews of the first edition: 'The extensive material in the volume should prove particularly useful to anyone involved in synthetic chemistry or teaching a course in organic chemistry.' Journal of Medicinal Chemistry 'With nearly 1400 references cited, the book contains a wealth of information and should be a useful addition to the chemist's library.' The American Scientist
Download or read book Aldol Reactions written by Rainer Mahrwald and published by Springer. This book was released on 2009-05-20 with total page 211 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aldol Reactions provides a comprehensive up-to-date overview of aldol reactions including application of different metal enolates; catalytic aldol additions catalyzed by different Lewis acids and Lewis bases; enantioselective direct aldol additions; antibodies and enzyme catalyzed aldol additions and the recent aggressive development of organocatalyzed aldol additions. The power of each method is demonstrated by several applications in total synthesis of natural products. The pros and cons of these methodologies with regard to stereoselectivity, regioselectivity and application in total synthesis of natural products are discussed. Great importance is set to the diverse possibilities of the manual of aldol reaction to install required configurations in complicated natural product synthesis.
Download or read book Modern Methods in Stereoselective Aldol Reactions written by Rainer Mahrwald and published by John Wiley & Sons. This book was released on 2013-02-22 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt: The selective formation of bondings between molecules is one of the major challenges in organic chemistry, and the so-called aldol reaction is one of the most important for this purpose. These reactions are a highly useful tool for developing such novel substances as natural products and pharmaceuticals. Likes its highly successful and much appreciated predecessor, "Modern Aldol Reactions", this ready reference provides a systematic overview of methodologies for installing a required configuration during an aldol addition step, but shifts the focus so as to cover the latest developments. As such, it presents a set of brand new tools, including vinylogous Mukaiyama-aldol reactions and substrate-controlled aldol reactions, as well as asymmetric induction in aldol additions. Furthermore, new developments in existing stereoselective aldol additions are described, such as the deployment of supersilyl groups or organocatalyzed aldol additions. All of these methodologies are presented in the context of their deployment in the total synthesis of natural products.
Download or read book Stereoselective Synthesis written by Robert S. Atkinson and published by . This book was released on 1995-09-13 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduces a new classification for stereoselective reactions based on the number of chiral centres contained in the starting material and the product. Based on stereochemical terms, this classification enables users to apply methods for the synthesis of target molecules.
