Download or read book Some Experiments Relating to the Total Synthesis of Steroids written by Derek Walter Oakes and published by . This book was released on 1955 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Object of this research has been to study methods of building up the five-membered D ring of the steroid nucleus upon certain tricyclicketoethers (I) previously prepared in this laboratory (1,2). Transformations of this type have been reported by several groups of chemists, and we have attempted to valuate these methods and possibly modify one of them to serve our purpose. Since the tricyclicketoethers are difficult to prepare, we have used cyclohexanone as a model compound.
Download or read book Total Synthesis of Steroids written by Robert T. Blickenstaff and published by Academic Press. This book was released on 2013-10-22 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt: Organic Chemistry, Volume 30: Total Synthesis of Steroids provides an overall view of steroid total synthesis, including the general approaches, special problems, stereochemical complexities, expansion or contraction of rings, and insertion of hetero atoms. The book discusses the process of designing total syntheses; the biogenetic-like steroid synthesis, including cyclization of terminal epoxides as well as the total synthesis from nonepoxide precursors; and the synthesis of equilenin, estrone, bisdehydrodoisynolic acid, 18,19-bisnorprogesterone, 19-norpregnanes, and heterocyclic steroids. The text also describes the application of ABD intermediates in the Torgov synthesis; the synthesis of carbocyclics and thiasteroids; and the synthesis from p-anisylcyclohexanes and from C-5, C-8 bridged intermediates. The synthesis based on the type of reaction used in the condensation of the A fragment with the CD portion, as well as the methods of total synthesis in the preparation of 8-azasteroids and 8,13-diazasteroids are also considered. The book further tackles the synthesis of epiandrosterone, cortisone, aldosterone, 3ß-hydroxy-5a-pregnan-20-one, latifoline, conessine, and ring C aromatic steroids; the synthesis of trans-benzohydrindane derivatives and other common derivatives; and the synthesis of CD intermediates. Chemists, biochemists, and people involved in the study of steroid total syntheses will find the book invaluable.
Download or read book Total Steroid Synthesis written by A. A. Akhrem and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the appearance of the Russian edition of this monograph (1967), the main tendencies of the development of total synfuesis have not changed. The accelerated accumulation of experimental material is continuing, mainly in the form of the improvement of already-existing synthesis schemes. The main new advance is the development of asymmetric syn theses with intermediates that have made it possible to avoid the main dis advantage of total synthesis - the formation of racemic final compounds. The most important work that has appeared since the appearance of the Russian edition is given in an Appendix to the book. Apart from this, only a very slight rearrangement of the material and of some of the schemes has been carried out for the American edition. A. A. Akhrem Yu. A. Titov Moscow, July 1968 v Preface to the Russian Edition Steroids are one of the most interesting and most widely distributed and, at the same time, one of the most structurally complex groups of natural compounds. In spite of this, the great theoretical and practical importance of steroids for biology and medicine has led to very intensive scientific research work on their synthesis. The numerous methods for obtaining steroids developed at the present time can be divided into four main groups: isolation from natural sources, microbiological synthesis, partial synthesis from natural raw material already containing the steroid skeleton, and, finally, total chemical synthesis from precursors of com paratively simple structure.
Download or read book Basic Principles of Organic Chemistry written by John D. Roberts and published by . This book was released on 1977 with total page 1596 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction what is organic chemistry all about?; Structural organic chemistry the shapes of molecules functional groups; Organic nomenclature; Alkanes; Stereoisomerism of organic molecules; Bonding in organic molecules atomic-orbital models; More on nomenclature compounds other than hydrocarbons; Nucleophilic substitution and elimination reactions; Separation and purification identification of organic compounds by spectroscopic techniques; Alkenes and alkynes. Ionic and radical addition reactions; Alkenes and alkynes; Oxidation and reduction reactions; Acidity or alkynes.
Download or read book Master s Theses and Doctoral Dissertations in the Pure and Applied Sciences Accepted by Colleges and Universities of the United States written by and published by . This book was released on 1955 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemistry of Plant Natural Products written by Sunil Kumar Talapatra and published by Springer. This book was released on 2015-03-05 with total page 1197 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aimed at advanced undergraduate and graduate students and researchers working with natural products, Professors Sunil and Bani Talapatra provide a highly accessible compilation describing all aspects of plant natural products. Beginning with a general introduction to set the context, the authors then go on to carefully detail nomenclature, occurrence, isolation, detection, structure elucidation (by both degradation and spectroscopic techniques) stereochemistry, conformation, synthesis, biosynthesis, biological activity and commercial applications of the most important natural products of plant origin. Each chapter also includes detailed references (with titles) and a list of recommended books for additional study making this outstanding treatise a useful resource for teachers of chemistry and researchers working in universities, research institutes and industry.
Download or read book The Biology of Cholesterol and Related Steroids written by N. B. Myant and published by Butterworth-Heinemann. This book was released on 2014-04-24 with total page 925 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Biology of Cholesterol and Related Steroids focuses on the study of sterols in relation to living organisms. The publication first takes a look at the analysis of sterols and related steroids and the distribution of sterols and related steroids in nature, as well as the processes of extraction and separation and presence of sterols in plants, fungi, vertebrates, and invertebrates. The text then ponders on biosynthesis of sterols and metabolism of cholesterol. Topics include formation of fatty acid esters of cholesterol, steroid hormones, biosynthetic pathway to sterols, reaction mechanisms, and comparative aspects of sterol synthesis. The manuscript examines the developmental aspects of cholesterol metabolism and sterols in biological membranes. The book also reviews cholesterol synthesis in animal tissues, sterol metabolism in isolated cells, and epidemiology of the plasma cholesterol. Discussions focus on selection of statistical populations, genetic influences, regulation of sterol synthesis, general aspects of sterol metabolism, and removal of cell cholesterol in vivo. The publication is a dependable source of data for biochemists and readers interested in the biology of cholesterol and steroids.
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.
Download or read book Masters Theses and Doctoral Dissertations in the Pure and Applied Sciences Accepted by Colleges and Universities of the United States written by and published by . This book was released on 1957 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cyclopenta a phenanthrenes written by Maurice M. Coombs and published by CUP Archive. This book was released on 1987 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of the Chemical Society written by Chemical Society (Great Britain) and published by . This book was released on 1957 with total page 1448 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Titles of chemical papers in British and foreign journals" included in Quarterly journal, v. 1-12.
Download or read book Proceedings of the Fourth International Congress on Hormonal Steroids written by V. H. T. James and published by Elsevier. This book was released on 2013-10-22 with total page 992 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the Fourth International Congress on Hormonal Steroids contains plenary speeches and symposia from the Fourth International Congress on Hormonal Steroids held in Mexico City in September 1974
Download or read book Research Grants Index written by National Institutes of Health (U.S.). Division of Research Grants and published by . This book was released on 1975 with total page 1224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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:
Download or read book Metabolism of Anabolic Androgenic Steroids written by Victor A. Rogozkin and published by CRC Press. This book was released on 1991-06-14 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents an authoritative review of the research regarding the influences of anabolic-androgenic steroids on metabolism. The book provides a concise description of the biochemistry of these steroids using simple terms and includes methods of separation and their clinical applications. The first section of the book examines the general structure, nomenclature, and classification of anabolic-androgenic steroids. Subsequent chapters explore concepts basic to understanding the pathways of their metabolism in both target and non-target tissues, including the interactions of steroids with receptors and the effects of steroids on the cellular metabolism of skeletal muscle. The changes and molecular base of modifications in metabolism during exercise involving anabolic-androgenic steroids are also described. Finally, a comprehensive review of methods for scanning and identifying anabolic-androgenic steroids in biological fluids is presented, as well as a discussion regarding the applicability and limitations of these techniques. The book provides valuable reference information for all scientists and clinicians engaged in sports medicine, exercise biochemistry, and endocrinology.
Download or read book Steroid Hormones and Brain Function written by Charles H. Sawyer and published by Univ of California Press. This book was released on 1971 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1988 with total page 1684 pages. Available in PDF, EPUB and Kindle. Book excerpt:
