Development Of Novel Routes And Methods For The Semisynthesis Of The Marine Steroid Demethylgorgosterol And Unnatural Analogs

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Development of Novel Routes and Methods for the Semisynthesis of the Marine Steroid Demethylgorgosterol and Unnatural Analogs

Author : Nicolai Rosenbaum
Publisher : Logos Verlag Berlin GmbH
ISBN 13 : 3832555161
Total Pages : 300 pages
Book Rating : 4.8/5 (325 download)

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Book Synopsis Development of Novel Routes and Methods for the Semisynthesis of the Marine Steroid Demethylgorgosterol and Unnatural Analogs by : Nicolai Rosenbaum

Download or read book Development of Novel Routes and Methods for the Semisynthesis of the Marine Steroid Demethylgorgosterol and Unnatural Analogs written by Nicolai Rosenbaum and published by Logos Verlag Berlin GmbH. This book was released on 2022-07-22 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gorgosterol and its derivative demethylgorgosterol are two long known marine steroids with unusual properties and a unique structure, containing a cyclopropane moiety in the side chain. Gorgosterol and its derivatives show diverse structural motives and biological activities. Moreover, corals and coral reefs have a tremendous ecological and economic impact but are endangered by climate change. A better understanding of corals can therefore aid their protection and conservation. A concise and high yielding formal semisynthesis for the marine steroid demethylgorgosterol was developed. Centerpiece was a stereoselective intermolecular cyclopropanation. A variety of demethylgorgosterol analogs were synthesized for biological applications. These include hydrocarbon analogs, diversely functionalized analogs, and fluorophore-steroid conjugates to track and visualize steroids in vivo. Finally, a new method for the synthesis of 3-cyclopropylacrylates was developed. Here, a vinylogous diazoester was utilized to cyclopropanate alkenes. The observed cis-selectivity was explained with π-π-interactions in the transition state.

Iron and Cobalt Catalysts

Author : Wilson D. Shafer
Publisher : MDPI
ISBN 13 : 303928388X
Total Pages : 414 pages
Book Rating : 4.0/5 (392 download)

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Book Synopsis Iron and Cobalt Catalysts by : Wilson D. Shafer

Download or read book Iron and Cobalt Catalysts written by Wilson D. Shafer and published by MDPI. This book was released on 2020-06-23 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the turn of the last century when the field of catalysis was born, iron and cobalt have been key players in numerous catalysis processes. These metals, due to their ability to activate CO and CH, haev a major economic impact worldwide. Several industrial processes and synthetic routes use these metals: biomass-to-liquids (BTL), coal-to-liquids (CTL), natural gas-to-liquids (GTL), water-gas-shift, alcohol synthesis, alcohol steam reforming, polymerization processes, cross-coupling reactions, and photocatalyst activated reactions. A vast number of materials are produced from these processes, including oil, lubricants, waxes, diesel and jet fuels, hydrogen (e.g., fuel cell applications), gasoline, rubbers, plastics, alcohols, pharmaceuticals, agrochemicals, feed-stock chemicals, and other alternative materials. However, given the true complexities of the variables involved in these processes, many key mechanistic issues are still not fully defined or understood. This Special Issue of Catalysis will be a collaborative effort to combine current catalysis research on these metals from experimental and theoretical perspectives on both heterogeneous and homogeneous catalysts. We welcome contributions from the catalysis community on catalyst characterization, kinetics, reaction mechanism, reactor development, theoretical modeling, and surface science.

Bioactive Heterocycles

Author : K. L. Ameta
Publisher : Nova Science Publishers
ISBN 13 : 9781622576364
Total Pages : 0 pages
Book Rating : 4.5/5 (763 download)

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Book Synopsis Bioactive Heterocycles by : K. L. Ameta

Download or read book Bioactive Heterocycles written by K. L. Ameta and published by Nova Science Publishers. This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a critical and lucid account of various synthetic methodologies and biological activities of different sized bioactive heterocyclic compounds. In effect, this book imparts a great deal of comprehensive reviews about the chemistry and biology of selected groups of heterocycles and natural products including important pharmaceuticals as well as agrochemical pesticides in one handy project. Besides, this compendious effort encompasses different methods of synthesis and biological evaluation of heterocyclic compounds. The main purpose of this book is to share the recent advances and scope of Bioactive Heterocycles for the future avenues in the field. It has specifically been designed by keeping in mind the wide interests of individuals engaged in the design and synthesis of biologically active heterocyclic compounds as well as research scientists in academia and industry. The authors expect this book to be a standard reference in Universities and industrial libraries.