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Author : 葉耀宗
Publisher :
ISBN 13 : 9781374763876
Total Pages : pages
Book Rating : 4.7/5 (638 download)
Download or read book Asymmetric Epoxidation of Unfunctionalized Olefins Catalyzed by Chiral Ketones written by 葉耀宗 and published by . This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Yiu-chung Yip
Publisher :
ISBN 13 :
Total Pages : 246 pages
Book Rating : 4.:/5 (513 download)
Download or read book Asymmetric Epoxidation of Unfunctionalized Olefins Catalyzed by Chiral Ketones written by Yiu-chung Yip and published by . This book was released on 1996 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : 黃文健
Publisher :
ISBN 13 : 9781374773295
Total Pages : pages
Book Rating : 4.7/5 (732 download)
Download or read book Design and Synthesis of Chiral Ketones for Catalytic Asymmetric Epoxidation of Unfunctionalized Olefins written by 黃文健 and published by . This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Man-kin Wong
Publisher :
ISBN 13 :
Total Pages : 296 pages
Book Rating : 4.:/5 (513 download)
Download or read book Design and Synthesis of Chiral Ketones for Catalytic Asymmetric Epoxidation of Unfunctionalized Olefins written by Man-kin Wong and published by . This book was released on 1996 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Virgil James Lee
Publisher :
ISBN 13 :
Total Pages : 298 pages
Book Rating : 4.F/5 ( download)
Download or read book Enantioselective Epoxidation of Unfunctionalized Olefins Catalyzed by Threitol-strapped Metalloporphyrins written by Virgil James Lee and published by . This book was released on 1992 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Christopher Patrick Burke
Publisher :
ISBN 13 :
Total Pages : 606 pages
Book Rating : 4.:/5 (183 download)
Download or read book Chiral Ketone-catalyzed Asymmetric Epoxidation of CIS-olefins written by Christopher Patrick Burke and published by . This book was released on 2007 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Andrei Russell Straumanis
Publisher :
ISBN 13 :
Total Pages : 306 pages
Book Rating : 4.F/5 ( download)
Download or read book Enantioselective Epoxidation of Unfunctionalized Olefins Catalyzed by Chiral Binaphthyl-strapped Metalloporphyrins written by Andrei Russell Straumanis and published by . This book was released on 1997 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Konstantin Bryliakov
Publisher : CRC Press
ISBN 13 : 1466588578
Total Pages : 166 pages
Book Rating : 4.4/5 (665 download)
Download or read book Environmentally Sustainable Catalytic Asymmetric Oxidations written by Konstantin Bryliakov and published by CRC Press. This book was released on 2014-09-17 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Catalysis plays a vital role in chemical, petroleum, agriculture, polymer, electronics, pharmaceutical, and other industries. Over 90 percent of chemicals originate from catalytic processes. Toughening economic and environmental constraints have proven to be a challenge for meeting the demand of novel efficient and sustainable regio- and stereoselective catalyst systems. Environmentally Sustainable Catalytic Asymmetric Oxidations provides a comprehensive overview of existing ecologically friendly catalyst systems for various asymmetric oxidation processes. Topics include: A survey of existing transition metal-based catalyst systems for asymmetric epoxidations (AEs) with O2 and H2O2 Asymmetric sulfoxidations with H2O2 on chiral metal complexes An overview of various transition metal-catalyzed oxidative transformations with H2O2 or O2 used as the terminal oxidant Organocatalytic asymmetric oxidations Catalytic processes of stereospecific oxidations of C-H functional groups The role that oxoiron(V) intermediates play in chemo- and stereoselective oxidations catalyzed by non-heme iron complexes The book concludes with a discussion of the opportunities and problems associated with the industrial application of stereoselective processes of catalytic oxidation with H2O2 and O2. It also provides examples of processes with industrial potential. Some of the catalysts presented in this book may serve as promising alternatives for existing catalysts—progressively replacing them in manufacturing processes and ultimately making the chemical industry greener and cleaner.
Author : Li Zeng
Publisher :
ISBN 13 :
Total Pages : 364 pages
Book Rating : 4.F/5 ( download)
Download or read book Metalloporphyrin-catalyzed Olefin Epoxidation written by Li Zeng and published by . This book was released on 2005 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : 何麗薇
Publisher : Open Dissertation Press
ISBN 13 : 9781374745230
Total Pages : pages
Book Rating : 4.7/5 (452 download)
Download or read book Asymmetric Epoxidation of Olefins Catalyzed by Chiral Iminium Salts Generated in Situ from Amines and Aldehydes written by 何麗薇 and published by Open Dissertation Press. This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Asymmetric Epoxidation of Olefins Catalyzed by Chiral Iminium Salts Generated in Situ From Amines and Aldehydes" by 何麗薇, Lai-mei, Ho, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. DOI: 10.5353/th_b3122604 Subjects: Alkenes - Oxidation Salts Catalysis
Author : Li Deng
Publisher :
ISBN 13 :
Total Pages : 288 pages
Book Rating : 4.:/5 (325 download)
Download or read book Biological and Synthetic Catalysts for Asymmetric Epoxidation of Unfunctionalized Olefins written by Li Deng and published by . This book was released on 1994 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : David Ager
Publisher : CRC Press
ISBN 13 : 1420027301
Total Pages : 632 pages
Book Rating : 4.4/5 (2 download)
Download or read book Handbook of Chiral Chemicals written by David Ager and published by CRC Press. This book was released on 2005-10-21 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt: As pharmaceutical companies look to develop single enantiomers as drug candidates, chemists are increasingly faced with the problems associated with this subclass of organic synthesis. "The Handbook of Chiral Chemicals, Second Edition" highlights the problems associated with the production of chiral compounds on a commercial scale. The handbook fir
Author : Wei Zhang
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (774 download)
Download or read book Asymmetric Catalytic Epoxidations of Simple Olefins written by Wei Zhang and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Two types of chiral (salen)Mn(III) complexes, either cationic or neutral, were synthesized by complexation of the corresponding chiral salen ligands with manganese salt. Neutral Mn(III) salen complexes were prepared from the ligands and $rm Mn(OAc)sb2{cdot}4Hsb2O$ via in situ aerial oxidation of the corresponding (salen)Mn(II) species. This approach circumvents the manipulation of highly air sensitive Mn(II) salen intermediates. The use of commercially available bleach solution as the oxidant greatly increases the practical value of this asymmetric epoxidation process. High enantioselectivities in alkene epoxidation, especially for cis-disubstituted olefins, has been achieved through a rational sequence of ligand modifications. A mechanism involving side-on approach of alkene to a Mn(V)-oxo intermediate accounts for the sense and degree of asymmetric induction with various types of olefins, and it provides a guideline for improving catalyst design. Electronic environment of the catalyst can dramatically affect the enantioselectivity of olefin epoxidation. Sterically non-biasing substituents were shown in the epoxidation of 2,2-dimethylchromene to effect a difference in $DeltaDelta{rm G}{spne}$ of 2.0 Kcal/mol, corresponding to a range in ee's from 22% to 96%. Increases in selectivity due to electron donating substituents are attributed to a more product-like transition structures in the ee-determining olefin oxidation step. Different reaction mechanisms are proposed for alkyl-substituted and aryl-substituted alkenes. Epoxidation of alkyl-substituted olefins is very likely to be a concerted oxygen transfer process, while a stepwise reaction mechanism is indicated with aryl-substituted olefins. A convenient and very inexpensive catalyst synthesis, a simple and practical epoxidation procedure, good catalyst turnovers, and high levels of asymmetric induction render the (salen)Mn(III) epoxidation system superior to any other catalytic or stoichiometric asymmetric processes for unfunctionalized olefins reported thus far. Widespread application of these catalysts may be foreseen.
Author : Lai-mei Ho
Publisher :
ISBN 13 :
Total Pages : 224 pages
Book Rating : 4.:/5 (521 download)
Download or read book Asymmetric Epoxidation of Olefins Catalyzed by Chiral Iminium Salts Generated in Situ from Amines and Aldehydes written by Lai-mei Ho and published by . This book was released on 2001 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Guo-Qiang Lin
Publisher : John Wiley & Sons
ISBN 13 : 1118075633
Total Pages : 469 pages
Book Rating : 4.1/5 (18 download)
Download or read book Chiral Drugs written by Guo-Qiang Lin and published by John Wiley & Sons. This book was released on 2011-08-08 with total page 469 pages. Available in PDF, EPUB and Kindle. Book excerpt: An integrated view of chiral drugs from concept and synthesisto pharmaceutical properties Chirality greatly influences a drug's biological and pharmacological properties. In an effort to achieve more predictable results from chiral drugs, the Food and Drug Administration now requires that these medicines be as pure as possible, which places great demands on drug synthesis, purification, analysis, and testing. To assist researchers in acquiring the essential knowledge to meet these rigid guidelines, Chiral Drugs focuses on three vital chiral technologies asymmetric synthesis, biocatalytic process, and chiral resolution to offer details on the basic concepts, key developments, and recent trends in chiral drug discovery, along with: The history of chiral drugs development and industrial applications of chiral technologies A section listing twenty-five approved or advanced-trial chiral drugs that lists each drug name, chemical name and properties, a representative synthetic pathway, pharmacological characterizations, and references An interdisciplinary approach combining synthetic organic chemistry, medicinal chemistry, and pharmacology Nearly two-thirds of the drugs on today's market are chiral drugs. Reducing and eliminating their negative characteristics is an ongoing and serious challenge for the pharmaceutical industry. With its well-balanced approach to covering each important aspect of chirality, Chiral Drugs champions important strategies for tipping the medical scale in a positive direction for the production of more effective and safer drugs.
Author : Elias J. Corey
Publisher : Elsevier
ISBN 13 : 0128001518
Total Pages : 334 pages
Book Rating : 4.1/5 (28 download)
Download or read book Enantioselective Chemical Synthesis written by Elias J. Corey and published by Elsevier. This book was released on 2013-10-23 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by world-renowned and best-selling experts, Nobel Laureate E. J. Corey and Laszlo Kurti, Enantioselective Chemical Synthesis offers an authoritative and comprehensive overview of the field’s progress; the processes and tools for key formations; future development for complex, stereocontrolled (enantiomeric or diastereoisomeric) molecules; and valuable examples of multi-step syntheses. Utilizing a color-coded scheme to illustrate chemical transformations, Enantioselective Chemical Synthesis provides clear explanation and guidance through vital asymmetrical syntheses and insight into the next steps for the field. Researchers, professionals, and academics will benefit from this valuable, thorough, and unique resource. In Part I, the authors present clearly, comprehensively and concisely the most useful enantioselective processes available to synthetic chemists. Part II provides an extensive discussion of the most logical ways to apply these new enantioselective methods to the planning of syntheses of stereochemically complex molecules. This hitherto neglected area is essential for the advancement of enantioselective synthesis to a more rational and powerful level. Part III describes in detail many reaction sequences which have been used successfully for the construction of a wide variety of complex target molecules Clearly explains stereochemical synthesis in theory and practice Provides a handy tool box for scientists wishing to understand and apply chiral chemical synthesis Describes almost 50 real life examples of asymmetric synthesis in practice and examines how the chiral centers were introduced at key synthetic stages
Author : Abdulwali H. Aldahmash
Publisher :
ISBN 13 :
Total Pages : 174 pages
Book Rating : 4.:/5 (464 download)
Download or read book The Effect of Electronically Different Chiral Manganese Tetraphenylporphyrins on the Asymmetric Epoxidation of Unfunctionalized Olefins written by Abdulwali H. Aldahmash and published by . This book was released on 1993 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
