Download or read book New Catalysts for Asymmetric Nitrene Transfer Based on Ion pairing Between Sulfonated Rhodium II II Tetracarboxylates and Chiral Cations written by Alexander Fanourakis and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book New Chiral Rhodium II Catalysts for Asymmetric Synthesis with A diazocarbonyl Substrates written by Nicolas François Marie Pierson and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book New Chiral Rhodium II Catalysts for Asymmetric Synthesis with Apha diazocarbonyl Substrates written by Nicolas Pierson and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Catalytic Asymmetric Nitrene Transfer Reactions written by Pavandeep S. Aujla and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Asymmetric Nitrene Transfer Reactions with Azides Via Co II Based Metalloradical Catalysis MRC written by Jingran Tao and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Asymmetric nitrene transfer reactions via metalloradical catalysis (MRC) with azides has attracted research interest because of its fundamental and practical importance. The resulting nitrogen-containing units are recurrent motifs in biologically important molecules and can serve as versatile precursors in organic synthesis. The [Co(D2-Por*)] have emerged as a new class of catalysts for asymmetric aziridination and C-H amination. These metalloradical catalysts have been shown to be highly effective for the asymmetric intermolecular aziridination of a broad scope of substrates with different classes of azides with excellent to good enantioselectivity. The intramolecular C-H amination utilizing various azides can allow for the construction of diverse nitrogen containing heterocyclic compounds.
Download or read book Novel Chiral Rhodium II Carboxylates as Catalysts in Asymmetric Cyclopropanations written by Paul Richard Bruzinski and published by . This book was released on 1997 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of Silver catalyzed Chemo Regio and Enantioselective Nitrene Transfer Reactions Through Rational Catalyst Design written by Minsoo Ju and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The development of selective C-N bond forming reactions represents an important research area because amines are prevalent in biologically active natural products, pharmaceuticals, agrochemicals, and ligands. Traditionally, the reactivity and selectivity of amine-forming reactions had a strong dependence on pre-functionalized starting materials which resulted in costly chemical steps. More direct C-H amination or C=C bond aziridination reactions via transition metal-catalyzed nitrene transfer have been brought to the synthetic community's attention recently for their potential to efficiently form valuable C-N bonds. Unfortunately, the development of efficient NT methods has been met with several challenges including substrate-dependent selectivity and the need for costly transition metal catalysts. The work described herein represents a new approach to these reactions in which rationally designed silver catalysts are utilized to achieve high chemo-, regio- and ultimately, enantioselectivity in a catalyst-controlled manner. Chapter 1 serves as an introduction by providing a selected review of literature on recent asymmetric metal-catalyzed nitrene transfer reactions emphasizing the common catalyst design strategies to solve problems associated with selectivity and reactivity. Chapter 2 describes a method for chemo- and enantioselective silver-catalyzed nitrene transfer in which homoallylic carbamates are transformed into [4.1.0]-carbamate-tethered aziridines in good yields and enantiomeric excess (ee) via intramolecular aziridination. The aziridine products undergo nucleophilic ring-opening to yield enantioenriched amines with no erosion in stereochemical integrity. Chapter 3 presents two complementary silver catalysts that are capable of selecting between [Beta] or [gamma] C(sp3)-H bonds residing in similar steric/electronic environments, overriding reaction at a weaker C-H bond in favor of a stronger one, and activating primary C-H bonds. Further experimental and computational studies revealed some mechanistic insights into this system and what seems to be causing this interesting catalyst-controlled regioselectivity. Finally, Chapter 4 offers an extension of the regioselective silver-catalyzed NT, where [gamma]-propargylic-[gamma]-amino alcohol motifs are synthesized with high site- and enantioselectivity. The protocol was enabled by a new optically active bis(oxazoline) ligand designed via a rapid structure-activity relationship analysis.
Download or read book Asymmetric Organocatalysis Combined with Metal Catalysis written by Bruce A. Arndtsen and published by Springer Nature. This book was released on 2020-04-24 with total page 211 pages. Available in PDF, EPUB and Kindle. Book excerpt: The series Topics in Current Chemistry Collections presents critical reviews from the journal Topics in Current Chemistry organized in topical volumes. The scope of coverage is all areas of chemical science including the interfaces with related disciplines such as biology, medicine and materials science. The goal of each thematic volume is to give the non-specialist reader, whether in academia or industry, a comprehensive insight into an area where new research is emerging which is of interest to a larger scientific audience.Each review within the volume critically surveys one aspect of that topic and places it within the context of the volume as a whole. The most significant developments of the last 5 to 10 years are presented using selected examples to illustrate the principles discussed. The coverage is not intended to be an exhaustive summary of the field or include large quantities of data, but should rather be conceptual, concentrating on the methodological thinking that will allow the non-specialist reader to understand the information presented. Contributions also offer an outlook on potential future developments in the field.The chapter "Enamine/Transition Metal Combined Catalysis: Catalytic Transformations Involving Organometallic Electrophilic Intermediates" is available open access under a CC BY 4.0 License via link.springer.com.
Download or read book Iron Catalysis written by Bernd Plietker and published by Springer Science & Business Media. This book was released on 2011-01-05 with total page 227 pages. Available in PDF, EPUB and Kindle. Book excerpt: Juan I. Padrón and Víctor S. Martín: Catalysis by means of Fe-based Lewis acids; Hiroshi Nakazawa*, Masumi Itazaki: Fe–H Complexes in Catalysis; Kristin Schröder, Kathrin Junge, Bianca Bitterlich, and Matthias Beller: Fe-catalyzed Oxidation Reactions of Olefins, Alkanes and Alcohols: Involvement of Oxo- and Peroxo Complexes; Chi-Ming Che, Cong-Ying Zhou, Ella Lai-Ming Wong: Catalysis by Fe=X Complexes (X=NR, CR2); René Peters, Daniel F. Fischer and Sascha Jautze: Ferrocene and Half Sandwich Complexes as Catalysts with Iron Participation; Markus Jegelka, Bernd Plietker: Catalysis by Means of Complex Ferrates.
Download or read book Luminescent and Photoactive Transition Metal Complexes as Biomolecular Probes and Cellular Reagents written by Kenneth Kam-Wing Lo and published by Springer. This book was released on 2015-06-30 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: The series Structure and Bonding publishes critical reviews on topics of research concerned with chemical structure and bonding. The scope of the series spans the entire Periodic Table and addresses structure and bonding issues associated with all of the elements. It also focuses attention on new and developing areas of modern structural and theoretical chemistry such as nanostructures, molecular electronics, designed molecular solids, surfaces, metal clusters and supramolecular structures. Physical and spectroscopic techniques used to determine, examine and model structures fall within the purview of Structure and Bonding to the extent that the focus is on the scientific results obtained and not on specialist information concerning the techniques themselves. Issues associated with the development of bonding models and generalizations that illuminate the reactivity pathways and rates of chemical processes are also relevant. The individual volumes in the series are thematic. The goal of each volume is to give the reader, whether at a university or in industry, a comprehensive overview of an area where new insights are emerging that are of interest to a larger scientific audience. Thus each review within the volume critically surveys one aspect of that topic and places it within the context of the volume as a whole. The most significant developments of the last 5 to 10 years should be presented using selected examples to illustrate the principles discussed. A description of the physical basis of the experimental techniques that have been used to provide the primary data may also be appropriate, if it has not been covered in detail elsewhere. The coverage need not be exhaustive in data, but should rather be conceptual, concentrating on the new principles being developed that will allow the reader, who is not a specialist in the area covered, to understand the data presented. Discussion of possible future research directions in the area is welcomed. Review articles for the individual volumes are invited by the volume editors. Readership: research scientists at universities or in industry, graduate students Special offer For all customers who have a standing order to the print version of Structure and Bonding, we offer free access to the electronic volumes of the Series published in the current year via SpringerLink.
Download or read book Mixed Matrix Membranes written by Clara Casado-Coterillo and published by MDPI. This book was released on 2019-12-16 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mixed matrix membranes (MMMs) have attracted a large amount of interest in research laboratories worldwide in recent decades, motivated by the gap between a growing interest in developing novel mixed matrix membranes by various research groups and the lack of large-scale implementation. This Special Issue contains six publications dealing with the current opportunities and challenges of mixed matrix membranes development and applications to solve environmental and health challenges of the society of 21st century.
Download or read book Catalytic Asymmetric Synthesis written by Takahiko Akiyama and published by John Wiley & Sons. This book was released on 2022-05-27 with total page 798 pages. Available in PDF, EPUB and Kindle. Book excerpt: Catalytic Asymmetric Synthesis Seminal text presenting detailed accounts of the most important catalytic asymmetric reactions known today This book covers the preparation of enantiomerically pure or enriched chemical compounds by use of chiral catalyst molecules. While reviewing the most important catalytic methods for asymmetric organic synthesis, this book highlights the most important and recent developments in catalytic asymmetric synthesis. Edited by two well-qualified experts, sample topics covered in the work include: Metal catalysis, organocatalysis, photoredox catalysis, enzyme catalysis C–H bond functionalization reactions Carbon–carbon bond formation reactions, carbon–halogen bond formation reactions, hydrogenations, polymerizations, flow reactions Axially chiral compounds Retaining the best of its predecessors but now thoroughly up to date with the important and recent developments in catalytic asymmetric synthesis, the 4th edition of Catalytic Asymmetric Synthesis serves as an excellent desktop reference and text for researchers and students, from upper-level undergraduates all the way to experienced professionals in industry or academia.
Download or read book Aziridines and Epoxides in Organic Synthesis written by Andrei K. Yudin and published by John Wiley & Sons. This book was released on 2006-02-20 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aziridines and epoxides are among the most widely used intermediates in organic synthesis, acting as precursors to complex molecules due to the strains incorporated in their skeletons. Besides their importance as reactive intermediates, many biologically active compounds also contain these three-membered rings. Filling a gap in the literature, this clearly structured book presents the much needed information in a compact and concise way. The renowned editor has succeeded in gathering together excellent authors to cover synthesis, applications, and the biological aspects in equal depth. Divided roughly equally between aziridines and epoxides, the twelve chapters discuss: * Synthesis of aziridines * Nucleophilic ring-opening of aziridines and epoxides * Organic synthesis with aziridine building blocks * Vinyl aziridines in organic synthesis * Diastereoselective aziridination reagents * Synthetic aspects of aziridinomitocene chemistry * Biosynthesis of biologically important aziridines * Organic catalysis of epoxide and aziridine ring formation * Metal-mediated synthesis of epoxides * Asymmetric epoxide ring opening chemistry * Epoxides in complex molecule synthesis * Biological activity of epoxide-containing molecules A high-quality reference manual for academic and industrial chemists alike.
Download or read book Organic Reaction Mechanisms 2015 written by A. C. Knipe and published by John Wiley & Sons. This book was released on 2019-02-08 with total page 720 pages. Available in PDF, EPUB and Kindle. Book excerpt: Organic Reaction Mechanisms 2015, the 51st annual volume in this highly successful and unique series, surveys research on organic reaction mechanisms described in the available literature dated 2015. The following classes of organic reaction mechanisms are comprehensively reviewed: Reaction of Aldehydes and Ketones and their Derivatives Reactions of Carboxylic, Phosphoric, and Sulfonic Acids and their Derivatives Oxidation and Reduction Carbenes and Nitrenes Nucleophilic Aromatic Substitution Electrophilic Aromatic Substitution Carbocations Nucleophilic Aliphatic Substitution Carbanions and Electrophilic Aliphatic Substitution Elimination Reactions Polar Addition Reactions Cycloaddition Reactions Molecular Rearrangements An experienced team of authors compile these reviews every year, so that the reader can rely on a continuing quality of selection and presentation.
Download or read book Modern Physical Organic Chemistry written by Eric V. Anslyn and published by University Science Books. This book was released on 2006 with total page 1148 pages. Available in PDF, EPUB and Kindle. Book excerpt: In additionto covering thoroughly the core areas of physical organic chemistry -structure and mechanism - this book will escortthe practitioner of organic chemistry into a field that has been thoroughlyupdated.
Download or read book Multiple Bonds between Metal Atoms written by F. Albert Cotton and published by Springer Science & Business Media. This book was released on 2005-06-28 with total page 856 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides historical perspective as well as current data Abundantly illustrated with figures redrawn from literature data Covers all pertinent theory and physical chemistry Catalytic and chemotherapeutic applications are included
Download or read book Inorganic Syntheses written by and published by John Wiley & Sons. This book was released on 2009-09-22 with total page 453 pages. Available in PDF, EPUB and Kindle. Book excerpt: The volumes in this continuing series provide a compilation of current techniques and ideas in inorganic synthetic chemistry. Includes inorganic polymer syntheses and preparation of important inorganic solids, syntheses used in the development of pharmacologically active inorganic compounds, small-molecule coordination complexes, and related compounds. Also contains valuable information on transition organometallic compounds including species with metal-metal cluster molecules. All syntheses presented here have been tested.
