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| Author | : Yat-Sing Fung |
| Publisher | : |
| Total Pages | : 320 |
| Release | : 2012 |
| Genre | : Hydrocarbons |
| ISBN | : |
| Author | : Michela Milan |
| Publisher | : |
| Total Pages | : 0 |
| Release | : 2018 |
| Genre | : |
| ISBN | : |
The oxidation of aliphatic C-H bonds is a very powerful reaction because it allows the functionalization of inert C-H bonds, converting them into a suitable sites for further chemical elaboration. It also represents one of the most challenging reactions in modern synthetic organic chemistry because the multitude of aliphatic C-H bonds in a molecule makes site selective oxidation particularly difficult. Moreover, the introduction of chirality represents an unmet but very appealing challenge, because the asymmetric oxidation of hydrocarbons produces chiral compounds of high value in organic synthesis from readily available starting materials. Until now, examples of enantioselective oxidation of nonactivated aliphatic C-H bonds remain exclusive to enzymes. This thesis has been devoted to the development of new catalytic systems capable to oxidize nonactivated aliphatic C-H bonds in a site-selective and enantioselective manner. In particularly, chemo- and enantioselective aliphatic C-H oxidation reactions, especially focused in amide containing substrates have been developed.
| Author | : Wenjun Lu |
| Publisher | : John Wiley & Sons |
| Total Pages | : 524 |
| Release | : 2017-02-03 |
| Genre | : Science |
| ISBN | : 1119092515 |
A combination of oxidation methods and C‒H bond functionalization, this book emphasizes mechanistic understanding and critical analysis of synthetic reactions to offer a guide or manual for practicing chemists. • Combines oxidation methods and C‒H bond functionalization, two of the most important aspects of organic synthesis • Deals with C‒H bonds, an area of dynamic and continuous research across chemistry and catalysis • Helps readers understand the fundamental and applied differences among various oxidation methods and reactions • Covers mechanistic details, conditions, oxidation reagents, and practical aspects of different reactions
| Author | : Ashley Margaret Adams |
| Publisher | : |
| Total Pages | : |
| Release | : 2015 |
| Genre | : |
| ISBN | : |
The selective hydroxylation of C--H bonds with complex substrates remains a grand challenge in modern synthetic chemistry. Selective methods for C--H oxidation have the potential to transform the field of natural product and complex molecule synthesis. While a variety of methods exist for the oxidation of C--H bonds, significant challenges in reaction efficiency, including catalyst turnover numbers and oxidant use, and positional selectivity still remain. One method that our laboratory has investigated for C--H hydroxylation uses 1,2,3-benzoxathiazine-2,2-dioxide-derived oxaziridines. By gaining an understanding of the off pathway processes that govern oxaziridine stability, significant improvements in reaction time, scope, and efficiency were obtained. Subsequent studies focused on elucidating the energetic requirements of the C--H bond oxidation event as well as probing the mechanism of the previously undescribed reduction of the oxaziridine intermediate in water and alcoholic solvents. The final chapter of this thesis details investigations into two metal-based approaches for catalyzing C--H hydroxylation, along with a comparative analysis of several methods for C--H hydroxylation that appear in the literature. These efforts serve to define the current scope and limitations of existing technologies for C--H hydroxylation and provide a reference for users of this technology.
| Author | : Piet W.N.M. van Leeuwen |
| Publisher | : John Wiley & Sons |
| Total Pages | : 708 |
| Release | : 2022-05-31 |
| Genre | : Technology & Engineering |
| ISBN | : 3527349022 |
Supramolecular Catalysis Provides a timely and detailed overview of the expanding field of supramolecular catalysis The subdiscpline of supramolecular catalysis has expanded in recent years, benefiting from the development of homogeneous catalysis and supramolecular chemistry. Supramolecular catalysis allows chemists to design custom-tailored metal and organic catalysts by devising non-covalent interactions between the various components of the reaction. Edited by two world-renowned researchers, Supramolecular Catalysis: New Directions and Developments summarizes the most significant developments in the dynamic, interdisciplinary field. Contributions from an international panel of more than forty experts address a broad range of topics covering both organic and metal catalysts, including emergent catalysis by self-replicating molecules, switchable catalysis using allosteric effects, supramolecular helical catalysts, and transition metal catalysis in confined spaces. This authoritative and up-to-date volume: Covers ligand-ligand interactions, assembled multi-component catalysts, ligand-substrate interactions, and supramolecular organocatalysis and non-classical interactions Presents recent work on supramolecular catalysis in water, supramolecular allosteric catalysis, and catalysis promoted by discrete cages, capsules, and other confined environments Highlights current research trends and discusses the future of supramolecular catalysis Includes full references and numerous figures, tables, and color illustrations Supramolecular Catalysis: New Directions and Developments is essential reading for catalytic chemists, complex chemists, biochemists, polymer chemists, spectroscopists, and chemists working with organometallics.
| Author | : G. Cainelli |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 272 |
| Release | : 2012-12-06 |
| Genre | : Science |
| ISBN | : 3642693628 |
Chromium oxidation, well known and widely explored in organic chemistry since the very beginning of this science, is a topic of current interest for the organic chemist as evidenced by the continuous development of new techni ques and procedures reported in the literature. Chromium oxidation is a simple process which can be easily performed in the laboratory and scaled up in industry as well. Although almost every oxidizable organic functional group may undergo chromium oxidation, the most important fields of appli cation are the oxidation of alcohols, allylic and benzylic oxidation, oxidative degradation and oxidation of some organometallic compounds. A high degree of selectivity is often possible by choosing the most suitable reagent among those several ones now available. This book takes account of the various functional groups that undergo oxidation and the entire literature up to 1982. It has been written in the hope to help the synthetic organic chemist in his experimental work. For this purpose a number of tables comprising yields and references have been included; detailed descriptions of typical procedures are meant to show the experimental conditions and the scope of the reactions. We wish to thank Dr. Mario Orena for his valuable scientific and technical assistence and Prof. Bruno Camerino, who read the entire manuscript and corrected many of the errors. Bologna, February 1984 Gianfranco Cainelli Giuliana Cardillo Table of Contents I. Introduction . . . . . . . . . . .
| Author | : Takeo Kawabata |
| Publisher | : Springer |
| Total Pages | : 237 |
| Release | : 2016-02-23 |
| Genre | : Science |
| ISBN | : 3319263331 |
The series Topics in Current Chemistry presents critical reviews of the present and future trends in modern chemical research. 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.Review articles for the individual volumes are invited by the volume editors.Readership: research chemists at universities or in industry, graduate students
| Author | : Piet W.N.M. van Leeuwen |
| Publisher | : John Wiley & Sons |
| Total Pages | : 708 |
| Release | : 2021-12-31 |
| Genre | : Technology & Engineering |
| ISBN | : 3527832041 |
Supramolecular Catalysis Provides a timely and detailed overview of the expanding field of supramolecular catalysis The subdiscpline of supramolecular catalysis has expanded in recent years, benefiting from the development of homogeneous catalysis and supramolecular chemistry. Supramolecular catalysis allows chemists to design custom-tailored metal and organic catalysts by devising non-covalent interactions between the various components of the reaction. Edited by two world-renowned researchers, Supramolecular Catalysis: New Directions and Developments summarizes the most significant developments in the dynamic, interdisciplinary field. Contributions from an international panel of more than forty experts address a broad range of topics covering both organic and metal catalysts, including emergent catalysis by self-replicating molecules, switchable catalysis using allosteric effects, supramolecular helical catalysts, and transition metal catalysis in confined spaces. This authoritative and up-to-date volume: Covers ligand-ligand interactions, assembled multi-component catalysts, ligand-substrate interactions, and supramolecular organocatalysis and non-classical interactions Presents recent work on supramolecular catalysis in water, supramolecular allosteric catalysis, and catalysis promoted by discrete cages, capsules, and other confined environments Highlights current research trends and discusses the future of supramolecular catalysis Includes full references and numerous figures, tables, and color illustrations Supramolecular Catalysis: New Directions and Developments is essential reading for catalytic chemists, complex chemists, biochemists, polymer chemists, spectroscopists, and chemists working with organometallics.
| Author | : Christian Hess |
| Publisher | : Royal Society of Chemistry |
| Total Pages | : 453 |
| Release | : 2011-07-22 |
| Genre | : Science |
| ISBN | : 1847559875 |
The book gives a comprehensive up-to-date summary of the existing information on the structural/electronic properties, chemistry and catalytic properties of vanadium and molybdenum containing catalysts. It discusses the importance of nanoscience for the controlled synthesis of catalysts with functional properties and introduces the necessary background regarding surface properties and preparation techniques, leading from a textbook level to the current state of knowledge. Then follows an extensive survey and analysis of the existing open and patent literature - an essential knowledge source for the development of the new generation of partial oxidation catalysts. Important examples from current research on partial oxidation reactions are reviewed from experts in the field. The next chapter discusses the importance of 2- and 3-dimensional model systems for a fundamental understanding of the structure of transition metal oxide catalysts and its correlation to reactivity. Finally, an outlook on research opportunities within the area of partial oxidation reactions is presented.
| Author | : A.E. Shilov |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 556 |
| Release | : 2001-11-30 |
| Genre | : Science |
| ISBN | : 9781402004209 |
hemistry is the science about breaking and forming of bonds between atoms. One of the most important processes for organic chemistry is breaking bonds C–H, as well as C–C in various compounds, and primarily, in hydrocarbons. Among hydrocarbons, saturated hydrocarbons, alkanes (methane, ethane, propane, hexane etc. ), are especially attractive as substrates for chemical transformations. This is because, on the one hand, alkanes are the main constituents of oil and natural gas, and consequently are the principal feedstocks for chemical industry. On the other hand, these substances are known to be the less reactive organic compounds. Saturated hydrocarbons may be called the “noble gases of organic chemistry” and, if so, the first representative of their family – methane – may be compared with extremely inert helium. As in all comparisons, this parallel between noble gases and alkanes is not fully accurate. Indeed the transformations of alkanes, including methane, have been known for a long time. These reactions involve the interaction with molecular oxygen from air (burning – the main source of energy!), as well as some mutual interconversions of saturated and unsaturated hydrocarbons. However, all these transformations occur at elevated temperatures (higher than 300–500 °C) and are usually characterized by a lack of selectivity. The conversion of alkanes into carbon dioxide and water during burning is an extremely valuable process – but not from a chemist viewpoint.
