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Showing 1 to 20 of 83 for “"Iodides"”.
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Manganese-catalyzed carbonylation of alkyl iodides
… the manganese-catalyzed carbonylation of alkyl iodides while using a variety of nucleophiles was developed. The method concerns the alkoxy and amino carbonylation as well as the use of more unconventional nucleophiles such as thiols, azide and hydride. The method employs alkyl iodides although …
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Adsorption of organic Iodides on Reduced Silver Functionalized Silica Aerogel
… In this presented work, the removal of organic iodides is studied particularly. Unlike that of inorganic iodine, the organic iodides were not well studied because of the low concentrations and the corresponding technical difficulties. Most of the studies on the organic iodides are …
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Electron Paramagnetic Resonance Studies of Hexakis (Urea) Metal (Iii) Iodides
Made available in DSpace on 2014-12-13T20:10:47Z (GMT). No. of bitstreams: 1 8009005.pdf: 3150908 bytes, checksum: 85700b84468e2b0a24cf173ebce9a157 (MD5) Previous issue date: 1979
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I. Synthesis of Ascarosides for Biological Evaluation and II. Development of Visible Light-Promoted Selenofunctionalization and Grafting of Aryl Iodides
… organic thin film using photocatalysis and aryl iodides. Most commonly, organic thin films are generated using thiol precursors. However, these thin films are often unstable to oxidation and thermal desorption. To circumvent these issues, a visible light photocatalytic method is developed where …
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Phosphine-promoted cross-coupling reactions of propargylcopper reagents and alkenyl iodides and the total synthesis of (-)-gloeosporone via nickel-catalyzed epoxide-alkyne reductive macrocyclization
… Reactions of Propargylcopper Alkenyl Iodides Reagents and Alkenyl Iodides. An electron-rich phosphine additive is critical and sufficient for propargyl-selective couplings of propargylcopper reagents and alkenyl iodides. This method is complementary to those previously described, in …
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Synthesis of Crowded Tolanes: Models for Molecular Recognition
… of both arylacetylenes and tolanes from aryl iodides. The Stille reaction is usually slow for electron rich aryl iodides (such as these aryl iodides that are substituted resorcinol derivatives). However, these crowded penta-substituted aryl iodides underwent the Stille coupling reactions …
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The Development of New Methods for the Introduction of a Vinyl Unit Using Silicon-Based Cross -Coupling Reactions
… react in the first coupling with aryl iodides and an electron-deficient alkenyl iodide under ""fluoride-free"" conditions. The second, fluoride-activated cross-coupling was explored."
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Transition metal-catalyzed cross-coupling reactions of functionalized organometallic reagents
… benzylic zinc bromides with functionalized alkyl iodides in the presence of TBAI · the application of alkyl bromides in a Csp3-Csp3 cross-coupling reaction. Furthermore, · the presence of sensitive functional groups such as an amino function with an unprotected NH group is tolerated · coupling of …
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Super electron donors powerful reductions performed by neutral organic molecules
… the reduction of unactivated aryl and alkyl iodides. My study investigates the scope of donor 1 as a reducing agent and extends the study to a more powerful donor 2. Chapter One provides an introduction to the world of electron transfer. After giving a theoretical background, synthetic …
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Estudio del comportamiento fotoquímico y electroquímico de yodoalquenos
… photo- and electrochemical behaviour of vinyl iodides. The objectives of this work are summarized in chapter 3 after a brief introduction (chapter 1) and an overview of previous work in photochemistry of C-X bond in vinyl halides. In chapter 4, the stereoselective synthesis and the reactivity …
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Ketone -Catalyzed Epoxidation of Alkenes With Oxone and Palladium -Catalyzed Biaryl Synthesis via Silacyclobutanes
… to undergo cross-coupling reactions with aryl iodides. The rate of reaction and extent of homocoupling were dramatically affected by the addition of ligands for the palladium catalyst. A wide range of electronically different and structurally diverse unsymmetrical biaryls have been prepared in …
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Synthesis and characterization of metal reagents mediating C-X activation (X=Cl, H) of hydrocarbons
… substrates used are alkanes, alcohols and alkyl iodides"--Abstract, page iii.
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Solid state and nuclear results from Mössbauer studies with I[superscript 129]
… obtained: a) The isomeric shifts for the alkali iodides were found to be linearly dependent on the number of 5p holes in the iodine ion. From this dependency, a calibration of the isomeric shift scale in terms . of the 5s-electron denSity was obtained. The sand p populations inferred from these …
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Zincative Functionalization of C–H Bonds Using Lithium Amide Zincate Bases
… arylation and vinylation with aryl iodides and vinyl iodides. In summary, lithium zincate bases have been demonstrated to be broadly useful for diverse and regioselective C–H functionalization to introduce valuable complexity from simple starting materials.</p>
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Modular Methods for the Synthesis of α-Tertiary and α-Branched Alkylamines via Visible-Light-Mediated Radical Generation
… alkyl primary amines, alkyl aldehydes and alkyl iodides in an advancement of the carbonyl alkylative amination chemistry previously reported by the Gaunt group. Carbon-carbon bond formation takes place upon addition of an alkyl radical to an alkyl imine. Over 50 new a-branched alkylamines are …
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Access to modified geiparvarins using Pd(0)-mediated C-C bond forming reactions
… reactions, using the appropriate intermediate iodides and bromides, is described. The application of Stille and Heck conditions to give 3″-ethenylgeiparvarin analogues and Sonogashira conditions to produce 3″-ethynylgeiparvarin analogues, using the relevant intermediate iodides, is also …
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Development and Applications of Pd Catalysts for C-N Cross-Coupling Reactions
… C-N cross-coupling reactions of aryl iodides is described. Neal is shown to have a significant inhibitory effect on these processes. By switching to a solvent system in which the iodide byproduct was insoluble, reactions of aryl iodides were accomplished with the same efficiencies as …
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DISORDER IN MATERIALS
… the structure around copper changed from four iodides to three iodides and a sulphur, as the cumotl cells became discharged. The polymer electrolyte PEO4Cal2 Ca K edge result showed calcium surrounded by a first co-ordination shell of 10 oxygen atoms with no contribution from the iodide. The …
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A study of the self-diffusion of certain of the lower alkyl halides
… and Et-, nPris-,isoPr-, nBu-, isoBu- and secBu-iodides and bromides were determined by application of the capillary tube method and using iodine-131 and bromine-82 for labelling the compounds. Viscosities were measured for those compounds for which the data in the literature were insufficient …
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