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Showing 1 to 20 of 39 for “"radical addition"”.

  1. Synthesis and Characterization of Ruthenium (II) Complexes and their Applications to Atom Transfer Radical Addition Reactions

    Nair, Radhika P.2009

    … complexes as catalysts for the atom transfer radical addition (ATRA) of various chloro-substrates (CCl4, CHCl3, p-TsCl, CCl3CO2Et, and CH2ClCO2Et) to styrene in the presence of AIBN as a radical source. For comparison purposes, we also investi<ated the activity of Cp#Ru(PPh3)2Cl and …

    unr Repository record

  2. Darstellung von Telechelen auf Acrylat- und Methacrylatbasis durch 'atom transfer radical polymerisation' und 'atom transfer radical addition'

    Pilgram, PeterPublikationsserver der RWTH Aachen University2002

    … and methacrylic monomers using atom transfer radical polymerisation and atom transfer radical addition. The telechelics can be used as prepolymers in polyaddition and polycondensation reactions. Polymerisation of MMA and MA with bifunctional initiators and different ligands as well as chain …

    aachen Repository record

  3. Some Reactions of Free Radicals and Grignard Reagents with Organosilicon Compounds

    Rowley, Roger J.Aston University1972

    … concerning the reactivity of allylsilanes in radical addition reactions. The reactions of allylsilanes with radical addition reagents have been reexamined and contrary to a previous report it has been found that both carbon tetrachloride and n-butyraldehyde add readily to allyitriethylsilane. …

    aston Repository record

  4. Decarboxylative Strategies in Cobalt and Metallaphotoredox Catalysis: Approaches to Aroylation, Allylation, and Strain-Driven Reactivity

    Diaz Hernandez, RafaelUniversity of Kansas2025

    … The first is a direct decarboxylative Giese radical addition to β,β-disubstituted Michael acceptors, a reaction largely unexplored since its initial reports in the 1980s. By leveraging the four-membered ring strain release, this transformation is now feasible. The second involves the use of …

    ku Repository record

  5. Synthesis of novel heterocyclic α-amino acids

    Berthelot, DidierThe Open University2001

    … and purines underwent stereoselective conjugate radical addition with an optically active oxazolidinone acceptor derived from (R)-S-methylcysteine to give syn-adducts. Hydrolysis of the oxazolidinone adducts followed by deprotection afforded the desired amino acids carrying pyrimidine- (thymine, …

    the-open-u Repository record

  6. Development of copper-catalyzed enantioselective alkene difunctionalization reactions via radical intermediates

    Zhu, Rong, Ph. D. Massachusetts Institute of TechnologyMassachusetts Institute of Technology2015

    … are consistent with a metal-catalyzed redox radical addition mechanism, in which a C-0 bond is formed via the copper-mediated enantioselective trapping of a prochiral alkyl radical intermediate derived from the initial trifluoromethyl radical addition. Chapter 3 A general and versatile method …

    mit Repository record

  7. The Exploration of a Strategy for Regioselective Arene Amination Utilising Non-Covalent Interactions

    Gillespie, JamesUniversity of Cambridge2022

    … methods which utilise reactive N-centred radicals for the synthesis of anilines from arenes have recently been developed. However, regiochemical control is a major challenge associated with these methods, with mixtures of regioisomers commonly obtained in most protocols. Non-covalent …

    cambridge Repository record

  8. Studies on the synthesis, cyclodextrin inclusion and biological activity of ajoene analogues as potentially novel anti-cancer agents

    Qwebani, TozamaDepartment of Chemistry2009

    … synthetic methodology. The synthesis involved a radical addition and a chemoselective oxidation as key steps. Characterisation was carried out by [1]H NMR, [13]C NMR, IR and HRMS spectroscopies.

    cape-town Repository record

  9. Radical based molecular design of discrete and stereoregulated oligomers via photomediated RAFT single unit monomer insertion (photo-RAFT SUMI)

    Huang, ZixuanUNSW, Sydney2021

    … growth, leaving a gap in terms of any radical addition methods utilizing the most diverse olefins as monomers. This thesis aims to address this gap, by synthesizing discrete and stereoregulated peptide mimics through successive and iterative radical addition of olefin monomers. With …

    unsw Repository record

  10. Radical Approaches to Alangium and Mitragyna Alkaloids

    Palframan, M JUniversity of York2010

    … (c). The approaches include the use of a key radical cyclisation to form the tri-cyclic core. Chapter 1 gives a general overview of radical chemistry and it focuses on the application of radical intermolecular and intramolecular reactions in synthesis. Consideration is given to the mediator of …

    whiterose Repository record

  11. Experiment, thermodynamic properties and modeling on combustion of methyl tert-butyl ether : isobutane and isobutene and thermodynamic properties of chloro alkanes and alkenes

    Chen, Chiung-Ju

    … ether (MTBE) unimolecular decomposition, MTBE radicals + O_2, tert-butyl radical +O_2, isobutene + HOO. (HO_2),isobutene + OH, sobutene-OH adducts + O_2, and allylic isobutenyl radical + O_2, are important systems in the understanding the oxidation chemistry of MTBE, tertiary butyl radical …

    njit Repository record

  12. The Chemical and Mechanical Properties of Thiol Modified ABS

    Ghaemy, MosaAston University1980

    … mixing operation through the thiol group by free radical addition to the double bond. The bound stabilisers produced in concentrated form (masterbatches) have been diluted to normal concentration (1%) with unstabilised ABS and their stabilising properties followed by the above techniques. The …

    aston Repository record

  13. METAL-FREE SELECTIVE SP3 C-H IMINATION AND COVALENT POSTSYNTHETIC MODIFICATION OF POLYSTYRENE BY DIRECT C-H AMINATION

    Hu, MengnanUniversity of Houston2023

    … involves a unique hydrogen-atom transfer/radical addition mechanism, which differs from the more established Hoffman-Löffler-Freytag amination. From there, we have successfully transferred this method from small molecules to macromolecules, as the amino functional group is attractive for …

    houston Repository record

  14. The Stabilization of Acrylonitrile-Butadiene-Styrene Copolymers Against Heat and Light

    Fernando, Walimuni Sunil EltonAston University1977

    … bound to ABS through the thiol group by free radical addition to the double bond. The antioxidant 3,5 ditert-butyl-4-hydroxy benzylmercaptan was found to inhibit adduct formation in the presence of residual monomer (styrene) remaining from the polymer manufacture. This has been overcome by (a) …

    aston Repository record

  15. The photoredox-catalysed generation and reaction of alkyl α-amino radicals for α-tertiary amine synthesis

    Harris, GeorgiaUniversity of Cambridge2023

    … photo-reductively generated alkyl α-amino radicals as intermediates. The first project describes the development of a multicomponent method for the photoredox-mediated synthesis of α-trialkyl α-tertiary amines (ATAs). This highly hindered scaffold is generated from primary amine, alkyl …

    cambridge Repository record

  16. Radical additions of hydrocarbons, ethers and acetals to alkenes via allyl transfer reaction: A new chain reaction for C-H bond functionalization

    Patil, Shradha VasantVirginia Tech2013

    Functionalization of hydrocarbons via a free-radical based allyl transfer reaction using various allyl bromide substrates has been previously studied. The work described in this dissertation focuses on the replacement of Br by phthalimido-N-oxyl (PINO ) which helps make this chemistry …

    vt Repository record

  17. Developing green processes for the conversion of biobased materials into pyrones

    Bradley, William2019

    … a nucleophilic heterocycle undergoing conjugate addition with brominated TAL producing a corrosion inhibitor. Successful corrosion inhibitors were synthesized in moderate to good yields. The highest corrosion inhibitor efficiency was 88% for newly developed corrosion inhibitors.</p> <p>In the …

    iastate Repository record

  18. Studies on the biosynthesis of the stephacidins and notoamides. Total synthesis of notoamide S and notoamide T. and Progress toward the synthesis of chrysogenamide A

    McAfoos, Timothy Jospeh, author, Williams, Robert M., advisor, Kennan, Alan J., committee member, Wood, John L., committee member, Finke, Richard G., committee member, Crick, Dean C., committee memberColorado State University. Libraries2011

    … of notoamide T is accomplished through a radical addition to the pyran ring of stephacidin A followed by an elimination ring opening event to provide the 6-hydroxy-7-prenyl indole. Chrysogenamide A is the newest member of the marcfortine family of natural products. Herein I discuss the …

    colostate Repository record

  19. Towards a library of functional block copolymers : synthesis and colloidal properties

    Justynska, JustynaUniversität Potsdam

    … approach towards functional block copolymers. Radical addition of functional mercaptanes was employed for the introduction of diverse functional groups to polybutadiene-containing block copolymers. Various modifications of 1,2-polybutadiene-poly(ethylene oxide) block copolymer precursors are …

    potsdam-diss Repository record

  20. Aqueous reactions of ozone with primary aromatic amines

    Chan, Wayne FaiUniversity of Illinois at Urbana-Champaign2011

    … NPACs mainly, but not exclusively, involve free radicals initiated by hydroxyl radical. Addition of mannitol, a $\cdot$OH scavenger, in most cases, significantly reduced NPACs formation. The actual reduction in the yield of azobenzene by the addition of mannitol was close to the values predicted …

    uiuc Repository record

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