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Showing 1 to 13 of 13 for “"Cyclopropane Ring"”.

  1. The Stereochemistry of Homolytic and Electrophilic Displacements on The Cyclopropane Ring

    Peterson, Alan HerbertUniversity of Illinois at Urbana-Champaign2014

    Made available in DSpace on 2014-12-05T19:37:25Z (GMT). No. of bitstreams: 1 6001675.pdf: 5258263 bytes, checksum: 84b95a1d6bd796b6db9a1f483cc0a542 (MD5) Previous issue date: 1960

    uiuc Repository record

  2. Stress relief: Exercising Lewis acid catalysis for donor-acceptor cyclopropane ring-opening annulations, a basis for new reaction methodologies

    Cavitt, Marchello AlfonzoGeorgia Institute of Technology2015

    … to assemble diverse polycycles, donor-acceptor cyclopropanes are useful, versatile synthetic equivalents for C-C bond formations. By taking advantage of the strain within these unique, polarized systems, differing molecular architectures can be accessed directly to perform contemporary organic …

    gatech Repository record

  3. The Chemistry of Cyclopropylarene Radical Cations

    Wang, YonghuiVirginia Tech1997

    Cyclopropane derivatives are frequently utilized as "probes" for radical cation intermediates in a number of important chemical and biochemical oxidation. The implicit assumption in such studies is that if a radical cation is produced, it will undergo ring opening. Through a detailed examination of …

    vt Repository record

  4. Application of Mn(III) Oxidative Cyclizations to Natural Product Synthesis

    Landschoot, BryanThe University of Western Ontario2014

    … containing heterocycles. Exploration of a cyclopropane ring opening reaction using indoline, and subsequent manganese(III) cyclization chemistry will be presented as a possible route towards a family of natural products called the flinderoles. Work on the construction of the core of several …

    uwo Repository record

  5. Structure and Biosynthesis of the Diterpene Hydrocarbon, Casbene

    Guilford, William JosephUniversity of Illinois at Urbana-Champaign1982

    … 14,15-double bond of GGOPP is retained in the cyclopropane ring of casbene.

    uiuc Repository record

  6. Studies of the Synthesis of Polycyclic Homocyclopropylcarbinols

    Last, Larry AlanUniversity of Illinois at Urbana-Champaign2014

    … intramolecular attack of the metallated cyclopropane ring onto the epoxide. A series of bromocyclopropyl epoxides was prepared from diene precursors in three or four steps by dibromocyclopropanation, epoxidation, and stereoselective reduction of one bromine atom. As an example, …

    uiuc Repository record

  7. The rearrangement of cyclopropyl carbenes

    Bird, Colin LeonardUniversity of Southampton1969

    … - 140° in an alkaline aprotic medium.<br/><br/>Cyclopropane carboxaldehyde p-toluene sulphonyl hydrazone itself gives rise mainly to cyclobutene. The direction of ring opening has been determined from a study of asymmetrically substituted cyclopropyl carbenes, The substitution pattern in the …

    soton Repository record

  8. The synthesis and structural examination of 3alpha, 5-cyclo-5alpha-androstane steroids.

    Gibb, Bruce ClarkRobert Gordon University1992

    … is outlined and the chemistry of the cyclopropane ring discussed. A critical evaluation of the synthesis of cyclopropane steroids and the alkylation of steroids has been made. The objectives and methodologies behind recent innovations are discussed. An improved synthesis of the lead …

    rgu Repository record

  9. Reactions and rearrangements of chroman-4-ones and related compounds

    Gabbutt, Christopher DavidLancashire Polytechnic1987

    … anti-Markovnikov addition of acetic acid to the cyclopropane ring are also formed. Carbanions derived from chromanones have been generated and used to prepare a range of 3-hydroxymethylenechroman-4-ones. Conjugate reduction of the corresponding chromone by sodium borohydride in pyridine provides …

    cent-lancashire Repository record

  10. Radical anion rearrangements. aryl cyclopropyl ketyl anions

    Drumright, Ray E.Virginia Tech1991

    … cyclopropyl ketone (28a), 1-benzoyl-2-methylcyclopropane (28b), 1-benzoyl-2,2-dimethylcyclopropane (28c), p-tolyl cyclopropyl ketone (28d), and 1-benzoyl-1-methylcyclopropane (28e), undergo a slow and reversible cyclopropyl carbinyl type rearrangement followed by dimerization of the …

    vt Repository record

  11. Iridium-catalyzed borylation of aromatic and aliphatic C-H bonds: methodology and mechanism

    Liskey, CarlUniversity of Illinois at Urbana-Champaign2013

    … of the substrate. Finally, the borylation of cyclopropanes catalyzed by the combination of (η6-mes)IrBpin3 or [Ir(COD)OMe]2 and a phenanthroline derivative is reported in Chapter 6. The borylation occurs selectively at the methylene C-H bonds of the cyclopropane ring over methine or methyl C-H …

    uiuc Repository record

  12. A Comparative Study of the Reactions of Mesityl Cyclopropyl Ketone and Mesityl Propenyl Ketone

    Baumgartner, Frederick NeilUniversity of Illinois at Urbana-Champaign1948

    uiuc Repository record

  13. Development of New N-Cyclopropyl Based Electron Transfer Probes for Cytochrome P-450 and Monoamine Oxidase Catalyzed Reactions

    Grimm, Michelle L.Virginia Tech2011

    … is presented in Chapter 2. The barrier for ring opening of aminyl radical cations derived from N-cyclopropyl derivatives of tertiary amines (such as MPTP) is expected to be low. Reactions of 3BP with all three compounds are very similar. The results suggest that the reaction between …

    vt Repository record