Direct, Catalytic, Intermolecular Anti-Markovnikov Hydroacetoxylations of Alkenes Enabled via Photoredox Catalysis, and Investigations into the Mechanism of the Polymerization of 4-Methoxystyrene Initiated by Pyrylium Salts Public Deposited

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  • March 19, 2019
Creator
  • Perkowski, Andrew
    • Affiliation: College of Arts and Sciences, Department of Chemistry
Abstract
  • I. Intermolecular Anti-Markovnikov Addition of Oxygen Nucleophiles to Alkenes: Direct and Indirect Catalytic Methods to Address a Fundamental Challenge Markovnikov versus anti-Markovnikov functionalization of alkenes is discussed, as well as the inherent challenge in overcoming Markovnikov selectivity. Stoichiometric and catalytic methods for anti-Markovnikov functionalization are discussed and appraised. II. Anti-Markovnikov Addition of Oxygen Nucleophiles to Alkene Cation Radical Intermediates The formation of alkene cation radicals is disccused, as well as examples of anti-Markovnikov nucleophilic addition to alkene cation radicals. III. The Direct Anti-Markovnikov Addition of Carboxylic Acids to Alkenes Using Photoredox Catalysis The conception and optimization of a photoredox catalysis system for the anti-Markovnikov addition of carboxylic acids to alkenes under visible light irradiation is described. IV. Investigations Into the Mechanism of the Polymerization of 4-Methoxystyrene Initiated by Pyrylium Salts Under Visible Light Irradiation Polymerization of 4-methoxystyrene using 2,4,6-tri(p-tolyl)pyrylium tetrafluoroborate as a photoinitiator is found to proceed via a cationic propagation mode. The effects of alcohol additives on the polymerization are discussed, and a proposal for the mechanism of their influence is put forward. Experiments to further elucidate the initiation and polymerization mechanism are proposed.
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  • In Copyright
Advisor
  • Alexanian, Erik
  • Templeton, Joseph
  • Waters, Marcey
  • Nicewicz, David
  • Brookhart, Maurice
Degree
  • Doctor of Philosophy
Degree granting institution
  • University of North Carolina at Chapel Hill Graduate School
Graduation year
  • 2014
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  • Chapel Hill, NC
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  • This item is restricted from public view for 2 years after publication.
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