Sökning: "Hypervalent iodine"

Visar resultat 16 - 19 av 19 avhandlingar innehållade orden Hypervalent iodine.

  1. 16. Synthesis of Aryl Ethers : Metal-Free Arylation of Alcohols using Diaryliodonium Salts

    Författare :Erik Lindstedt; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : This thesis contains two parts showing different metal-free methods to synthesize aryl ethers using hypervalent iodine reagents, more specifically diaryliodonium salts. The first part describes arylation of benzylic and allylic alcohols and phenols in water using the easily accessible base sodium hydroxide. LÄS MER

  3. 17. Metal‐Free Arylations of Oxygen and Nitrogen Nucleophiles : Applications of Diaryliodonium Salts

    Författare :Elin Stridfeldt; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; arylation; aryloxyamines; cyclization; diaryliodonium salts; O-aryloximes; sigmatropic rearrangement;

    Sammanfattning : This thesis concerns development of new methods for metal‐free arylations in organic synthesis. The protocols discussed in the thesis are based on a class of hypervalent iodine compounds called diaryliodonium salts. These reagents are known to transfer aryl moieties to suitable nucleophiles. LÄS MER

  4. 18. Catalytic Methods to Convert Allylic Substrates through Hydride and Proton Shifts : Transition Metal-Catalyzed and Organocatalyzed Approaches

    Författare :Samuel Martinez-Erro; Belén Martín-Matute; Franziska Schoenebeck; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Allylic substrates; Iridium catalysis; Base catalysis; Method development; Isomerization; Hydride shift; Proton shift; Mechanistic studies; organisk kemi; Organic Chemistry;

    Sammanfattning : The present thesis describes the development of new catalytic protocols to transform allylic substrates into a wide variety of versatile carbonyl and vinyl organic compounds. All procedures that are described in this work have in common the existence of one or more hydrogen shifts as key steps in the mechanism of the reactions. LÄS MER

  5. 19. Photoredox catalysis harnessing oxygen-centered radicals

    Författare :Alica Ondrejkova; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; oxygen-centered radical; photoredox catalysis; C-H functionalization; visible light;

    Sammanfattning : Visible light provides an abundant and renewable source of energy with an ample capacity to mediate chemical transformations. Photoredox catalysis utilizes this energy for the generation of high-energy radical intermediates and strategically employs these reactive species in versatile chemical transformations. LÄS MER