Sökning: "Aryl Ethers"

Visar resultat 1 - 5 av 17 avhandlingar innehållade orden Aryl Ethers.

  1. 1. 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. 2. Heck Reactions with Aryl Chlorides : Studies of Regio- and Stereoselectivity

    Författare :Gopal K. Datta; Mats Larhed; Anders Hallberg; Martin Oestreich; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Heck reaction; aryl chloride; vinyl ether; regioselective; stereoselective; palladium; chelation control; microwave; Pharmaceutical chemistry; Farmaceutisk kemi;

    Sammanfattning : Homogeneous palladium-catalyzed Heck vinylation of aryl chlorides was investigated under air using Herrmann’s palladacycle and the P(t-Bu)3-liberating salt [(t-Bu)3PH]BF4. Based on the results, controlled microwave heating was utilized to accelerate model Heck reactions with aryl chlorides down to 30 min employing an electron-poor olefin and a mixture of an ionic liquid and 1,4-dioxane as solvent. LÄS MER

  4. 3. Hypervalent Iodine Reagents in Metal-Free Arylations and Vinylations : Investigation of Suitable Coupling Partners and Synthesis of New Reagents

    Författare :Elin Stridfeldt; Berit Olofsson; Zoltán Novák; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Diaryliodonium Salts; Benzofurans; Aryl Ethers; Secondary Amides; Vinylbenziodoxolones; organisk kemi; Organic Chemistry;

    Sammanfattning : This thesis concerns the development of metal-free reactions to obtain carbon-heteroatom and carbon-carbon bonds. This is achieved by transferring carbon ligands from hypervalent iodine reagents to suitable nucleophiles. LÄS MER

  5. 4. The distribution of threo and erythroforms of arylglycerol-β-aryl ethers in lignins

    Författare :Sverker von Unge; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; birch lignin; ; spectroscopy; lignin chemistry;

    Sammanfattning : .... LÄS MER

  7. 5. Metal-Free O- and C-Arylation with Diaryliodonium Salts

    Författare :Erik Lindstedt; Berit Olofsson; Kilian Muñiz; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Hypervalent Iodine; Alkyl Aryl Ethers; Nitro Compounds; Alcohols; Diaryliodonium Salts; organisk kemi; Organic Chemistry;

    Sammanfattning : This thesis concerns the development of metal-free applications using diaryliodonium salts. The first project describes an arylation protocol of allylic and benzylic alcohols in aqueous media. The method proceeds under mild conditions and the ether products were obtained in moderate to good yields. LÄS MER