Sökning: "Borylation"

Visar resultat 1 - 5 av 11 avhandlingar innehållade ordet Borylation.

  1. 1. Palladium(II)-Catalyzed Oxidative Carbocyclization : Stereoselective Formation of C–C and C–B Bonds

    Författare :Tuo Jiang; Jan-Erling Bäckvall; Ross Widenhoefer; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Carbocyclization; Palladium catalysis; Oxidation; Enallenes; Enynes; Borylation; Arylation; Asymmetric Catalysis; Chiral Brønsted acids; Chiral anion; Organic Chemistry; organisk kemi;

    Sammanfattning : Transition metal catalysis has emerged as one of the most versatile methods for the selective formation of carbon–carbon and carbon–heteroatom bonds. In particular, oxidative carbon–carbon bond forming reactions have been widely studied due to their atom economic feature. LÄS MER

  2. 2. Advances in Stereoselective Palladium(ΙΙ)-Catalyzed Oxidative Transformations of Allenes

    Författare :Daniels Posevins; Jan-Erling Bäckvall; Troels Skrydstrup; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Synthesis; Palladium Catalysis; Allenes; Biomimetic; Carbocyclization; Borylation; Carbonylation; Oxidation; Heterogeneous; Organic Chemistry; organisk kemi;

    Sammanfattning : Palladium(ΙΙ)-catalyzed carbon-carbon and carbon-heteroatom bond formation via selective C-H bond oxidation constitutes a step-economical and versatile approach towards complex target molecules. This thesis has been focused on the development of new selective palladium(ΙΙ)-catalyzed transformations of allenes under oxidative conditions catalyzed by either homogenous or heterogeneous palladium(ΙΙ) catalysts. LÄS MER

  3. 3. Transition metal-catalyzed allylic and vinylic functionalization : Method development and mechanistic investigations

    Författare :Johanna M. Larsson; Kálmán J. Szabó; Dennis G. Hall; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; palladium; copper; catalysis; Heck reaction; C-H functionalization; allylic substitution; silylation; borylation; trifluoromethylation; fluorination; mechanistic study; transition metal; alkene; allylic silane; allylic boronate; allylic fluoride; Organic Chemistry; organisk kemi;

    Sammanfattning : The use of small molecule building blocks in, for example, pharmaceutical research and new material development, creates a need for new and improved organic synthesis methods. The use of transition metals as mediators and catalysts opens up new reaction pathways that have made the synthesis of completely new compounds possible as well as greatly improved the synthetic routes to known compounds. LÄS MER

  4. 4. Palladium(II)-Catalyzed Oxidative Cyclization Strategies : Selective Formation of New C-C and C-N Bonds

    Författare :Andreas K. Å. Persson; Jan-Erling Bäckvall; Matthew Sigman; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Carbocyclization; Palladium Catalysis; Oxidation; Cyclization; Enallenes; Aza-Enallenes; Dienallenes; Allenylation; Oxazolidinones; Biomimetic; Arylation; Borylation; Transmetallation; Organic Chemistry; organisk kemi;

    Sammanfattning : The main focus of this thesis has been directed towards preparation and oxidative carbocyclization of en-, dien- and aza-enallenes.In the first part of this thesis, a stereoselective oxidative carbocyclization of dienallenes was realized. LÄS MER

  5. 5. Synthesis of functionalized allylic, propargylic and allenylic compounds : Selective formation of C–B, C–C, C–CF3 and C-Si bonds

    Författare :Tony Zhao; Kálmán Szabó; Hajime Ito; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; palladium catalysis; allylboration; allenylboration; trifluoromethylation; silylation; copper catalysis; borylation; bimetallic catalysis; Organic Chemistry; organisk kemi;

    Sammanfattning : This thesis is focused on the development of new palladium and copper- mediated reactions for functionalization of alkenes and propargylic alcohol derivatives. The synthetic utility of the 1,2-diborylated butadienes synthesized in one of these processes has also been demonstrated. LÄS MER