Sökning: "heterogeneous catalysis"

Visar resultat 16 - 20 av 118 avhandlingar innehållade orden heterogeneous catalysis.

  1. 16. Development of Catalytic Enantioselective Approaches for the Synthesis of Carbocycles and Heterocycles

    Författare :Luca Deiana; Armando Córdova; Andrei Malkov; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Organocatalysis; Asymmetric Catalysis; Heterogeneous Catalysis; Aziridines; Pyrazolidines; Cyclopentanes; organisk kemi; Organic Chemistry;

    Sammanfattning : In biological systems, most of the active organic molecules are chiral. Some of the main constituents of living organisms are amino acids and sugars. They exist predominantly in only one enantiomerically pure form. LÄS MER

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

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

    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

  4. 18. Novel strategies for C-C/X bond formation

    Författare :Prasad Anaspure; Ian A. Nicholls; Suppan Kathiravan; Jesper G. Wiklander; Subramanian Suriyanarayanan; Yannick Landais; Linnéuniversitetet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; annulation; C-H activation; heterocycles; heterogeneous catalysis; homogeneous catalysis; lab-on-a-chip; Suzuki cross-coupling; Organic Chemistry; Organisk kemi;

    Sammanfattning : The formation of C-C/X bonds is essential for the manufacture of a broad range of chemicals and materials used in areas critical for maintaining quality of life in modern society, e.g. pharmaceuticals, agrochemicals and polymers, and for aspects of research in organic chemistry. LÄS MER

  5. 19. On the Chemical Romance Between Gas and Surface, and how to Illuminate it

    Författare :Sebastian Pfaff; Förbränningsfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; planar laser-induced fluorescence; surface optical reflectance; model catalysis; palladium; polycrystal; CO oxidation; heterogeneous catalysis; Fysicumarkivet A:2022:Pfaff;

    Sammanfattning : An increasing number of catalysis experiments are conducted at higher pressures to bridge the pressure gap. This means that we need to measure not only the sample surface but also the gas phase around the sample with spatial resolution. LÄS MER

  7. 20. Palladium Catalysis in Directed C-H Bond Activation and Cycloisomerisation Reactions

    Författare :Michael Oschmann; Jan-Erling Bäckvall; Oscar Verho; Jose Luis Mascareñas; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Palladium II ; Catalysis; C-H Functionalisation; Transamidation; XAS; organisk kemi; Organic Chemistry;

    Sammanfattning : The main focus of this thesis concerns the development of Pd(II)-catalysed synthetic methodologies for the preparation of biologically active compounds.In the first part (paper I-III), unactivated C–H bonds of a cyclobutane derivative are selectively functionalised using a directing group starting from the feedstock compound verbenone (paper I). LÄS MER