Search for dissertations about: "asymmetric catalysis"

Showing result 6 - 10 of 91 swedish dissertations containing the words asymmetric catalysis.

  2. 6. Bispyridylamides as ligands in asymmetric catalysis

    Author : Oscar Belda de Lama; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; asymmetric catalysis; chiral ligand; pyridine; amide; allylic alkylation; enantioselective; cyanation; ring-opening; chiral Lewis acid;

    Abstract : This thesis deals with the preparation and use of chiralbispyridylamides as ligands in metal-catalyzed asymmetricreactions. The compounds were prepared by amide formation usingdifferent coupling reagents. READ MORE

  4. 7. Transition Metal Catalysis for Selective Synthesis and Sustainable Chemistry

    Author : J. Johan Verendel; Pher G. Andersson; Reko Leino; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Catalysis; Transition metals; Asymmetric catalysis; Hydrogenation; Sustainable chemistry; Kemi med inriktning mot organisk kemi; Chemistry with specialization in Organic Chemistry;

    Abstract : This thesis discusses the preparation and use of transition-metal catalysts for selective organic chemical reactions. Specifically, two different matters have been studied; the asymmetric hydrogenation of carbon-carbon double bonds using N,P-ligated iridium catalysts and the metal-catalyzed transfer of small molecules from biomass to synthetic intermediates. READ MORE

  5. 8. Asymmetric Synthesis and Mechanistic Insights of Transition-Metal-Catalyzed Hydrogenation

    Author : Jianping Yang; Pher G. Andersson; Clément Mazet; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Asymmetric hydrogenation; Iridium catalysis; Rhodium catalysis; Chiral organofluorine; Enantioconvergent catalysis; Arene hydrogenation; Organic Chemistry; organisk kemi;

    Abstract : The work presented in this thesis is focused on asymmetric synthesis and mechanistic insights of hydrogenations catalyzed by Ir-N,P- and Rh-diphosphine complexes. The developed methodologies provide an efficient catalytic system to access optically enriched compounds by exploiting the effect of the N,P ligand structure and investigating the enantioconvergent behavior. READ MORE

  6. 9. Allylic alcohols and aziridines from alkenes : Studies in asymmetric catalysis

    Author : Mikael J. Södergren; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Chemistry; Enantioselective; allylic alcohols; epoxide rearrangement; lithium amides; desymmetrization; kinetic resolution; allylic oxidation; alkenes; aziridination; Kemi; Chemistry; Kemi; organisk kemi; Organic Chemistry;

    Abstract : The development of methodology for asymmetric catalytic transformation of alkenederivatives is summarized. The studies concern the [a] Cu(I)-catalyzed allylic oxidation,[b] isomerization of epoxides to allyl alcohols, and [c] Cu(I)-catalyzed alkeneaziridination, respectively.[a] The preparation of exo-2-azabicyclo[2.2. READ MORE

  7. 10. Downsizing in asymmetric catalysis

    Author : Christina Jönsson; KTH; []
    Keywords : ;

    Abstract : .... READ MORE