Sökning: "Andersson Pher G."

Visar resultat 1 - 5 av 14 avhandlingar innehållade orden Andersson Pher G..

  1. 1. Iridium Catalysed Asymmetric Hydrogenation of Pyridines

    Författare :Alban Cadu; Pher G. Andersson; Hans Adolfsson; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; hydrogenation; pyridine; catalytic; Iridium; Organisk kemi; Organic Chemistry;

    Sammanfattning : This thesis presents the hydrogenation of substituted pyridines using N,P-ligated iridium catalystsin homogeneous media. These iridium catalysts were developed within this research group in thepast decade. This method of hydrogenation is highly stereoselective, and in several cases good to excellent ees were obtained. LÄS MER

  3. 2. Asymmetric Hydrogenations of Imines, Vinyl Fluorides, Enol Phosphinates and Other Alkenes Using N,P-Ligated Iridium Complexes

    Författare :Jarle Sidney Diesen; Pher G. Andersson; Kálmán J. Szabó; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Organic chemistry; Catalysis; Asymmetric; Hydrogenations; Reductions; Alkenes; Imines; Vinyl fluorides; Enolphosphinates; Transition metal; Complexes; Iridium; Organisk kemi; Chemistry; Kemi;

    Sammanfattning : The research described in this thesis is directed toward the efficient, enantioselective synthesis of chiral products that have useful functionality. This goal was pursued through catalytic asymmetric hydrogenation, a reaction class that selectively introduces one or two stereocenters into a molecule in an atom-efficient step. LÄS MER

  4. 3. Chemo- and Enantioselective Hydrogenations : The Struggle of Expanding the Substrate Scope of Iridium Catalyzed Asymmetric Hydrogenations of Olefins

    Författare :Mattias Engman; Pher G. Andersson; Lise-Lotte Gundersen; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Organic chemistry; Organisk kemi; Organisk kemi; Organic Chemistry;

    Sammanfattning : The asymmetric hydrogenation of olefins is a facile and popular method of reaching chiral products. Whereas ruthenium- and rhodium-catalyzed asymmetric hydrogenations have a long history, the use of iridium in this area is new but fast-growing. LÄS MER

  5. 4. Development of New Chiral Bicyclic Ligands : Applications in Catalytic Asymmetric Transfer Hydrogenation, Epoxidations, and Epoxide Rearrangements

    Författare :Arnaud Gayet; Andersson Pher G.; Hilmersson Göran; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Organic chemistry; asymmetric catalysis; transfer hydrogenation; epoxide rearrangement; Organocatalysed epoxidation; chiral ligand; allylic alcohol; kinetic resolution; lithium amide; Organisk kemi; Organic chemistry; Organisk kemi;

    Sammanfattning : This thesis describes the synthesis and application of new chiral bicyclic ligands and their application in asymmetric catalysis. The studies involved: [i] The development of novel chiral bicyclic amino sulfur ligands and their use in transfer hydrogenation. LÄS MER

  7. 5. Design, Synthesis, Mechanistic Rationalization and Application of Asymmetric Transition-Metal Catalysts

    Författare :Christian Hedberg; Pher G. Andersson; Hans-Ulrich Blaser; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Organic chemistry; asymmetric catalysis; homogeneous hydrogenation; iridium; ruthenium; ligand design; mechanistic studies; kinetics; tolterodine; Organisk kemi; Organic chemistry; Organisk kemi;

    Sammanfattning : This thesis describes mechanistic studies, rational ligand design, and synthesis of asymmetric transition metal catalysts. The topics addressed concerned [Papers I-VII]:[I] The asymmetric addition of diethyl zinc to N-(diphenylphosphinoyl)benzalimine catalyzed by bicyclic 2-azanorbornyl-3-methanols was studied. LÄS MER