Sökning: "organocatalytic"

Visar resultat 1 - 5 av 15 avhandlingar innehållade ordet organocatalytic.

  1. 1. Organocatalytic Domino Reactions

    Författare :Henrik Sundén; Armando Córdova; Pavel Kočovský; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; organocatalytic; domino; iminium-enamine; enamine-iminium; Organic chemistry; Organisk kemi; Organic Chemistry; organisk kemi;

    Sammanfattning : Organocatalyzed reactions involving activation strategies of ketones and aldehydes are important processes in organic chemistry. These activation strategies serve as a versatile platform for the construction of several domino reactions. LÄS MER

  3. 2. Development of organocatalytic asymmetric transformations

    Författare :Ismail Ibrahem; Armando Cordova; Stephen Hanessian; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Asymmetric Catalysis; α-amino acids; Aldehydes; Ketones; α-Aminomethylation; Aziridination; Hydrophosphination; Diarylprolinol; Proline derivatives; Organic synthesis; Organisk syntes; Organic Chemistry; organisk kemi;

    Sammanfattning : The ability of amino acids and amino acid derivatives to mediate various organocatalytic asymmetric transformations has been investigated and applied in the development of various reactions. This work describes the development of a direct catalytic asymmetric α-aminomethylation of ketones and aldehydes, a catalytic asymmetric aziridination, hydrophosphination and amination of α,β-unsaturated aldehydes. LÄS MER

  4. 3. Quantum Chemical Studies of Enantioselective Organocatalytic Reactions

    Författare :Peter Hammar; Fahmi Himo; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; DFT; enantioselective; asymmetric; organocatalysis; Theoretical chemistry; Teoretisk kemi;

    Sammanfattning : Density Functional Theory is used in order to shed light on the reaction mechanisms and the origins of stereoselectivity in enantioselective organocatalytic reactions. The reactions investigated are the dipeptide-catalyzed aldol reaction, the cinchona thiourea-catalyzed nitroaldol reaction and the prolinol derivative-catalyzed hydrophosphination reaction. LÄS MER

  5. 4. Synthesis and Organocatalytic Evaluation of P-Chirogenic Phosphines

    Författare :Kristian Andersson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Organisk kemi; kiralitet; organokatalys; fosfiner;

    Sammanfattning : .... LÄS MER

  7. 5. Quantum Chemical Studies of Mechanisms and Stereoselectivities of Organocatalytic Reactions

    Författare :Peter Hammar; Hans Ågren; Fahmi Himo; Gregori Ujaque; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Theoretical chemistry; Teoretisk kemi; Organic chemistry; Organisk kemi;

    Sammanfattning : As the field of organocatalysis is growing, it is becoming more important to understand the specific modes of action of these new organic catalysts. Quantum chemistry, in particular density functional theory, has proven very powerful in exploring reaction mechanisms as well as selectivities in organocatalytic reactions, and is the tool used in this thesis. LÄS MER