Sökning: "C-H activation"

Visar resultat 11 - 15 av 30 avhandlingar innehållade orden C-H activation.

  1. 11. Multicomponent Catalytic Reactions : Theoretical and Experimental Studies

    Författare :Martin Pauze; Enrique Gomez Bengoa; Belen Martin-Matute; Vincent Gandon; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; C-H Activation; Quaternary Quinolinium; Organocatalyst; Transition Metal Catalyst; Umpolung Strategy; Multi-step Reactions; Mechanistic Investigation; Density Functional Theory; organisk kemi; Organic Chemistry;

    Sammanfattning : In this thesis, Density Functional Theory (DFT) methods have been applied to study the mechanisms of three different multicomponent organic reactions. Also, a new synthetic procedure for the preparation of quinolinium salts is presented, and its mechanism also studied by DFT calculations. LÄS MER

  3. 12. Catalysis in Dynamic Systems: Control within Molecular Reaction Networks

    Författare :Fredrik Schaufelberger; Olof Ramström; Leonard Prins; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; systems chemistry; dynamic covalent chemistry; catalyst screening; reaction networks; organocatalysis; imine exchange; combinatorial chemistry; dynamic systemic resolution; feedback; error-correction; Morita-Baylis-Hillman reaction; C-H activation; H-bond catalysis; transamination; Kemi; Chemistry;

    Sammanfattning : Life as we know it is based on complex networks of biochemical reactions that constantly interact within large dynamic systems. The field of systems chemistry uses chemical models to study how reaction networks – and thereby life – function on a molecular level. LÄS MER

  4. 13. Metals in Dynamic Chemistry: Selection & Catalysis

    Författare :Brian J.J. Timmer; Olof Ramström; Stéphane Bellemin-Laponnaz; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; constitutional dynamic chemistry; selection; multivalent interactions; carbohydrates; quartz crystal microbalance; catalyst screening; aqueous olefin metathesis; C-H activation; Kemi; Chemistry;

    Sammanfattning : In the adaptation to the oxidative environment on earth, metals played a crucial role for the evolution of life. The presence of metals also allowed access to advanced functions due to their unique coordination sphere and reactivity. LÄS MER

  5. 14. Development of New Efficient Iridium-Catalyzed Methods for the Construction of Carbon-Heteroatom Bonds

    Författare :Elis Erbing; Belén Martín-Matute; Keary Engle; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Iridium Catalysis; Method development; Halogenation; Isomerization; C-H Activation; organisk kemi; Organic Chemistry;

    Sammanfattning : Today’s society has a large demand for biologically active chemicals that can be used for example as pharmaceuticals and in the agriculture. These are normally constructed by assembling together several smaller chemical molecules. LÄS MER

  7. 15. New Arylation Strategies Based on Organomain Group Reactivity

    Författare :Carina Sollert; Lukasz T. Pilarski; Brenton L. DeBoef; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; C-H functionalisation; catalysis; ruthenium; indole; silylation; boronate; boryl aryne; aryne distortion; Chemistry with specialization in Organic Chemistry; Kemi med inriktning mot organisk kemi;

    Sammanfattning : The work in this thesis describes the development of new heteroarylation methodology based on transition metal-catalysed C-H functionalisation and the properties of organomain group compounds. The underlying reaction mechanisms and reactivity patterns of the (hetero)arene substrates are also investigated. LÄS MER