Sökning: "aromatic substitution reaction"

Visar resultat 11 - 15 av 26 avhandlingar innehållade orden aromatic substitution reaction.

1. 11. Theoretical Investigations of C–O Activation in Biomass

   Författare :Pemikar Srifa; Joseph Samec; Supa Hannongbua; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; DFT calculations; global minima hopping; reactive force field; lignin; palladium; nucleophilic substitution; organisk kemi; Organic Chemistry;

   Sammanfattning : This thesis focuses on using computational chemistry approaches to study how biobased molecules interact with both homo- and heterogeneous catalysts. The reaction mechanisms of such transformations have also been studied. LÄS MER

3. 12. Asymmetric transfer hydrogenation of aromatic ketones and azirines with NH-ligands

   Författare :Peter Roth; Krister Zetterberg; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Organic chemistry; Organisk kemi; Organic chemistry; Organisk kemi; organisk kemi; Organic Chemistry;

   Sammanfattning : The Ru(arene)[(1S, 3R, 4R)-3-(Hydroxymethyl)-2-azabicyclo[2.2.1]heptane catalyst was optimized as ligand in the asymmetric transfer hydrogenation of ketones and resulted in increased activity and enantioselectivity of the catalyst. LÄS MER

4. 13. Development of Mild Methods for Selective Covalent Functionalization of Graphene

   Författare :Anna Lundstedt; Grennberg Helena; Bo Wegge Laursen; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Polycyclic aromatic hydrocarbons; graphene models; graphite; local ionization energy surfaces; graphene functionalization; Chemistry with specialization in Organic Chemistry; Kemi med inriktning mot organisk kemi;

   Sammanfattning : This thesis discusses methods for the comparatively mild covalent functionalization of graphene. Several graphene models were investigated: polycyclic aromatic hydrocarbons (PAHs), chemical vapor deposition (CVD)-graphene on SiO2/Si substrate, graphite foil, graphite flakes, kish graphite and highly oriented pyrolytic graphite. LÄS MER

5. 14. Organic reactions in self-organized surfactant systems

   Författare :Fredrik Currie; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; organic synthesis; kinetics; micelle; regioselectivity; microemulsion;

   Sammanfattning : The aim of this work has been to investigate how microemulsions and micellar systems can be used as reaction media to overcome reactant incompatibility, enhance reaction rates and especially to control product composition, i.e., introducing regioselectivity, in organic synthesis. LÄS MER

7. 15. Photoredox Catalysis Driven by Visible Light and Iron N-Heterocyclic Carbene Complexes

   Författare :Lisa de Groot; Centrum för analys och syntes; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; photoredox catalysis; iron N-heterocyclic carbene complexes; Fe-NHC; Visible light; ATRA; BHAS;

   Sammanfattning : Photoredox catalysis is a rapidly expanding field, in which organic transformations are catalysed using light. The most commonly used photoredox catalysts (PCs) are transition metal complexes which absorb in the visible region of the electromagnetic spectrum. LÄS MER