Sökning: "N-alkylation"

Visar resultat 1 - 5 av 9 avhandlingar innehållade ordet N-alkylation.

1. 1. Iridium Catalyzed Carbon- Heteroatom Bond Forming Reactions via Hydrogen Transfer : Method Development and Mechanistic Elucidations

   Författare :Aitor Bermejo López; Belén Martín‐Matute; Eduardo Peris; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Catalysis; N-Heterocyclic carbene; N-Alkylation; Hydrogen transfer; Amino acids; Carbohydrates; Amines; Organic Chemistry; organisk kemi;

   Sammanfattning : The present thesis describes the applicability of two different iridium(III) complexes for C-O and C-N bond forming reactions. The different projects described in this work are united by the use of an iridium catalyst bearing a functionalized N-heterocyclic carbene ligand. LÄS MER

3. 2. Valorization of biomass related substrates into value added chemicals : Hydrogen transfer catalysis

   Författare :Nitish Kumar Garg; Centrum för analys och syntes; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biomass; levulinic acid; hydrosilylation; borrowing-hydrogen; N-alkylation;

   Sammanfattning : In the current global scenario, it is evident that global warming and climate change are primarily driven by emissions stemming from the utilization of fossil fuels. Yet, if we look around, most of what we see is made from or linked to fossil fuels and it clearly shows our over-dependency on fossil fuels and hence there is a significant need to develop alternate sources of energy and raw materials to tackle these problems. LÄS MER

4. 3. Ruthenium complexes and substituted polypyridines in photophysical and electron transfer studies

   Författare :Thomas Norrby; KTH; []
   Nyckelord :;

   Sammanfattning : Organic molecules acting as electron acceptors and ligandsfor metal complexes were synthesized. N-alkylation of4,4'-bipyridine and nicotinamide yielded electron transport andacceptor molecules. By regioselective functionalization of2,2'-bipyridine (bpy), several novel ligand molecules wereobtained. LÄS MER

5. 4. Studies of Hydrogenations and Isomerizations of Olefins and Alkylations of Amines Using Iridium Catalysts

   Författare :Jia-Qi Li; Pher Andersson; Jianliang Xiao; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Iridium; Asymmetric; Hydrogenation; Isomerization; Alkylation; Organisk kemi; Organic Chemistry;

   Sammanfattning : This thesis describes three types of reactions that were carried out using iridium catalysts.The first type is the iridium-catalyzed asymmetric hydrogenation of olefins. In paper I, the preparation of a new type of bicyclic thiazole-phosphine based iridium complex was described. LÄS MER

7. 5. Aromatic Allylation via Diazotization; Application in synthesis of heterocyclic compounds

   Författare :Fredrik Ek; Centrum för analys och syntes; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Bengamide analogue.; parallel synthesis; trimethylsilyl azide; cycloaddition; imidazole; fused tetrazole derivatives; iodocyclization; benzazepine; tert-butyl nitrite; allylic bromide; aromatic allylation; diazotization; Organic chemistry; Organisk kemi;

   Sammanfattning : A new method for allylation of aromatic systems has been developed. A number of arylamines were converted via diazotization to the corresponding allylaromatic compounds using tert-butyl nitrite and an excess of allylic bromides with complete regioselectivity. Electron-withdrawing groups, in the aromatic moiety, were necessary to obtain good yields. LÄS MER