Sökning: "Decarboxylation"

Visar resultat 11 - 15 av 23 avhandlingar innehållade ordet Decarboxylation.

  1. 11. Green Chemistry in Chemical Education and Synthetic Applications of Sulfinamides

    Författare :Björn Blomkvist; Peter Dinér; José Alemán; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Sulfinamide; Green Chemistry; Chiral Auxiliary; Photoredox; Teaching; Sulfinamid; Grön Kemi; Kiral Hjälpgrupp; Fotoredox; Undervisning; Kemi; Chemistry;

    Sammanfattning : The preparation of chiral molecules, i.e. compounds that are not identical to their mirror image, is of great interest in the field of organic chemistry. LÄS MER

  3. 12. Palladium(II)-Catalyzed Coupling Reactions

    Författare :Jonas Lindh; Mats Larhed; Matthew S. Sigman; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Palladium II ; oxidative Heck reactions; Microwaves; Styrenes; Aryl ketones; Continuous flow; ESI-MS; Pharmaceutical chemistry; Farmaceutisk kemi; Medicinal Chemistry; Läkemedelskemi;

    Sammanfattning : Sustainable chemical processes are becoming increasingly important in all fields of synthetic chemistry. Catalysis can play an important role in developing environmentally benign chemical processes, and transition metals have an important role to play in the area of green chemistry. LÄS MER

  4. 13. Structural Studies of Polyamine Biosynthesis Enzymes: Potential Targets for Drugs against Tropical Parasites

    Författare :Veronica Tamu Dufe; Biokemi och Strukturbiologi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; inhibitors; protein crystallography; Molecular biophysics; Molekylär biofysik; tropical parasites; polyamine biosynthesis enzymes;

    Sammanfattning : Two enzymes involved in the biosynthesis of polyamines, ornithine decarboxylase (ODC, from human and Leishmania donovani) and spermidine synthase (SPDS, from Plasmodium falciparum and Caenorhabditis elegans) were studied using biochemical methods, homology modelling and X-ray crystallography. ODC catalyses the first and committed step in polyamine biosynthesis, the decarboxylation of ornithine to putrescine. LÄS MER

  5. 14. Hydrothermal alteration of organic matter at spreading centers

    Författare :Eva Andersson; Bernd R.T. Simoneit; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chemistry; Kemi; Biogeochemistry; biogeokemi;

    Sammanfattning : Alteration of organic matter, mainly amino acids, at sub-seafloor hydrothermal conditions has been investigated by performing laboratory experiments and by studying deep-sea sediments from hydrothermally active areas on the northern Juan de Fuca Ridge, northeast Pacific Ocean.Quaternary sediments from Middle Valley and the eastern flank of the Juan de Fuca Ridge recovered during the Ocean Drilling Program Legs 139 and 168 have been analyzed for total hydrolyzable amino acid concentrations, individual amino acid abundances and stereochemistry in order to evaluate the effects of hydrothermal stress on the decomposition of sedimentary amino acids. LÄS MER

  7. 15. Asymmetric Synthesis using Redox-Active Diazocompounds as Chiral Carbon Atom Precursors

    Författare :Matteo Costantini; Abraham Mendoza; Armido Studer; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; redox-active carbenes; mechanistic investigation; cyclopropanes; asymmetric catalysis; photochemistry; organisk kemi; Organic Chemistry;

    Sammanfattning : This thesis summarizes the development of general and efficient methods to synthesize enantiomerically enriched cyclopropane compounds. The works reported herein exploit the opportunity presented by redox-active esters to explore the orthogonality between asymmetric carbene-transfer and geminal radical generation. LÄS MER