Sökning: "chloro complex"

Visar resultat 1 - 5 av 11 avhandlingar innehållade orden chloro complex.

  1. 1. Initiation and Repassivation of Pits on Austenitic Stainless Steel

    Författare :Fredrik Falkenberg; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; chloro complex; pitting corrosion; metastable pits; phosphate; nitrogen; passive film; chloride; repassivation; molybdenum; austenitic stainless steel;

    Sammanfattning : Stainless steels can be damaged by pitting corrosion in presence of aggressive anions, such as halide ions. The aim of this work was to study different aspects on initiation and repassivation of pits on austenitic stainless steel in chloride solutions at ambient temperature. LÄS MER

  3. 2. Ruthenium-Catalyzed Hydrogen Transfer Reactions : Mechanistic Studies and Chemoenzymatic Dynamic Kinetic Resolutions

    Författare :Madeleine Warner; Jan-Erling Bäckvall; Andreas Pfaltz; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Hydrogen transfer; ruthenium catalysis; kinetic resolution; dynamic kinetic resolution; racemization; asymmetric synthesis; organisk kemi; Organic Chemistry;

    Sammanfattning : The main focus of this thesis lies on transition metal-catalyzed hydrogen transfer reactions. In the first part of the thesis, the mechanism for racemization of sec-alcohols with a ruthenium complex, Ru(CO)2Cl(η5-C5Ph5) was studied. LÄS MER

  4. 3. The kinetic mechanism of microsomal glutathione transferase 1 (MGST1)

    Författare :Richard Svensson; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Glutathione; glutathione transferase; enzyme mechanism; pre-steady state kinetics; steady state kinetics; membrane protein; xenobiotic metabolism.;

    Sammanfattning : Microsomal glutathione transferase I (MGST1) is a homotrimeric membrane-bound enzyme involved in detoxication of numerous toxic electrophilic compounds, e.g. halogenated alkenes and arenes, alpha, beta-unsaturated hydrocarbons and peroxides. MGST1 is expressed in large amounts in most organs, which speaks for an important role for this enzyme. LÄS MER

  5. 4. Syntheses of some tri- and tetracyclic heterocycles containing an indole moiety

    Författare :Robert Engqvist; jan Bergman; Victor Snieckus; Södertörns högskola; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Alkaloid; drug development; heterocycles; indole; metabolite; synthesis; X-ray crystallography;

    Sammanfattning : This thesis deals with the development of new synthetic methods leading to fused tri- and tetracyclic heterocycles, many of which have interesting biological activity such as antiviral and DNA intercalating properties. The reactions between isatins and 2-aminobenzylamine in acetic acid can give, depending on the conditions, either complex spirooxindoles or indolo[3,2-c]quinolin-6-ones. LÄS MER

  7. 5. Natural Product Synthesis and Development of Novel Reaction Methodology

    Författare :Jakob Danielsson; Centrum för analys och syntes; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; perophoramidine; communesin; quaternary stereocenter; Diels-Alder; 1; 2-asymmetric induction; polar Felkin-Anh; Cornforth-Evans; Mukaiyama aldol; 3-dipolar cycloaddition; azomethine ylide; 2-amino alcohol; anti-α-amino-β-hydroxy ester;

    Sammanfattning : This thesis deals with the development of new reaction methodology for stereoselective synthesis, as well as total synthesis of natural products and investigations of the stereochemical outcome in the Mukaiyama aldol reaction. Chapter 2 describes efforts made towards the total synthesis of the oxindole natural products perophoramidine and the communesin. LÄS MER