Search for dissertations about: "heck"

Showing result 1 - 5 of 43 swedish dissertations containing the word heck.

  1. 1. Palladium(II)-Catalyzed Heck Reactions Domino Reactions, Decarboxylations, Mechanistic Studies & Continuous Flow Applications

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Ashkan Fardost; Uppsala universitet.; [2015]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; palladium II ; dft; reaction mechanisms; esi-ms; heck; decarboxylation; microwave; continuous flow;

    Abstract : This thesis describes research efforts dedicated to the development of palladium(II)-catalyzed oxidative Heck and Heck/Suzuki domino reactions, and the applications of a new microwave heating technology, purpose-built for continuous flow in organic synthesis.Paper I describes the development of a ligand-modulated approach for attaching aryl groups to a chelating vinyl ether. READ MORE

  2. 2. Palladium(II)-Catalysed Heck and Addition Reactions Exploring Decarboxylative and Desulfitative Processes

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Bobo Skillinghaug; Uppsala universitet.; [2016]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Palladium; catalysis; palladium II catalysis; synthesis; Heck; carboxylic acid; sulfinic acid; sodium sulfinate; nitrile; styrene; ketone; aryl ketone; electrospray ionization mass spectrometry; density functional theory; microwave heating; continuous flow; Chemistry with specialization in Organic Chemistry; Kemi med inriktning mot organisk kemi;

    Abstract : Palladium complexes have the ability to catalyse cross-coupling of two organic moieties through the formation of transient metal-carbon bonds, thus bringing them closer to each other to facilitate the formation of a new bond. Palladium-catalysed coupling reactions are one of the most important carbon-carbon forming reactions available to organic chemists and many of these reactions rely on the reactivity of aryl-palladium complexes. READ MORE

  3. 3. Heck Reactions with Aryl Chlorides Studies of Regio- and Stereoselectivity

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Gopal K. Datta; Uppsala universitet.; [2008]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Heck reaction; aryl chloride; vinyl ether; regioselective; stereoselective; palladium; chelation control; microwave; PHARMACY Pharmaceutical chemistry; FARMACI Farmaceutisk kemi;

    Abstract : Homogeneous palladium-catalyzed Heck vinylation of aryl chlorides was investigated under air using Herrmann’s palladacycle and the P(t-Bu)3-liberating salt [(t-Bu)3PH]BF4. Based on the results, controlled microwave heating was utilized to accelerate model Heck reactions with aryl chlorides down to 30 min employing an electron-poor olefin and a mixture of an ionic liquid and 1,4-dioxane as solvent. READ MORE

  4. 4. Mechanistic investigation of platinum and palladium catalysed cross- coupling reactions. Implications for the Stille and Heck reactions

    University dissertation from Department of Chemistry, Lund University

    Author : Patrik Nilsson; Lund University.; Lunds universitet.; [2005]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Metallorganisk kemi; Organometallic chemistry; Oorganisk kemi; Inorganic chemistry; parameter fitting; numerical solutions; platinum II ; palladium II ; NMR spectroscopy; transmetallation; Heck; Stille; kinetics; mechanism;

    Abstract : The present thesis deals with various types of palladium(II) and platinum(II) complexes and their use in homogeneous catalysis. The focus has been devoted to mechanistic investigations concerning the Stille and Heck reactions and studies under both catalytic and stoichiometric conditions were conducted. READ MORE

  5. 5. Regioselective Heck Coupling Reactions Focus on Green Chemistry

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Karl S. A. Vallin; Uppsala universitet.; [2003]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Pharmaceutical chemistry; Farmaceutisk kemi; PHARMACY Pharmaceutical chemistry; FARMACI Farmaceutisk kemi; Medicinal Chemistry; läkemedelskemi;

    Abstract : Carbon-carbon bond formation reactions are among the most important processes in chemistry, as they represent key steps in the synthesis of more complex molecules from simple precursors. This thesis describes mainly the development of novel regioselective applications of the mild and versatile palladium-catalyzed carbon-carbon coupling method, commonly known as the Heck reaction. READ MORE