Search for dissertations about: "asymmetric catalysis"

Showing result 1 - 5 of 84 swedish dissertations containing the words asymmetric catalysis.

  1. 1. Asymmetric Catalysis Ligand Design and Conformational Studies

    University dissertation from Stockholm : Kemi

    Author : Kristina Hallman; [2001]
    Keywords : asymmetric catalysis; chiral ligand; oxazolines; conformational study; allylic substitution; polymer-bound ligands; dendritic ligands; crown ether; oxidations; palladacycle;

    Abstract : This thesis deals with the design of ligands for efficientasymmetric catalysis and studies of the conformation of theligands in the catalytically active complexes. All ligandsdeveloped contain chiral oxazoline heterocycles. READ MORE

  2. 2. Novel Pincer Complex-Catalyzed Transformations Including Asymmetric Catalysis

    University dissertation from Stockholm : Institutionen för organisk kemi

    Author : Juhanes Aydin; Kálmán J. Szabó; Oleg V. Ozerov; [2009]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; pincer; palladium; catalysis; chiral; asymmetric; palladium IV; allylation; aldol; aminoacid; C-H functionalization; cross-coupling; homoallylic; heck reaction; tridentate ligand; NATURAL SCIENCES Chemistry; NATURVETENSKAP Kemi; Organic Chemistry; organisk kemi;

    Abstract : This thesis is focused on the development of new pincer complex-catalyzed transformations. Optimization of the catalytic properties (fine-tuning) was directed to increase the catalytic activity as well as the chemo-, stereo- and enantioselectivity of the complexes. READ MORE

  3. 3. Asymmetric catalysis ligand design and microwave acceleration

    University dissertation from Stockholm : Kemi

    Author : Ulf Bremberg; [2000]
    Keywords : ;

    Abstract : This thesis deals partly with the design and synthesis ofligands for use in asymmetric catalysis, and partly with theapplication of microwave heating on metal-based asymmetriccatalytic reactions.Enantiomerically pure pyridyl alcohols and bipyridylalcohols were synthesized from the chiral pool for future usein asymmetric catalysis. READ MORE

  4. 4. Asymmetric Hydrogenations Syntheses of Ligands and Expansion of Substrate Scope

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Pradeep Cheruku; Pher Andesson; Jay Siegel; [2008]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Catalysis; Asymmetric; Hydrogenations; Reductions; Olefins; Imines; Enol phosphinates; Transition metal; Complexes; Iridium; Enamines; Ruthenium; Ligands; Trifluoromethyl; Diphenylvinylphosphine oxides; Vinyl phosphonates; NATURAL SCIENCES Chemistry; NATURVETENSKAP Kemi;

    Abstract : Asymmetric hydrogenation has emerged as a versatile methodology to obtain a wide range of chiral precursors. This thesis focused on the synthesis of new chiral ligands and the expansion of the substrate scope of asymmetric hydrogenations. READ MORE

  5. 5. Synthesis and Evaluation of N,P-Chelating Ligands in Asymmetric Transition-Metal-Catalyzed Reactions Ir-Catalyzed Asymmetric Hydrogenation and Pd-Catalyzed Asymmetric Intermolecular Heck Reaction

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Päivi Tolstoy; Pher G. Andersson; Göran Hilmersson; [2009]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Asymmetric hydrogenation; Heck reaction; N; P ligand; Iridium; Palladium; Asymmetric catalysis; Alkenes; Fluorine; Diarylmethine stereocenters; NATURAL SCIENCES Chemistry; NATURVETENSKAP Kemi; organisk kemi; Organic Chemistry;

    Abstract : This thesis describes synthesis of new chiral N,P ligands and their evaluation in two types of asymmetric transition-metal catalyzed reactions.The first part of the thesis describes studies in iridium-catalyzed asymmetric hydrogenation. READ MORE