Sökning: "asymmetric"

Visar resultat 1 - 5 av 570 avhandlingar innehållade ordet asymmetric.

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

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Pradeep Cheruku; Uppsala universitet.; [2008]
    Nyckelord :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;

    Sammanfattning : 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. LÄS MER

  2. 2. Asymmetric Catalysis Ligand Design and Conformational Studies

    Detta är en avhandling från Stockholm : Kemi

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

    Sammanfattning : 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. LÄS MER

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

    Detta är en avhandling från Stockholm : Institutionen för organisk kemi

    Författare :Juhanes Aydin; Stockholms universitet.; [2009]
    Nyckelord :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;

    Sammanfattning : 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. LÄS MER

  4. 4. Asymmetric catalysis ligand design and microwave acceleration

    Detta är en avhandling från Stockholm : Kemi

    Författare :Ulf Bremberg; KTH.; [2000]
    Nyckelord :;

    Sammanfattning : 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. LÄS MER

  5. 5. Asymmetric Oligothiophenes Chemical Evolution of Multimodal Amyloid Ligands

    Detta är en avhandling från Linköping : Linköping University Electronic Press

    Författare :Leif B.G. Johansson; Linköpings universitet.; Linköpings universitet.; [2015]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Luminescent conjugated polymers (LCPs) and luminescent conjugated oligothiophenes (LCOs) can be used as molecular probes to study diseases associated with protein aggregation. The conventionally used dyes to study and detect protein aggregates, denoted amyloid, have been Congo red (CR) and Thioflavin T (ThT). LÄS MER