Search for dissertations about: "Iridium"

Showing result 21 - 25 of 85 swedish dissertations containing the word Iridium.

  2. 21. Asymmetric Hydrogenations : Syntheses of Ligands and Expansion of Substrate Scope

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

  4. 22. Development of New Synthetic Routes to Organoboronates by Catalytic Allylic Substitution and C-H bond Functionalization

    Author : Vilhelm Olsson; Kálmán Szabó; Gary A. Molander; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Palladium; Iridium; Boron; Catalysis; Organic chemistry; Organisk kemi; organisk kemi; Organic Chemistry;

    Abstract : This thesis describes the development of new catalytic methods for the synthesis and application of organometallic reagents, mainly focusing on allylboronic acid derivatives. Thus, palladium pincer-complex catalysis has been applied for extending the scope of palladiumcatalyzed borylation reactions in the synthesis of regio- and stereodefined functionalized allylboronic acid derivatives. READ MORE

  5. 23. Hydrogenation, Transfer Hydrogenation and Hydrogen Transfer Reactions Catalyzed by Iridium Complexes

    Author : Xu Quan; Pher Andersson; Jonathan Williams; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Iridium catalyst; carbene; N; P - ligand; asymmetric hydrogenation; transfer hydrogenation; hydrogen transfer reaction; alkylation; olefin; ketone; amide; organisk kemi; Organic Chemistry;

    Abstract : The work described in this thesis is focused on the development of new bidentate iridium complexes and their applications in the asymmetric reduction of olefins, ketones and imines. Three new types of iridium complexes were synthesized, which included pyridine derived chiral N,P-iridium complexes, achiral NHC complexes and chiral NHC-phosphine complexes. READ MORE

  6. 24. Convergent and Tandem Strategies in Iridium-Catalyzed Asymmetric Hydrogenation of Olefins

    Author : Luca Massaro; Pher Andersson; Antoni Riera; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Enantioconvergent catalysis; asymmetric hydrogenation; iridium catalysis; tandem reaction; mechanistic investigation; Organic Chemistry; organisk kemi;

    Abstract : The work presented in this thesis describes the development of enantioselective methods and their corresponding mechanistic studies to expand the field of catalytic asymmetric hydrogenation. Efficient catalytic systems based on iridium complexes were designed and employed in convergent and tandem strategies to prepare important optically enriched organic compounds. READ MORE

  7. 25. NHC,P- and N,P-Iridium Catalysts for Hydrogenations and Hydrogen Transfer Reactions

    Author : Sutthichat Kerdphon; Pher Andersson; Anton Vidal; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Iridium catalyst; carbene; N; P-ligand; asymmetric hydrogenation; alkylation; hydrogen transfer reaction; organisk kemi; Organic Chemistry;

    Abstract : The work described in this thesis is focused on hydrogenation and hydrogen transfer reactions using iridium catalysts. The first part concerns the use of N-heterocyclic carbene-phosphine iridium complexes in alkylation reactions (Chapters 2 and 3) and the hydrogenation of ketones (Chapter 4). READ MORE