Search for dissertations about: "allylic silane"

Found 5 swedish dissertations containing the words allylic silane.

2. 1. Transition metal-catalyzed allylic and vinylic functionalization : Method development and mechanistic investigations

   Author : Johanna M. Larsson; Kálmán J. Szabó; Dennis G. Hall; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; palladium; copper; catalysis; Heck reaction; C-H functionalization; allylic substitution; silylation; borylation; trifluoromethylation; fluorination; mechanistic study; transition metal; alkene; allylic silane; allylic boronate; allylic fluoride; organisk kemi; Organic Chemistry;

   Abstract : The use of small molecule building blocks in, for example, pharmaceutical research and new material development, creates a need for new and improved organic synthesis methods. The use of transition metals as mediators and catalysts opens up new reaction pathways that have made the synthesis of completely new compounds possible as well as greatly improved the synthetic routes to known compounds. READ MORE

4. 2. Copper and Palladium-Mediated Transformationsof Allylic and Propargylic Substrates

   Author : Tony S. N. Zhao; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES;

   Abstract : This thesis is focused on the development of new palladium and copper-mediated reactions for functionalization of alkenes and propargylic alcohol derivatives. We have developed an efficient procedure for the synthesis of allenyl and propargyl boronate from propargylic carbonates and acetates. READ MORE

5. 3. Employment of Palladium Pincer Complex Catalysts and Lewis Acids for Synthesis and Transformation of Organometallic Compounds

   Author : Johan Kjellgren; Kálmán J. Szabó; Gerard van Koten; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Chemistry; Kemi;

   Abstract : This thesis is mainly focused on the development of new palladium catalyzed transformations using so-called “pincer” complexes. These complexes were applied as catalysts in two important areas of organometallic chemistry: substitution of propargylic substrates by dimetallic reagents; and allylation of aldehydes and imines by allylstannanes. READ MORE

6. 4. Development of Asymmetric Iridium Catalysed Hydrogenation Reactions

   Author : Suppachai Krajangsri; Pher Andersson; Patrick Guiry; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Asymmetric hydrogenation; Iridium catalyst; Peterson olefination; Dynamic Kinetic Resolution; organisk kemi; Organic Chemistry;

   Abstract : The focus of the work presented in this thesis is the development of iridium-catalysed asymmetric hydrogenation reactions.The first part of this thesis covers the development of dynamic kinetic resolution in asymmetric hydrogenation of chiral, racemic secondary allylic alcohols, which are converted to chiral saturated alcohols with high dr and ee. READ MORE

7. 5. Controlling the Reactivity and Selectivity in Iridium- and Rhodium-Catalyzed Asymmetric Hydrogenation

   Author : Haibo Wu; Pher Andersson; Virginie Ratovelomanana-Vidal; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Asymmetric hydrogenation; Cascade reaction; Kinetic resolution; Desymmetrization; Dearomatization; Total synthesis; Heterogeneous catalysis; organisk kemi; Organic Chemistry;

   Abstract : The work presented in this thesis is mainly focused on the development of iridium- or rhodium-catalyzed asymmetric hydrogenation featuring a number of practical concepts including cascade reaction, kinetic resolution, desymmetrization, and dearomatization. The protocols rely on gaining control of the reactivity among different olefins or olefin precursor as well as maintaining chemo- and stereo-selectivity in the hydrogenation. READ MORE