Sökning: "oxidative coupling reaction"

Visar resultat 1 - 5 av 22 avhandlingar innehållade orden oxidative coupling reaction.

1. 1. degradable electroactive polymers: Synthesis, Macromolecular architecture and scaffold design

   Författare :Baolin Guo; Ann-Christine Albertsson; Patric Jannasch; KTH; []
   Nyckelord :Poly lactide ; poly ε-caprolactone ; ring-opening polymerization; carboxyl-capped aniline trimer; carboxyl-capped aniline pentamer; phenyl amino-capped aniline tetramer; coupling reaction; DCC DMAP system; degradability; electroactivity; conductivity; macromolecular architecture; chitosan; hydrogel; block copolymer; functionalization; oxidative coupling reaction; self-assembly; toxicity; tubular porous scaffold; neural tissue engineering.;

   Sammanfattning : Electrically conducting polymers induce specific cellular responses at the molecular level. One of the crucial limitations of the use of conducting polymers in tissue engineering is their inability to degrade. LÄS MER

3. 2. Novel Metal-Mediated Organic Transformations : Focusing on Microwave Acceleration and the Oxidative Heck Reaction

   Författare :Per-Anders Enquist; Mats Larhed; Anders Hallberg; Troels Skrydstrup; Uppsala universitet; []
   Nyckelord :Organic chemistry; palladium II ; oxidative Heck reaction; high-throughput-chemistry; microwave acceleration; dicobalt octacarbonyl; in situ carbonylation; urea; diaryl ketones; ESI-MS; Organisk kemi;

   Sammanfattning : Transition metals have played an important role in synthetic organic chemistry for more than a century, and offer catalytic transformations that would have been impossible with classical chemistry. One of the most useful and versatile of the transition metals is palladium, which over the years has catalyzed many important carbon-carbon forming reactions. LÄS MER

4. 3. Compounds with Non-Buttressed Metal-Metal Bond between Platinum and Thallium. Model Systems for Photoinduced Two-Electron-Transfer

   Författare :Mikhail Maliarik; KTH; []
   Nyckelord :thallium; platinum; cyanide; metal-metal bond; non-buttressed; heterometallic; photoinduced; electron transfer; redox reaction; NMR; chemical shift; spin-spin coupling constant; Raman; EXAFS; X-ray diffraction; equilibrium; oxidation state; oxidative;

   Sammanfattning : A new family of oligonuclear cyano compounds incorporatingtransition (Pt) and main group (Tl) metals bound with anon-buttressed Pt-Tl bond was synthesised in aqueous solution.The metal-metal linkage is formed in the reaction betweenplatinum and thallium in their stable oxidation forms, Pt(II)and Tl(III), orvice versa: Pt(IV) and Tl(I). LÄS MER

5. 4. Studies on Oxidative Couplings in H-Phosphonate Chemistry

   Författare :Johan Nilsson; Jacek Stawinski; Esther Kuyl-Yeheskiely; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; oxidative coupling; H-phosphonate; H-phosphonothioate; organisk kemi; Organic chemistry; Organisk kemi;

   Sammanfattning : In this thesis oxidative coupling of H-phosphonate and H phosphonothioate diesters with different alcohols and amines are presented. Since the reactions with alcohols previously have been particularly unfavourable due to competing side reactions, a modified protocol leading to high coupling yields of structurally diverse hydroxylic components was developed. LÄS MER

7. 5. Iron catalyzed C-C coupling reactions - mechanistic investigations

   Författare :Anna Hedström; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; iron; homogenous catalysis; cross coupling; C-C bond formation; reaction mechanisms; kinetic investigations; competitive Hammett study; density functional theory;

   Sammanfattning : The mechanism of the iron catalyzed cross coupling of aryl electrophiles with alkyl Grignard reagents was studied. The reaction proceeds via a rate-limiting oxidative addition of the aryl halide to an Fe(I) complex generated in situ. A transmetalation from an aryl Grignard reagent occurs either before or after the oxidative addition. LÄS MER