Sökning: "aryl"

Visar resultat 1 - 5 av 178 avhandlingar innehållade ordet aryl.

1. 1. Palladium(II)-Catalyzed Addition Reactions : Synthesis of Aryl Amidines and Aryl Ketones

   Författare :Jonas Rydfjord; Mats Larhed; Adriaan Minnaard; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Palladium; Catalysis; Palladium II catalysis; Synthesis; Addition Reactions; Cyanamide; Amidine; Aryl Amidine; Nitrile; Ketone; Aryl Ketone; Carbopalladation; Continuous-flow; Continuous flow; Microwave heating; Farmaceutisk vetenskap; Pharmaceutical Science;

   Sammanfattning : Palladium-catalyzed reactions have become one of the most important tools in modern organic chemistry due to its ability to catalyze the formation of new carbon-carbon bonds.The aim of the work presented in this thesis was to develop new palladium(II)-catalyzed addition reactions. LÄS MER

3. 2. Heck Reactions with Aryl Chlorides : Studies of Regio- and Stereoselectivity

   Författare :Gopal K. Datta; Mats Larhed; Anders Hallberg; Martin Oestreich; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Heck reaction; aryl chloride; vinyl ether; regioselective; stereoselective; palladium; chelation control; microwave; Pharmaceutical chemistry; Farmaceutisk kemi;

   Sammanfattning : Homogeneous palladium-catalyzed Heck vinylation of aryl chlorides was investigated under air using Herrmann’s palladacycle and the P(t-Bu)3-liberating salt [(t-Bu)3PH]BF4. Based on the results, controlled microwave heating was utilized to accelerate model Heck reactions with aryl chlorides down to 30 min employing an electron-poor olefin and a mixture of an ionic liquid and 1,4-dioxane as solvent. LÄS MER

4. 3. Synthesis of Aryl Ethers : Metal-Free Arylation of Alcohols using Diaryliodonium Salts

   Författare :Erik Lindstedt; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : This thesis contains two parts showing different metal-free methods to synthesize aryl ethers using hypervalent iodine reagents, more specifically diaryliodonium salts. The first part describes arylation of benzylic and allylic alcohols and phenols in water using the easily accessible base sodium hydroxide. LÄS MER

5. 4. Palladium-Catalyzed Carbonylation and Arylation Reactions

   Författare :Jonas Sävmarker; Mats Larhed; Gary Molander; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; palladium; carbonylation; styrene; amidine; aryl ketones; aryl sulfinates; ESI-MS; aryltrifluoroborates; Organic Pharmaceutical Chemistry; Organisk farmaceutisk kemi;

   Sammanfattning : Palladium-catalyzed reactions have found widespread use in contemporary organic chemistry due to their impressive range of functional group tolerance and high chemo- and regioselectivity. The pioneering contributions to the development of the Pd-catalyzed C-C bond forming cross-coupling reaction were rewarded with the Nobel Prize in Chemistry in 2010. LÄS MER

7. 5. Platinum(II) and Palladium (II) Complexes with Group 14 and 15 Donor Ligands. Synthesis, Structure and Substitution Mechanisms

   Författare :Ola Wendt; Kemiska institutionen; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; mechanism; kinetics; substitution; platinum; palladium; aryl; silyl; nitrile; triphenylstibine; NMR; IR; Raman; X-ray crystallography; stopped-flow; synthesis; Inorganic chemistry; Oorganisk kemi;

   Sammanfattning : The present thesis deals with Pd(II) and Pt(II) complexes with group 14 and 15 donor ligands. Such complexes have been prepared and investigated mainly with regard to their ground state structures and the mechanism according to which they undergo substitution. LÄS MER