Search for dissertations about: "Aryl triflates"
Showing result 1 - 5 of 10 swedish dissertations containing the words Aryl triflates.
-
1. [11C]Carbon Monoxide and Aryl Triflates in Palladium-Mediated Carbonylation Reactions : Synthetic approaches to [11C]Carbonyl Compounds and [11C]Amines
Abstract : The usefulness of low concentrations (typically 10 to 100 µM) of [11C]carbon monoxide and aryl triflates as substrates in 11C-carbonylation using different nucleophiles in the presence of lithium bromide was investigated. The reactions were performed in a micro autoclave of 200 µL volume and catalysed (mediated) by palladium(0). READ MORE
-
2. Heck Reactions with Aryl Chlorides : Studies of Regio- and Stereoselectivity
Abstract : 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. READ MORE
-
3. Palladium-Catalyzed Carbonylation and Arylation Reactions
Abstract : 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. READ MORE
-
4. Efficient and High-Yielding Routes to Diaryliodonium Salts
Abstract : This thesis summarizes three novel and general reaction protocols for the synthesis of diaryliodonium salts. All protocols utilize mCPBA as oxidant and the acids used are either TfOH, to obtain triflate salts, or BF3•Et2O that gives the corresponding tetrafluoroborate salts in situ. READ MORE
-
5. Diaryliodonium Salts : Development of Synthetic Methodologies and α-Arylation of Enolates
Abstract : This thesis describes novel reaction protocols for the synthesis of diaryliodonium salts and also provides an insight to the mechanism of α-arylation of carbonyl compounds with diaryliodonium salts. The first chapter gives a general introduction to the field of hypervalent iodine chemistry, mainly focusing on recent developments and applications of diaryliodonium salts. READ MORE