Search for dissertations about: "Kalman Szabo"

Showing result 1 - 5 of 25 swedish dissertations containing the words Kalman Szabo.

2. 1. Catalytic Regio- and Stereoselective Reactions for the Synthesis of Allylic and Homoallylic Compounds

   Author : Rauful Alam; Kalman Szabo; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; palladium catalysis; C−H functionalization; boronic acid; allylboration; asymmetric catalysis; allylic; homoallylic; diastereoselective; enantioselective; organisk kemi; Organic Chemistry;

   Abstract : This thesis is focused on two main areas of organic synthesis, palladium-catalyzed functionalization of alkenes and allylic alcohols, as well as development of new allylboration reactions.We have developed a palladium-catalyzed selective allylic trifluoroacetoxylation reaction based on C−H functionalization. READ MORE

4. 2. Novel Pincer Complex-Catalyzed Transformations : Including Asymmetric Catalysis

   Author : Juhanes Aydin; Kálmán J. Szabó; Oleg V. Ozerov; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; pincer; palladium; catalysis; chiral; asymmetric; palladium IV; allylation; aldol; aminoacid; C-H functionalization; cross-coupling; homoallylic; heck reaction; tridentate ligand; Chemistry; Kemi; Organic Chemistry; organisk kemi;

   Abstract : This thesis is focused on the development of new pincer complex-catalyzed transformations. Optimization of the catalytic properties (fine-tuning) was directed to increase the catalytic activity as well as the chemo-, stereo- and enantioselectivity of the complexes. READ MORE

5. 3. Development of new Fluorination Methods Directed to Fluorine-18 Labelling

   Author : Miguel Ángel Cortés González; Kálmán J. Szabó; Guosheng Liu; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; fluorine; fluorine-18; late-stage; labelling; nucleophilic; electrophilic; fluorination; positron emision tomography; PET; hypervalent iodine; benziodoxole; metal-free; DBU; copper; palladium; rhodium; carbene; organisk kemi; Organic Chemistry;

   Abstract : This thesis deals with the development of new fluorination reactions and their application to fluorine-18 labelling. Fluorine-18 labelled compounds are employed as tracers in Positron Emission Tomography (PET), which is a powerful non-invasive imaging method in medical diagnostics. READ MORE

6. 4. Synthesis of chiral allyl and propargyl boronates by organocatalytic carbene insertion to carbon-boron bonds

   Author : Marie Deliaval; Kálmán Szabó; Fahmi Himo; Carlos Valdés; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; boron; asymmetric synthesis; organocatalysis; allylic compounds; allenols; Organic Chemistry; organisk kemi;

   Abstract : This thesis describes the development of a novel organocatalytic method for the synthesis of chiral allyl- and propargyl- organoboron compounds with high enantioselectivity. These organoboron species are versatile building blocks in asymmetric synthesis.We have developed a new efficient homologation method of alkenyl boronic acids. READ MORE

7. 5. Asymmetric Hydrogenations of Imines, Vinyl Fluorides, Enol Phosphinates and Other Alkenes Using N,P-Ligated Iridium Complexes

   Author : Jarle Sidney Diesen; Pher G. Andersson; Kálmán J. Szabó; Uppsala universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Organic chemistry; Catalysis; Asymmetric; Hydrogenations; Reductions; Alkenes; Imines; Vinyl fluorides; Enolphosphinates; Transition metal; Complexes; Iridium; Organisk kemi; Chemistry; Kemi;

   Abstract : The research described in this thesis is directed toward the efficient, enantioselective synthesis of chiral products that have useful functionality. This goal was pursued through catalytic asymmetric hydrogenation, a reaction class that selectively introduces one or two stereocenters into a molecule in an atom-efficient step. READ MORE