Search for dissertations about: "nmr ester"

Showing result 1 - 5 of 33 swedish dissertations containing the words nmr ester.

2. 1. Self-adaptable catalysts : Importance of flexibility and applications in asymmetric catalysis

   Author : Ester Fjellander; Christina Moberg; Jay Siegel; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; adaptable; flexible; semi-flexible; symmetry; conformational study; mechanistic study; rotation barrier; VT NMR; asymmetric catalysis; ligand design; allylic alkylation; hydrogenation; azepines; dioxaphosphepines; phosphepines; amines; phosphines; phosphoramidites; phosphinites; palladium; rhodium; Organic chemistry; Organisk kemi;

   Abstract : The topic of this thesis is the design and synthesis of biaryl-based self adaptableligands for asymmetric metal catalysis. The results discussed in papers I-III are covered, together with some unpublished results concerning substrate-adaptable catalysts. A general survey of self-adaptable catalysts is presented first. READ MORE

4. 2. Synthetic and Mechanistic Studies with Iodine(III) Reagents

   Author : Ester Maria Di Tommaso; Berit Olofsson; Marcos Suero; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; hypervalent iodine chemistry; organic synthesis; mechanistic studies; DFT; photocatalysis; Organic Chemistry; organisk kemi;

   Abstract : This thesis describes the development of metal-free transformations and mechanistic studies on the reactivity of two classes of hypervalent iodine reagents: diaryliodonium salts and vinylbenziodoxolones (VBX). Recently, they have been recognized as valuable synthetic reagents with broad applicability in organic synthesis. READ MORE

5. 3. Structure, dynamics and reactivity of carbohydrates : NMR spectroscopic studies

   Author : Jerk Rönnols; Göran Widmalm; Mikael Bols; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Carbohydrates; Conformation; NMR spectroscopy; Hydrogen bond; organisk kemi; Organic Chemistry;

   Abstract : The main focus of this thesis is on the ring conformations of carbohydrate molecules; how the conformational equilibria and the rates of the associated interconversions are affected by the molecular constitution and their surroundings.The conformational equilibria of a group of amine linked pseudodisaccharides, designed as potential glycosidase inhibitors, comprising α-D-altrosides are described in Chapter 3. READ MORE

6. 4. Structure-Property Relationships of Surfactants at Interfaces and Polyelectrolyte-Surfactant Aggregates

   Author : Mikael Kjellin; KTH; []
   Keywords : nonionic surfactant; sugar surfactant; poly ethylene oxide ; amide; ester; polyelectrolyte; SDS; hydrophobic surface; glass surface; mica; adsorption; aggregation; micelle size; surface forces; wetting; dynamic surface tension; NMR; TRFQ; SANS; SAXS; ;

   Abstract : The first part of this thesis is concerned with thestructure-property relationships in nonionic surfactantsystems. The main aim was to investigate how the surfactantstructure influences the adsorption at interfaces andinteractions between surfactant coated interfaces. READ MORE

7. 5. Exploring the structure of oligo- and polysaccharides : Synthesis and NMR spectroscopy studies

   Author : Hanna Jonsson; Göran Widmalm; Antonio Molinaro; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Carbohydrates; NMR spectroscopy; synthesis; lipopolysaccharides; conformational studies; Organic chemistry; Organisk kemi; organisk kemi; Organic Chemistry;

   Abstract : A deeper understanding of the diversity of carbohydrates and the many applications of oligo- and polysaccharides found in nature are of high interest. Many of the processes involving carbohydrates affect our everyday life. This thesis is based on six papers all contributing to an extended perspective of carbohydrate property and functionality. READ MORE