Sökning: "cycloadditions"
Visar resultat 1 - 5 av 6 avhandlingar innehållade ordet cycloadditions.
1. Design and synthesis of rhodium and iridium bis-η2 diolefin catalysts: : Applications in C–C bond formation and asymmetric catalysis
Sammanfattning : This thesis deals with the design and synthesis of rhodium and iridium bis-η2 diolefin catalysts and their applications in C–C bond formation and asymmetric catalysis.More specifically, the second chapter describes the development of inter- and intramolecular (5+2) cycloadditions catalyzed by cationic iridium(I) complexes that lead to the formation of seven-membered rings in a single step. LÄS MER
2. Synthesis of Nitrogen Heterocycles via 1,3-Dipolar Cycloadditions - Method Development and Applications
Sammanfattning : Because of the diverse properties displayed by nitrogen heterocycles, they are one of the most commonly used structural elements in drug discovery. Due to this variation in properties, however, the chemistry and synthetic pathway to each heterocycle is unique. LÄS MER
3. Stereoselectivity in organic chemistry : asymmetric 1,3-dipolar cycloadditions and rule-based conformational analysis
Sammanfattning : .... LÄS MER
4. Lewis Acid Mediated Alkylation and Diels-Alder Reactions of 2H-Azirines
Sammanfattning : This thesis describes the use of 2H-azirines as reactivesubstrates in Lewis acid catalysed nucleophilic additions andin the Diels-Alder reaction.A number of carbon nucleophiles have been added to aseries of 2H-azirines in the presence and absence ofBF3·Et2O. LÄS MER
5. Natural Product Synthesis and Development of Novel Reaction Methodology
Sammanfattning : This thesis deals with the development of new reaction methodology for stereoselective synthesis, as well as total synthesis of natural products and investigations of the stereochemical outcome in the Mukaiyama aldol reaction. Chapter 2 describes efforts made towards the total synthesis of the oxindole natural products perophoramidine and the communesin. LÄS MER