Epoxidations and Hydroperoxidations of α,β-Unsaturated Ketones (eBook)

An Approach through Asymmetric Organocatalysis

Corinna Reisinger (Autor)

eBook Download: PDF

2012 | 2011
XVI, 260 Seiten
Springer Berlin (Verlag)
978-3-642-28118-1 (ISBN)

Infos

Corinna Reisinger has developed a new organocatalytic asymmetric epoxidation of cyclic and acyclic ?,?-unsaturated ketones. In this thesis, Corinna documents her methodology, using primary amine salts as catalysts, and hydrogen peroxide as an inexpensive and environmentally benign oxidant. She describes the unprecedented and powerful catalytic asymmetric hydro­peroxi­dation of ?,?-enones, a process which produces optically active five-membered cyclic peroxyhemiketals in a single operation. She also proves the versatility and synthetic value of the cyclic peroxyhemiketals by converting them into highly enantioenriched acyclic and cyclic aldol products. Currently, these cyclic aldol products are inaccessible by any other synthetic means. Furthermore, cyclic peroxyhemiketals are precursors to optically active 1,2-dioxolanes which are of biological relevance. This work is a breakthrough in the field of asymmetric epoxidation chemistry and outlines the most efficient method in the literature for generating highly enantioselective cyclic epoxyketones known to date.

Inhalt

Background.- Asymmetric Organocatalysis.- Catalytic Asymmetric Epoxidation of Electron-Deficient Olefins.- Synthesis and Relevance of 3-Hydroxy-1,2-dioxolanes and 1,2-Dioxolanes.- Objectives of this Ph.D. Work.- Results and Discussion.- Catalytic Asymmetric Epoxidation of Cyclic Enones.- Catalytic Asymmetric Epoxidation and Hydroperoxidation of Acyclic Enones.- Synthetic Transformations of Optically Active a,ß-Epoxy Ketones and 3-Hydroxy-1,2-dioxolanes.- Summary and Conclusions.- Mechanistic Considerations.- Preparation of Starting Materials.- Catalyst Synthesis.- Summary.- Outlook.- Experimental Part.- General Experimental Conditions.- Catalytic Asymmetric Epoxidation of Cyclic Enones.- Catalytic Asymmetric Hydroperoxidation and Epoxidation of Acyclic Enones.- Synthetic Transformations of Optically Active Products.- Preparation of Starting Materials.- Catalyst Synthesis.

Produkt-Details

• Erscheint lt. Verlag: 1.6.2012
• Reihe/Serie: Springer Theses
• Reihe/Serie: Springer Theses
• Zusatzinfo: XVI, 260 p.
• Verlagsort: Berlin
• Sprache: englisch
• Themenwelt: Naturwissenschaften ► Chemie ► Organische Chemie
• Themenwelt: Technik
• Schlagworte: Asymmetric counteranion-directed catalysis • Asymmetric peroxidation reactions • Asymmetric synthesis of epoxy ketones • Cinchona alkaloid derivatives as organocatalysts • Organocatalytic epoxidation of unsaturated ketones
• ISBN-10: 3-642-28118-4 / 3642281184
• ISBN-13: 978-3-642-28118-1 / 9783642281181