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Showing 1 to 12 of 12 for “"asymmetrische Katalyse"”.
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Chirale Phosphortriamide und Phosphin-Phosphoramidite als Liganden für die asymmetrische Katalyse
Asymmetric catalysis with transition metal complexes containing chiral ligands is an efficient tool for the synthesis of enantioenriched compounds, which can be used as active pharmaceutical ingredients, agrochemicals, flavors or fragrances. The development of novel chiral ligands plays a major …
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Asymmetrische Synthese von cyclischen allylischen S-tert-Butylsulfonen : Pd-katalysierte kinetische Racematspaltung racemischer Allylcarbonate und zur Struktur chiraler, cyclischer allylischer Alpha-tert-Butylsulfonyl-Carbanionen
Aim of this project was the asymmetric synthesis of cyclic allylic tert-butylsulfones by Pd-catalyzed asymmetric substitution in presence of a chiral bisamide-bisphosphane-Ligand. The sulfones were formed from the corresponding racemic carbonates and lithium-tert-butylsulfinate in a two phase …
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Synthese neuartiger Sulfonimidamide zur Anwendung in der asymmetrischen Katalyse
In the context of this research the synthesis of novel sulfonimidamides and their modification was envisaged with regard to their application in asymmetric catalysis. The first part of this work was dedicated to the synthesis of these highly oxidized sulfur compounds. Starting from sulfinic acid …
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Palladium-katalysierte kinetische Racematspaltung allylischer Carbonate mit S-Nukleophilen und enantioselektive Umlagerung allylischer O-Sulfinate : asymmetrische Synthese von allylischern Sulfiden und Sulfonen
The palladium(0) catalyzed reactions of symmetrically disubstituted racemic allylic carbonates, being either cyclic or acyclic, with 2-pyrimidinethiol in the presence of N,N'-(1R,2R)-1,2-cyclohexanediyl-bis[2-(diphenylphosphino)-benzamide] BPA as ligand proceed with excellent levels of …
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Chirale Sulfonimidamide und Sulfoximine : Synthese, Strukturuntersuchungen und Anwendungen
This thesis describes the synthesis and structure determination of chiral sulfur-containing compounds, their use in asymmetric catalysis and the determination of the basicity of a bissulfoximine. In the first part the preparation of enantio- and diastereomerically pure sulfonimidamides bearing …
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Neue Zugänge zu enantioselektiven lipolytischen Enzymen durch fluoreszenzbasierte Durchmusterung kombinatorischer Bibliotheken
Die vorliegende Arbeit beschreibt die Entwicklung und Erprobung eines Hochdurchsatz-Durchmusterungsverfahrens zur Identifizierung und Isolierung von Varianten lipolytischer Enzyme mit veränderter Enantioselektivität. Es kombiniert die Zelloberflächenpräsentation lipolytischer Enzyme mit einer neuen …
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Synthesis of chiral phosphino-sulfoximines through phospha-Michael addition and their evaluation as 1,5-P,N-Ligand in asymmetric allylic alkylation
Despite the availability of several classes of P,N-ligands, there is still a quest for this new type of ligands for many catalytic applications. This work describe the synthesis of new phosphino-sulfoximines and their application as 1,5-P,N-ligand in palladium-catalyzed asymmetric allylic …