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Showing 1 to 8 of 8 for “"Sulfoximinen"”.
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Synthese chiraler Sulfone aus Sulfoximinen in Lösung und an fester Phase
Synthesis of chiral sulfones using sulfoximines in solution and on solid phase Abstract: Allylic sulfoximines were synthesised in a one pot reaction starting from (S)-N,S-dimethylphenylsulfoximine in high yields. The following g-hydroxyalkylation with functionalised aldehydes was achieved with …
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Asymmetrische Synthese 3-substituierter 4-Methylenproline und Untersuchungen zur Metathese mit vinylischen Sulfoximinen
In the first part an enantio- and diastereselective synthesis of 3-substituted 4-methylene prolines was developed. (S)-N,S-dimethyl-S-phenylsulfoximine was tansformed via an addition, elimination, isomerization route (AEI-route) into the corresponding mixture of E and Z allylic sulfoximines. This …
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Asymmetrische Synthese ausgehend von allylischen Sulfoximinen: neuartige Gamma-Aminosäuren und cyclische Aminosulfoxonium Ylide
The most important inhibitory neurotransmitter in human brains, gamma-amino butyric acid (GABA), and the gastroprotective natural product AI-77-B are two prominent examples for gamma-amino acids. In the thesis here present a flexible stereoselective synthesis of alpha-hydroxy-gamma-amino acids was …
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Asymmetrische Synthese Delta 3a,4 -ungesättigter bicyclischer Prolin-Analoga und Festphasensynthese mit vinylischen Sulfoximinen
In the first part enantiomerically pure acyclic and cyclic allylic sulfoximines were transformed to the corresponding alpha-titanated compounds and reacted with N-tert-butylsulfonyl a-imino ethyl ester to give acyclic and monocyclic protected alpha-amino acid esters in yields of 32-97%. In all …
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Über die Entwicklung neuer Methoden zur N-Arylierung von Sulfoximinen und die Synthese von Diarylphosphinylsulfoximinen als Liganden in der asymmetrischen Metallkatalyse
In this work, new methods for the N-arylation of sulfoximines with various aryl sources have been developed. For the first time, aryl boronic acids can be used as aryl sources with ready available copper salts as catalysts. These cross coupling reactions can be performed under mild conditions at …
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New C 1- and C 2-symmetric sulfoximines : synthesis and application in enantioselective metal catalysis
In this dissertation, the preparation of new C1- and C2-symmetric sulfoximines (N,N- and P,N-ligands) for enantioselective metal catalysis is described. Guided by the excellent level of enantioselectivity observed using aminosulfoximine in the Cu-catalyzed Mukaiyama-aldol reaction, modifications of …