Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 3 of 3 for “"Triazoliumsalze"”.
-
Neue chirale Triazoliumsalze in der Carben-katalysierten intramolekularen gekreuzten Benzoin-Reaktion
In nature many metal free catalytic reactions are accomplished in enzymes. The broad facilities of organocatalysis as a selective and environment-friendly synthetic method has only been recognized recently by chemists. This thesis deals with the synthesis of novel chiral polycylic triazolim salts …
-
Bicyclische Triazoliumsalze als Präkatalysatoren in der asymmetrischen Benzoin- und Acyloinkondensation und asymmetrische Synthese von Oxazolidin-2-onen
In this work the synthesis of a novel enantiopure bicyclic triazolium salt and its application as an efficient chiral catalyst in the form of the corresponding Wanzlick carbene in the asymmetric variant of the benzoin condensation is described. The chiral bicyclic triazolium salt is currently the …
-
Carbene catalyzed asymmetric nucleophilic acylations with novel triazolium salts
We have developed a practical and efficient synthesis of a family of new chiral trazolium salts from (S)-glutamic acid. With access to the new precarbene catalysts we started to verify their ability to promote the benzoin condensation and intramolecular Stetter reaction. The optimal conditions were …