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Palladium Acetate/Trifluoroacetic Acid Catalytic System: Ligand Exchange and Catalytic Behaviour

Authors: Váňa Jiří

Year: 2017

Type of publication: ostatní - přednáška nebo poster

Page from-to: nestránkováno

Titles:

Language	Name	Abstract	Keywords
eng	Palladium Acetate/Trifluoroacetic Acid Catalytic System: Ligand Exchange and Catalytic Behaviour	One of the very common catalytic systems for C–H functionalization of aromatic compounds is based on combination of palladium(II) acetate and trifluoroacetic acid.1 The aim of our presentation is to show which species are formed in the catalytic mixture and describe their role in real reaction. The palladium(II) acetate is known to dominantly occurs in trimeric cyclic form. Influence of additional trifluoroacetic acid to its dichloromethane solution was in detail studied by NMR techniques. The analysis of spectra shows sequential exchange of the acetate ligands for trifluoroacetate ones while the trimeric cyclic motive remains preserved. Furthermore, with the knowledge of structure of the precatalytic system, the mechanism of C–H activation of acetanilides was studied in detail.2 We have shown that trinuclear species are involved in the reaction pathway.	Palladium Acetate, trifluoroacetic acid, catalysis