C-H bond functionalisation with [RuH(codyl)2]BF4 catalyst precursor

Wenbo Li (1) , Percia Beatrice Arockiam (1) , Cédric Fischmeister (1) , Christian Bruneau (1) , Pierre H. Dixneuf (1)

1 ISCR - Institut des Sciences Chimiques de Rennes

Direct catalytic diarylation with (hetero)arylhalides of arenes containing an heterocycle (pyridine, oxazoline, pyrazole) has been performed with a ruthenium catalyst assisted by a coordinating base. It constitutes a green process for cross-coupled C-C bond formation without any metal salt waste. The new catalytic system is based on [HRu(codyl)2]BF4/2KY (KY: KOAc, KOPiv, KPI (potassium phtalimide)] in which the assisting ligand Y promotes the initial cleavage of C-H bonds. It is shown that the efficiency of the Ru/2KY system strongly depends on the nature of both substrates.

Domaines: Catalyse

Wenbo Li, Percia Beatrice Arockiam, Cédric Fischmeister, Christian Bruneau, Pierre H. Dixneuf. C-H bond functionalisation with [RuH(codyl)2]BF4 catalyst precursor. Green Chemistry, 2011, 13, pp.2315-2319. ⟨10.1039/c1gc15642j⟩. ⟨hal-00631713⟩