Abstract
The transition-metal-promoted CH activation has become an efficient as well as an atom-economic methodology for the synthesis of a wide array of organic molecules. Herein, the reaction of RuCl2(p-cymene)]2 with 1,3-dialkylbenzimidazolium salts (1a-c) in the presence of a small excess of cesium carbonate yields chelated η6-arene, η1-carbene ruthenium complexes (2a-c). All synthesized compounds were characterized by elemental analysis and NMR spectroscopy. The catalytic activity of [Cl2Ru(η6-arene, η1-carbene)] complexes (2a-c) were evaluated in the direct arylation of 2-phenylpyridine and 1-phenylpyrazole with (hetero)aryl chlorides derivative.
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