Ruthenium-Catalyzed Carbon−Carbon Bond Formation via the Cleavage of an Unreactive Aryl Carbon−Nitrogen Bond in Aniline Derivatives with Organoboronates
作者:Satoshi Ueno、Naoto Chatani、Fumitoshi Kakiuchi
DOI:10.1021/ja0713431
日期:2007.5.1
refluxing toluene gave the corresponding phenylation product in 83% yield via aryl carbon−nitrogen bondcleavage. This reaction involves two notable features: (1) the coupling proceeds via the oxidative addition of an aryl carbon−nitrogen bond in anilines to the ruthenium complex, and (2) C−C bondformation takes place via transmetalation between the Ru−NR2 species and organoboronates.
We report here ruthenium-catalyzedarylation of fluorinated aromatic ketones via ortho-selective carbon–fluorine bond cleavage. In the presence of trimethylvinylsilane and cesium fluoride, ortho carbon–fluoride bonds of aromatic ketones were phenylated by 5,5-dimethyl-2-phenyl-1,3,2-dioxaborinane using RuH2(CO)(PPh3)3 as a catalyst. Tandem C–F phenylation/C–H alkylation was observed for substrates