Synthesis of Phenanthrone Derivatives from <i>sec-</i>Alkyl Aryl Ketones and Aryl Halides via a Palladium-Catalyzed Dual C−H Bond Activation and Enolate Cyclization
作者:Parthasarathy Gandeepan、Kanniyappan Parthasarathy、Chien-Hong Cheng
DOI:10.1021/ja1026248
日期:2010.6.30
A palladium-catalyzed chelation-assisted C-H activation of alkyl aryl ketones and their reaction with aryl iodides to afford ortho-arylated products is described. For sec-alkyl aryl ketones, the catalytic reaction proceeds further to give 10,10-dialkylphenanthrone derivatives. A possible reaction mechanism involving directed dual C-H bond activation and enolate cyclization for the formation of 10,10-dialkylphenanthrone derivatives is proposed.