C(sp<sup>3</sup>)–F Bond Activation of CF<sub>3</sub>-Substituted Anilines with Catalytically Generated Silicon Cations: Spectroscopic Evidence for a Hydride-Bridged Ru–S Dimer in the Catalytic Cycle
作者:Timo Stahl、Hendrik F. T. Klare、Martin Oestreich
DOI:10.1021/ja311398j
日期:2013.1.30
Heterolytic splitting of the Si-H bond mediated by a Ru-S bond forms a sulfur-stabilized silicon cation that is sufficiently electrophilic to abstract fluoride from CF(3) groups attached to selected anilines. The ability of the Ru-H complex, generated in the cooperative activation step, to intramolecularly transfer its hydride to the intermediate carbenium ion (stabilized in the form of a cationic