Iridium(III)-Catalyzed Direct Arylation of C–H Bonds with Diaryliodonium Salts
作者:Pan Gao、Wei Guo、Jingjing Xue、Yue Zhao、Yu Yuan、Yuanzhi Xia、Zhuangzhi Shi
DOI:10.1021/jacs.5b06758
日期:2015.9.30
arylation of complex compounds. Mechanistic studies by density functional theory calculations suggested that the sp(3) C-H activation was realized by a triflate-involved concerted metalation-deprotonation process, and the following oxidation of Ir(III) to Ir(V) is the most favorable when a bistriflimide is contained in the diaryliodonium salt. Calculations indicated that both steps are enabled by initial anion
Palladium-Catalyzed Oxygenation of Unactivated sp<sup>3</sup> C−H Bonds
作者:Lopa V. Desai、Kami L. Hull、Melanie S. Sanford
DOI:10.1021/ja046831c
日期:2004.8.1
This communication describes a new palladium-catalyzed method for the oxygenation of unactivated sp3 C-H bonds. A wide variety of alkane substrates containing readily available oxime and/or pyridine directing groups are oxidized with extremely high levels of chemo-, regio-, and in some cases diastereoselectivity. The substrate scope of these reactions is discussed, and the high selectivities are rationalized on the basis of the requirements of putative palladium alkyl intermediates.