Ir(<scp>iii</scp>)-catalyzed quadruple C–H activation of <i>N</i>-arylimidazolium and diaryliodonium salts: facile access to polysubstituted imidazo[1,2-<i>f</i>]phenanthridiniums
作者:Zheng Liu、Qian Li、Chengyong Yang、Xuesong Zheng、Di Wu、Ge Gao、Jingbo Lan
DOI:10.1039/d2cc01646j
日期:——
of three kinds of different C–H activations with high catalytic efficiency, which allows ortho-unhindered N-arylimidazoliums to undergo a diarylation/annulation reaction, affording a variety of polysubstituted imidazo[1,2-f]phenanthridiniums. Neutral imidazo[1,2-f]phenanthridines are also prepared via a demethylation reaction of imidazo[1,2-f]phenanthridiniums.
在此,N-杂环卡宾定向的Ir( III )催化级联C-H芳基化/ N-芳基咪唑与二芳基碘鎓盐的环化首次通过四重C-H活化策略构建咪唑[1,2 - f ]菲啶鎓结构。该方案克服了三种不同 C-H 活化的相容性,具有高催化效率,允许邻位不受阻碍的N-芳基咪唑鎓进行二芳基化/环化反应,得到多种多取代的咪唑并[1,2- f ]菲啶鎓。中性咪唑并[1,2- f ]菲啶也可通过以下方法制备咪唑并[1,2- f ]菲啶鎓的去甲基化反应。