strategies effectively switch the C2/C3‐site selectivity in the heteroarylation of indoles and pyrroles with N‐heteroarenes by a palladium‐catalyzed twofold CH activation to form biheteroarenes and are further extended to the synthesis of complex fused tri‐ and tetracyclic heteroarenes by a tandem fourfold CH activation (see scheme).
交叉耦合:在“螯合定向控制”和“催化系统为基础的控制”策略有效地切换在
吲哚和
吡咯的杂芳基化的C2 / C3-部位选择性与Ñ -heteroarenes通过
钯催化的双重Ç ħ活化形成双杂
芳烃,并通过串联四倍的CH活化作用进一步扩展至合成稠合的
三环和四环杂
芳烃的合成(请参见方案)。