Herein, we report a highly chemo- and regioselective vicinal trifunctionalization of aryl iodides by palladium/norbornene (Pd/NBE) catalysis. The key feature of this new method is the introduction of two distinct nitrogen and carbon electrophiles, with a large gap in reactivity, for ortho-unsubstituted aryl iodides via an intermolecular and intramolecular C―H functionalization, respectively. Eight types of ipso terminations can be coupled with both ortho-amination and ortho-alkylation, affording a variety of polysubstituted benzoheterocyclic scaffolds. Silicon-tethered substrates can lead to polyfucntional arenes via a single-step operation. Noteworthy, these products exhibit full-color-tunable strong fluorescence emissions with large Stokes shifts, and product 7r can serve as a fluorescent probe to specifically target lysosome in living cells.

中文翻译：

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钯/降冰片烯催化具有两种不同的氮和碳亲电试剂的芳基碘三官能化

在此，我们报告了通过钯/降冰片烯 (Pd/NBE) 催化对芳基碘化物进行高度化学和区域选择性的邻位三官能化。这种新方法的关键特征是引入了两个不同的氮和碳亲电子的，在反应性有很大的差距，对邻-未被取代的芳基碘经由分别的分子内和分子CA€•ħ官能化，。八种类型的本位终端可以与两个邻位-amination和邻烷基化，得到多种多取代的苯并杂环支架。硅系衬底可以通过以下方式产生多官能芳烃单步操作。值得注意的是，这些产品表现出具有大斯托克斯位移的全色可调强荧光发射，并且产品 7r 可以作为荧光探针来特异性靶向活细胞中的溶酶体。