A facile and efficient approach has been developed for the synthesis of carbazoles from 2‐iodobiphenyls and diaziridinone under palladium catalysis. A wide range of carbazoles were synthesized in good to excellent yields, and indole derivatives were obtained by using styrenes as the substrate. The palladacycles obtained from 2‐iodobiphenyls acted as the key intermediate, and the reaction should proceed via a tandem Pd‐catalyzed C−H activation/dual C−N bond formation sequence.

中文翻译：

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钯催化的CH活化和二叠氮酮胺从2-碘代联苯合成咔唑

已经开发了一种简便有效的方法，可以在钯催化下从2-碘代联苯和二氮杂环丁酮合成咔唑。以良好至极好的产率合成了多种咔唑，并以苯乙烯为底物获得了吲哚衍生物。从2-碘联苯获得的palladacycles是关键中间体，反应应通过串联的Pd催化的CH活化/双CN键形成顺序进行。