An iridium‐catalyzed oxidative [4+2] annulation reaction of 2‐arylindoles using quinone derivatives as C2 synthons has been developed. From this reaction, a series of diversely substituted indolo[1,2‐f ]phenanthridine derivatives were synthesized in an efficient manner. Moreover, diverse transformations of the phenanthridine derivatives thus obtained have also been performed, which showcase the synthetic potential of the present protocol.

中文翻译：

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铱催化的2-Arylindoles苯并醌导致吲哚[1,2-f]菲啶-6-醇的氧化态

已经开发了使用醌衍生物作为C2合成子的2-芳基吲哚的铱催化的[4 + 2]氧化环化反应。通过该反应，可以有效地合成一系列不同取代的吲哚[1,2- f ]菲啶衍生物。此外，还进行了由此获得的菲啶衍生物的各种转化，这证明了本方案的合成潜力。