A dehydrogenative C(sp²)–N bond-forming strategy via copper-catalyzed intramolecular C–H/N–H coupling has been developed, which systematically unraveled the feasibility and practicality for benzoimdazo[1,2-a]indole formations through oxidative anilidic N–H activation. The merit of this strategy is illustrated by the broad tolerance of functionalities, as well as the utilization of extremely cheap copper catalysis to realize potentially useful indole-fused tetracycles in a step- and atom-economical manner.

中文翻译：

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铜催化的苯胺基N-H键的直接氧化活化形成脱氢C（sp ²）-N键：苯并咪唑并[1,2- a ]吲哚的合成

通过铜催化的分子内C–H / N–H偶联，形成脱氢C（sp ²）–N键形成策略，系统地揭示了苯并咪唑[1,2- a ]吲哚通过氧化形成的可行性和实用性。苯胺NH活化。功能广泛的耐受性说明了该策略的优点，并且利用极其廉价的铜催化以分步和原子经济的方式实现了潜在有用的吲哚稠合四环。