Alkene-relayed C–H activation represents a novel strategy for functionalizing C–H bonds selectively. We developed a Pd-catalyzed annulation reaction of 2-iodobiphenyls with maleimides that act as a relay for C–H alkylation. The reaction features broad substrate scope and high efficiency, providing a straightforward method for the synthesis of succinimide-fused 9,10-dihydrophenanthrenes. The reaction using acenaphthylene as the relay has also been developed, which allows easy access to dibenzo[j,l]fluoranthenes.

中文翻译：

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使用芳基卤化物底物的 Pd 催化烯烃中继分子间 C-H 烷基化

烯烃中继的 C-H 活化代表了一种选择性地功能化 C-H 键的新策略。我们开发了 Pd 催化的 2-碘代联苯与马来酰亚胺的环化反应，作为 C-H 烷基化的中继。该反应具有广泛的底物范围和高效率，为合成琥珀酰亚胺稠合的 9,10-二氢菲提供了一种简单的方法。还开发了使用苊作为中继的反应，可以很容易地获得二苯并[ j , l ]荧蒽。