This microreview is devoted to the arylindazole C–H functionalization methodologies. The latest selected examples covering 2016–2020 period on the synthesis of indazolo-[2,3-a]quinolines and other heterocycles by transition metal catalyzed C–H activation reactions are summarized. In particular, novel transition metal catalytic systems and differently functionalized synthons utilized for the synthesis of indazolo[2,3-a]quinolines are mainly discussed in this review.

中文翻译：

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过渡金属催化的芳基吲唑的 C-H 官能化：高度官能化杂环的组装（微评）

这篇微观评论致力于芳基吲唑 C-H 功能化方法。总结了 2016-2020 年期间通过过渡金属催化的 C-H 活化反应合成吲唑-[2,3- a ]喹啉和其他杂环的最新实例。特别是，本综述主要讨论了用于合成吲唑并[2,3- a ]喹啉的新型过渡金属催化系统和不同功能化的合成子。