In this Letter, we describe a simple, practical approach in which cheap CuI was used as a catalyst to introduce a gem-difluoro olefin onto simple electron-rich aniline derivatives in good yield via direct C–H functionalization and a subsequent HF elimination reaction. Detailed mechanistic studies point at a dual role of aniline derivatives in this reaction, which serve as a substrate and a basic promoter to trigger the HF elimination step.

中文翻译：

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通过CH功能化和苯胺的双重作用获得宝石二氟烯烃。

在这封信中，我们描述了一种简单，实用的方法，其中廉价的CuI用作催化剂，通过直接的C–H官能化和随后的HF消除反应，以良好的产率将宝石-二氟烯烃引入简单的富电子苯胺衍生物中。详细的机理研究指出，苯胺衍生物在该反应中起着双重作用，它们充当底物和触发HF消除步骤的基本启动子。