Alumina‐mediated CF activation (AmCFA) is an established method to generate incipient phenyl cation (IPC) through polarization of C(aryl)F bonds. Herein, it is reported that AmCFA can be used to induce intramolecular arylation of aryl alkynes containing one, two, and three triple bonds. During the reaction, a single formally eliminated hydrogen fluoride (HF) leads to the formation of two, three, and four CC bonds, respectively. Thus, the transformation gives rapid access to π‐extension and serves as an interesting example of solid‐state rational domino annulation enabling the bottom‐up construction of nanographenes.

中文翻译：

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氧化铝介导的C ？引起芳基炔烃的级联 F键激活

氧化铝-体介导C  ˚F活化（AmCFA）是生成通过C（芳基）的极化初始苯基阳离子（IPC）已建立的方法 F键。在此，据报道，AmCFA可用于诱导包含1、2和3个三键的芳基炔烃的分子内芳基化。在反应过程中，一个正式消除的氟化氢（HF）分别导致形成两个，三个和四个CC键。因此，该变换可快速访问π延伸，并成为固态有理多米诺环化的有趣示例，可实现纳米级石墨烯的自底向上构造。