Reactions of [Cp*Ir(PPh3)Cl2] with various internal acyl­alkynes in the presence of NaBArF 4 resulted in the selective formation of iridacycles via vinylidene rearrangement. 13C-labeling experiments revealed that the acyl group selectively migrates to the other acetylenic carbon atom. This trend is the same as that in the vinylidene rearrangement of internal alkynes at a group 8 metal center.

中文翻译：

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内部炔烃中碳-碳键的活化：二取代炔烃在 Ir 配合物中的亚乙烯基重排

[Cp*Ir(PPh3)Cl2] 与各种内部炔烃在 NaBArF 4 存在下的反应导致通过亚乙烯基重排选择性地形成虹膜环。13C 标记实验表明酰基选择性地迁移到另一个炔属碳原子。这种趋势与内部炔烃在第 8 族金属中心的亚乙烯基重排中的趋势相同。