AbstractAryne insertions into the carbon‐iodine bond of heteroaryl iodides has been achieved for the first time. This novel reaction provides an efficient pathway for the synthesis of valuable building blocks 2‐iodoheterobiaryls from heteroaryl iodides and o‐silylaryl triflates in excellent regioselectivity. The copper(I) catalyst, which bears a N‐heterocyclic carbene (NHC) ligand, is essential to accomplish the reaction. Control reactions and DFT calculations indicate that the coordination of copper, as a Lewis acid, with nitrogen atoms of heteroaryl iodides mediates the insertion of arynes into heteroaryl carbon‐iodine bonds.
摘要 首次实现了在杂芳基碘化物的碳-碘键中插入丙烯。这一新型反应为从杂芳基碘化物和邻硅芳基三酸酯合成有价值的 2-iodoheterobiaryls 构建模块提供了一条高效途径,且具有极佳的区域选择性。铜(I)催化剂带有 N-杂环碳烯(NHC)配体,对完成反应至关重要。对照反应和 DFT 计算表明,作为路易斯酸的铜与杂芳基碘化物的氮原子配位介导了芳基插入杂芳基碳-碘键。