AbstractExploration of elementary reactions in organometallic catalysis is an important method with which to discover new reactions. In this article, we report a gold(I)‐catalyzed iodo‐alkynylation of benzyne involving the merging of challenging migratory insertion and an oxidative addition process in gold catalytic cycle. A wide range of structurally diverse alkynyl iodides are good coupling partners in this iodo‐alkynylation transformation. Both aliphatic and aromatic alkynyl iodides can react with benzynes smoothly to afford highly functionalized 1,2‐disubstituted aromatics in moderate to good yields. Its good functional group compatibility and late‐stage application of complex molecules demonstrate its synthetic robustness. Studies of the mechanism reveals the feasibility of oxidative addition and the DFT calculations demonstrate the possible migratory insertion of benzyne into AuIII‐carbon bonds in the AuI/AuIII redox catalytic cycle, representing an important step towards an elementary reaction in gold chemistry research.
摘要 探索有机金属催化中的基本反应是发现新反应的重要方法。本文报告了一种金(I)催化的苄基碘炔化反应,涉及金催化循环中具有挑战性的迁移插入和氧化加成过程的合并。在这种碘-炔基转化过程中,多种结构不同的炔基碘化物都是很好的偶联剂。脂肪族和芳香族炔基碘化物都能与苄基化合物顺利发生反应,以中等至良好的收率得到高度官能化的 1,2-二取代芳烃。其良好的官能团兼容性和复杂分子的后期应用证明了它的合成稳定性。对其机理的研究揭示了氧化加成的可行性,而 DFT 计算则证明了在 AuI/AuIII 氧化还原催化循环中,苄基可能会迁移插入 AuIII 碳键,这代表着向金化学研究的基本反应迈出了重要的一步。