AbstractA one‐pot diazotization/gold‐mediated cyclization of 2‐aminoaryl‐3‐arylpropargyl‐benzenesulfonamides is described. After diazotization, Me2SAuCl triggers an oxy‐ and/or chloroarylation of the alkyne moiety, resulting in the formation of 3‐acylindoles and/or Z‐3‐(chloromethylene)indolines. Density Functional Theory (DFT) calculations show the significant energetic preference of both processes over an insertion pathway. Notably, a Z‐3‐(chloromethylene)indoline crystallized with [Cl‐Au‐Cl],− exhibiting Au⋅⋅⋅H−C short contacts.
摘要 描述了 2-氨基芳基-3-芳基丙炔基苯磺酰胺的重氮化/金介导的单锅环化反应。重氮化后,Me2SAuCl 会引发炔基的氧和/或氯芳基化,从而形成 3-酰基吲哚和/或 Z-3-(氯亚甲基)吲哚啉。密度泛函理论(DFT)计算表明,与插入途径相比,这两种过程都具有显著的能量偏好。值得注意的是,一种 Z-3-(氯亚甲基)吲哚啉在[Cl-Au-Cl]结晶时显示出 Au⋅H-C 短接触。