terminal alkynes under mild conditions, namely in the presence of cuprous iodide (10 mol%) and a base in ethanol or 1,4‐dioxane. Further investigation reveals that palladium contaminants as low as 100 ppb are responsible for these successful couplings. It is worth noting that simple aliphatic substituted terminal alkynes could be tolerated to smoothly produce indole and benzo[b]furan derivatives.
在温和的条件下,即在
碘化亚铜(10摩尔%)和
乙醇碱存在下,通过
2-碘苯胺衍
生物和2-
碘酚与末端
炔烃的反应,可以高产率获得
吲哚和苯并[ b ]
呋喃。或1,4-
二恶烷。进一步的研究表明,低至100 ppb的
钯污染物是这些成功偶联的原因。值得注意的是,可以容忍简单的脂族取代的末端
炔烃,以平稳地生产
吲哚和苯并[ b ]
呋喃衍
生物。