Aryl–heteroaryl coupling via double C–H activation is a powerful transformation that avoids the installation of activating groups. A double C–H activation of privileged biological scaffolds, 2-coumarins and 2-pyrones, is reported. Despite the rich chemistry of these molecular frameworks, the yields are very good. Excellent regioselectivity was achieved on the pyrones. This methodology was applied to the synthesis
通过两次C–H活化进行的芳基–杂芳基偶联是一种有力的转化,可避免安装活化基团。据报道,特权
生物支架,2-
香豆素和2-
吡喃酮具有双重C–H活化作用。尽管这些分子框架
化学性质丰富,但收率还是很高的。在
吡喃酮上获得了极好的区域选择性。该方法可通过三个步骤应用于
氟美阿帕林C的合成。进行了同位素效应实验,并提出了机理。