Palladium‐Catalyzed Regioselective C4 Functionalization of Indoles with Quinones

Abstract A synthetic strategy for the installation of diversely functionalized quinones at the C4 position of indoles is developed via palladium‐catalyzed C−H and double C−H functionalization. This synthetic protocol provides a rapid route to a variety of 4‐quinonylindoles via the direct coupling of 3‐formylindoles with quinones. Furthermore, this synthetic methodology also efficiently affords biologically interesting bis(indol‐4‐yl)quinones in good yields by direct one‐pot double C−H activation of 3‐formylindoles with the corresponding quinones. magnified image