Palladium‐Catalyzed Direct Arylation of Heteroarenes with Aryl Mesylates

Abstract

Not so challenging after all! The first general examples of the direct arylation of heteroarenes by using challenging aryl mesylates as electrophiles are disclosed. These easy reaction conditions also allow the functionalization of other heterocycles, such as caffeine, triazole and benzathiazole (see scheme).