A Pd(OAc)2 catalyst promotes the arylation of heteroarenes with 6-substituted 2-bromopyridines, via C–H bond activation, providing straightforward access to 2-(hetero)arylpyridines.
By an external hydrogen transfer-mediated activation mode, a new palladium-catalyzed α,β-coupling of different types of N-heteroarenes, enabling direct access to nitrogen bi-heteroarenes, has been demonstrated.