Heteroaromatic molecules bearing heteroaryl–heteroaryl bonds are an important class of building blocks found in a variety of areas; for example, optoelectronic materials,[1] liquid crystals,[2] biological compounds,[3] and ligands for asymmetric catalysis.[4] Over the past 35years, transitionmetal-catalyzed cross-coupling reactions have been chiefly responsible for making (hetero) aryl–(hetero) aryl bonds.[5] On the other hand, nucleophilic aromatic ...
