Copper-catalyzed direct amination of halo(hetero)arenes with sodium azide as the amino source

In the synthesis of primary (hetero)aryl amines through copper-catalysis, the ammonia surrogates or aqueous ammonia nucleophilic partners can be replaced by sodium azide. Recent efforts in copper-mediated transformation of (hetero)aryl halides to (hetero) aryl amines using azide anion as the amino source are discussed in these highlights.