 The article discusses the three main methods for introducing amines into aromatic systems through N-arrelation, namely palladium-catalyzed bookwald-Hartwig type reactions, copper-mediated ulmen type and chonlam type N-arrelation reactions. The article compares the advantages and disadvantages of each method in terms of reaction conditions, yield, and specific applications. This article was authored by Carolyn Fisher and Burkhard Koenig.