2‐Vinylaniline in the synthesis of heterocycles: Recent advances

Abstract 2‐Vinylanilines are readily accessible substrates, which are undoubtedly one of the best candidates for the construction of diversely nitrogen‐containing heterocyclic compounds. Owing to the amine and alkenyl groups in their structures, these frameworks offer a facile, direct, and selective synthetic method. This review describes various cyclization reactions involving 2‐vinylanilines catalyzed by transition metals, or under metal‐free conditions.