Construction of Indole‐Fused Heterocycles Starting from 2‐Thioxoindolines, Iminoindolines, and Their Derivatives

Abstract Indole‐based heterocycles containing sulfur or nitrogen atoms are important frameworks that occur widely in biological active natural products and drugs. Consequently, several novel chemical transformations and new catalytic strategies have been developed for the preparation of these skeletons in a highly efficient and selective manner. This review focuses on recent advancements in the construction of indole‐fused heterocyclic compounds by using iminoindolines, 3‐diazoindol‐2‐imines, 2‐thioxoindolines, and their derivatives as starting materials. magnified image