Indan-1,3-dione is a versatile building block in organic synthesis. This review focuses on the
applications of indan-1,3-dione to generate a large variety of indeno fused heterocycles such as Indeno-pyridine,
diindenopyridine, indenoquinoline and indeno-cyclopenta-pyridine, indenofuran, indeno-indoloquinones,
indenopyran, indenopyrimidine, indenotriazin-5-one, Indenoimidazole, indenopyrazoles and many others. Many of
these molecules exhibit promising biological activities.