Indoline is widely used in the synthesis of pharmaceuticals, particularly in the development of drugs targeting the central nervous system. It serves as a key intermediate in producing compounds with antidepressant, antipsychotic, and antihypertensive properties. Additionally, indoline derivatives are utilized in agrochemicals for creating pesticides and herbicides due to their biological activity. In material science, indoline-based dyes are employed in organic photovoltaics and dye-sensitized solar cells, enhancing light absorption and energy conversion efficiency. Its versatile structure also makes it valuable in organic synthesis for constructing complex heterocyclic compounds.