Used primarily as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of kinase inhibitors and antiviral agents. Its structure allows for selective functionalization, making it valuable in medicinal chemistry for constructing complex heterocyclic systems. It is also employed in research settings to develop novel bioactive compounds, especially those targeting inflammatory and oncological pathways. Due to its reactivity, it serves as a building block in multistep organic syntheses, facilitating the introduction of halogenated indoline motifs in drug candidates.