Used as a key intermediate in the synthesis of pharmaceutical compounds, particularly in the development of kinase inhibitors and other biologically active molecules. Its structure allows for selective functionalization, making it valuable in medicinal chemistry for creating analogs in drug discovery programs. Commonly employed in research settings to build indoline-based scaffolds that exhibit potential antitumor, antiviral, or anti-inflammatory activity. Also utilized in the preparation of fluorescent probes and labeled compounds for biochemical assays due to its reactivity and stability under various coupling conditions.