Used as a key intermediate in the synthesis of pharmaceutical compounds, particularly in the development of kinase inhibitors for cancer treatment. It serves as a building block in medicinal chemistry due to its indolinone scaffold, which is known for biological activity in cell signaling pathways. Commonly employed in the preparation of tyrosine kinase and cyclin-dependent kinase inhibitors. Also utilized in research settings for structure-activity relationship (SAR) studies to optimize drug candidates. Its bromo functionality allows for further derivatization via cross-coupling reactions such as Suzuki or Heck reactions, enabling rapid generation of compound libraries for drug discovery.