Used as an intermediate in the synthesis of biologically active compounds, particularly in pharmaceuticals targeting kinase inhibitors. It plays a key role in the preparation of indolinone-based structures, which are found in anticancer and anti-inflammatory agents. Commonly utilized in medicinal chemistry for structure-activity relationship (SAR) studies due to its ability to modify core scaffolds in drug candidates. Also employed in the development of targeted therapies, especially in oncology research involving tyrosine kinase pathways.