Used as a key intermediate in the synthesis of epidermal growth factor receptor (EGFR) inhibitors, particularly in targeted cancer therapies. It plays a crucial role in the development of tyrosine kinase inhibitors (TKIs) that are designed to block signaling pathways involved in tumor growth and progression. Due to its structural features, it enables selective inhibition of mutant forms of EGFR, making it valuable in treating non-small cell lung cancer (NSCLC) and other EGFR-driven cancers. Its application is primarily in pharmaceutical research and development for oncology drugs.