Used as a key intermediate in the synthesis of tyrosine kinase inhibitors, particularly in anticancer drug development. Shows potential in targeting epidermal growth factor receptor (EGFR) pathways, making it valuable in research for lung, breast, and other solid tumor therapies. Its structure supports enhanced binding affinity and selectivity for mutant forms of EGFR, improving efficacy in resistant cancer strains. Also employed in structure-activity relationship (SAR) studies to optimize pharmacokinetic properties of quinazoline-based drugs.