Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of kinase inhibitors for cancer treatment. Its structure allows for selective modification, making it valuable in creating compounds that target specific signaling pathways in tumor cells. Also employed in agrochemical research for designing herbicides and pesticides due to its ability to enhance bioactivity in active ingredients. Commonly utilized in medicinal chemistry for building quinazoline-based drug candidates with improved potency and metabolic stability.