Used as a key intermediate in the synthesis of biologically active quinazoline derivatives, particularly in pharmaceutical research targeting kinase inhibitors. Plays a role in developing anticancer agents due to its ability to modify the quinazoline core for enhanced binding to tyrosine kinase receptors. Also utilized in the preparation of labeled compounds for use in radiopharmaceuticals and imaging studies, leveraging the iodine atom for radiolabeling with isotopes such as I-123 or I-131. Its structure supports further functionalization, making it valuable in medicinal chemistry for structure-activity relationship (SAR) studies.