Used as an intermediate in the synthesis of pharmaceuticals, particularly in the development of antihypertensive and antiviral agents. It serves as a building block in the preparation of quinazoline-based compounds that exhibit biological activity. Commonly employed in research settings for the design of kinase inhibitors and other targeted therapies. Its reactivity allows for selective substitution at multiple positions, making it valuable in medicinal chemistry for structure-activity relationship studies. Also utilized in the production of agrochemicals and dyes due to its stable aromatic framework and ease of functionalization.