Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of kinase inhibitors and antiviral agents. Its halogenated pyrimidine structure allows for selective cross-coupling reactions, making it valuable in medicinal chemistry for building complex drug molecules. Commonly employed in Suzuki and Buchwald–Hartwig reactions to introduce aryl or amino groups. Also utilized in agrochemical research for designing herbicides and fungicides due to its ability to modulate biological activity in target organisms.