Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of kinase inhibitors and antiviral agents. Its structure allows for selective functionalization, making it valuable in medicinal chemistry for optimizing drug potency and metabolic stability. Commonly employed in the preparation of active pharmaceutical ingredients (APIs) where the pyrimidine core contributes to target binding, especially in oncology and antiviral research. Also utilized in agrochemicals for designing herbicides and fungicides due to its ability to modulate biological activity in plant pathogens.