Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of kinase inhibitors for cancer treatment. It serves as a building block in the preparation of active pharmaceutical ingredients (APIs) due to its reactive amine functionality, which allows for easy coupling with other molecular fragments. Commonly employed in medicinal chemistry for structure-activity relationship (SAR) studies, especially in optimizing drug candidates targeting inflammatory and oncological pathways. Its pyrimidine core enhances binding affinity to biological targets, making it valuable in the design of small molecule therapeutics.