Used as a key intermediate in the synthesis of pharmaceutical agents, particularly in the development of kinase inhibitors for cancer treatment. It serves as a building block in medicinal chemistry due to the reactive chloropyrimidine ring, enabling coupling reactions with amines or other nucleophiles to form biologically active molecules. Commonly employed in the preparation of antitumor and antiviral compounds, especially those targeting signaling pathways in oncology research. Its ester functionality allows for further derivatization, such as hydrolysis to the corresponding carboxylic acid or reduction to alcohol, expanding its utility in drug design. Also applied in agrochemical research for the development of novel pesticides with improved selectivity and efficacy.