Used as a key intermediate in the synthesis of antiviral and anticancer agents. Its structure supports the development of nucleoside analogs that interfere with viral replication or tumor cell proliferation. Commonly employed in medicinal chemistry for modifying pyrimidine-based compounds to enhance biological activity and selectivity. The alkyne functionality enables efficient incorporation into click chemistry reactions for creating hybrid compounds or molecular labeling in biomolecular research. Also utilized in research for designing new small-molecule therapeutics targeting RNA viruses and certain enzyme pathways involved in DNA synthesis.