Used as a key intermediate in the synthesis of pharmaceutical compounds, particularly in the development of kinase inhibitors for cancer treatment. Its structure allows for selective modification in drug design, enhancing binding affinity to target proteins. Commonly employed in cross-coupling reactions due to the ethynyl group, enabling the formation of complex heterocyclic systems in medicinal chemistry. Also utilized in research settings for labeling and bioconjugation applications owing to its reactivity with azide-functionalized molecules via click chemistry.