Used as a key intermediate in organic synthesis, particularly in the preparation of complex molecules through click chemistry. Its alkyne functionality enables efficient copper-catalyzed azide-alkyne cycloaddition (CuAAC) reactions, making it valuable in pharmaceutical research and development of bioactive compounds. The tert-butyl ester group provides stability and can be easily deprotected under mild acidic conditions, allowing for selective modification in multi-step syntheses. Commonly employed in the construction of peptidomimetics, agrochemicals, and functionalized polymers.