Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of protease inhibitors and other bioactive molecules. Its alkyne functionality allows for use in click chemistry reactions, enabling efficient coupling in drug discovery and bioconjugation. The tert-butyl ester group provides stability during synthetic transformations and can be selectively deprotected under mild acidic conditions, making it valuable in multi-step organic synthesis. Also employed in the preparation of agrochemicals and specialty polymers due to its reactivity and structural features.