Used as a chiral building block in the synthesis of pharmaceuticals, particularly in the development of biologically active compounds where stereochemistry plays a critical role. Its alkyne functionality allows for further derivatization via click chemistry, making it valuable in medicinal chemistry for rapid compound assembly and library generation. Commonly employed in the preparation of protease inhibitors and neuroactive agents due to its structural compatibility with peptidomimetic frameworks. The tert-butyl carbamate (Boc) protection enables selective deprotection under mild acidic conditions, facilitating stepwise synthesis in complex molecule construction.