Used as a chiral building block in the synthesis of pharmaceuticals, particularly in the development of active pharmaceutical ingredients (APIs) where stereochemistry plays a critical role. Its protected amine group allows for selective reactions in multi-step organic syntheses. Commonly employed in the preparation of bioactive molecules, including protease inhibitors and central nervous system agents. The tert-butyl carbamate (Boc) group provides stability under various reaction conditions and can be easily removed under mild acidic conditions, making it ideal for use in peptide chemistry and medicinal chemistry research.