Used as a chiral building block in the synthesis of pharmaceuticals, particularly in the development of active pharmaceutical ingredients (APIs) requiring high enantiomeric purity. Its protected amine group allows for selective reactions in multi-step organic syntheses. Commonly employed in the preparation of protease inhibitors and other bioactive molecules where stereochemistry plays a critical role in biological activity. The Boc-protected amine ensures stability during reactions and can be easily deprotected under mild acidic conditions, making it ideal for solid-phase and solution-phase peptide-like synthesis. Widely utilized in medicinal chemistry for drug discovery and optimization.