Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of protease inhibitors and other biologically active compounds. Its protected amine group allows for selective reactions in multi-step organic syntheses, making it valuable in medicinal chemistry. Commonly employed in the preparation of HIV protease inhibitors and kinase inhibitors due to its structural compatibility with enzyme binding sites. Also utilized in solid-phase peptide synthesis and as a building block in combinatorial chemistry for drug discovery.