Used as a chiral building block in the synthesis of pharmaceuticals, particularly in the development of protease inhibitors and other biologically active molecules. Its protected amine and ester functional groups allow for selective reactions in multi-step organic syntheses. Commonly employed in peptide chemistry to introduce branched-chain amino acid motifs with high stereochemical purity. The Boc-protected group enables easy deprotection under mild acidic conditions, making it compatible with a wide range of synthetic strategies in medicinal chemistry.