Used as a chiral building block in the synthesis of pharmaceuticals, particularly in the development of protease inhibitors and other bioactive molecules. Its hydroxyl and protected amino groups allow for selective functionalization, making it valuable in peptide mimetics and drug design. Commonly employed in organic synthesis to introduce stereochemically defined fragments. The Boc-protected amine ensures stability during reactions and can be deprotected under mild acidic conditions, enabling further coupling steps in multi-step syntheses.