Used as a chiral building block in the synthesis of pharmaceuticals, particularly in the development of protease inhibitors and other bioactive molecules. Its stereochemistry makes it valuable for constructing enantiomerically pure compounds, especially in the preparation of peptide mimetics and drug intermediates. Commonly employed in medicinal chemistry for structure-activity relationship studies due to the stability and ease of deprotection of the Boc group. Also utilized in solid-phase and solution-phase peptide synthesis where controlled stereochemistry is critical.