Used in peptide synthesis as a protected amino acid building block, particularly in the development of pharmaceuticals and bioactive peptides. The Boc (tert-butoxycarbonyl) group provides temporary protection for the amine functionality, allowing selective coupling reactions. Its D-configuration and thiazole side chain make it valuable for designing metabolically stable peptides with enhanced biological activity, often explored in medicinal chemistry for enzyme inhibitors or receptor modulators. Commonly employed in solid-phase and solution-phase synthesis strategies.