Used as a chiral building block in the synthesis of pharmaceuticals, particularly in the development of protease inhibitors and other biologically active molecules. Its structure supports the introduction of branched hydrophobic side chains, making it valuable in peptidomimetic design. Commonly employed in solid-phase and solution-phase peptide synthesis due to the presence of the Boc-protected amine and carboxylic acid functionality. Enables selective modifications in drug candidates targeting enzymes and receptors where stereochemistry plays a critical role in activity.