Used in peptide synthesis as a protected dipeptide building block, particularly in the development of pharmaceuticals and bioactive peptides. The Boc (tert-butoxycarbonyl) group provides temporary protection of the amino terminus, allowing for controlled stepwise assembly of complex peptide sequences. Commonly employed in solid-phase and solution-phase synthesis where selective deprotection and coupling are required. Its D-phenylalanine configuration imparts metabolic stability and influences conformational structure, making it valuable in designing enzyme inhibitors and receptor ligands. Also utilized in research for developing peptidomimetics and structure-activity relationship (SAR) studies.