Used in peptide synthesis as a protected amino acid building block, particularly in the preparation of modified peptides with enhanced metabolic stability. The Boc (tert-butoxycarbonyl) group provides amine protection during solid-phase or solution-phase synthesis, while the cyano group can serve as a functional handle for further chemical modifications or as an electron-withdrawing group to influence reactivity. Its D-β-homophenylalanine backbone introduces structural rigidity and resistance to enzymatic degradation, making it valuable in the development of peptidomimetic drugs, especially for therapeutic targets requiring prolonged activity, such as in oncology or metabolic disorders. Commonly employed in research settings for structure-activity relationship (SAR) studies.