Used as an intermediate in the synthesis of pharmaceutical compounds, particularly in the development of protease inhibitors and other biologically active molecules. Its structure contains functional groups that allow for peptide coupling and selective protection, making it valuable in solid-phase and solution-phase peptide synthesis. The cyano and carboxylic acid groups enable further chemical modifications, facilitating the creation of complex organic molecules for drug discovery research. Commonly employed in the preparation of beta-amino acids and constrained peptides due to its substituted phenyl and Boc-protected amine features.