Used as a chiral building block in the synthesis of pharmaceuticals, particularly in the development of protease inhibitors and other bioactive molecules. Its protected amine and carboxylic acid functionalities make it valuable in peptide-like structures where stereochemical control is critical. Commonly employed in medicinal chemistry for constructing constrained ring systems that mimic peptide bonds, enhancing metabolic stability and target selectivity. Also utilized in asymmetric synthesis and as an intermediate in the preparation of cyclic amino acid derivatives.