Used as a chiral building block in the synthesis of pharmaceuticals, particularly in the development of protease inhibitors and other biologically active compounds. Its cyclopropane ring with defined stereochemistry allows for rigid structural control in drug design. The Boc-protected amine and ester functionalities enable stepwise deprotection and coupling reactions, making it valuable in peptide-like chain elongation and in the preparation of cyclic or constrained peptides. Commonly employed in medicinal chemistry for structure-activity relationship (SAR) studies due to its stereochemical purity and functional group compatibility.