Used in organic synthesis as a chiral building block for pharmaceuticals. Its rigid cyclobutane structure and defined stereochemistry make it valuable for developing bioactive molecules, particularly in the design of enzyme inhibitors and receptor ligands. Commonly employed in medicinal chemistry for structure-activity relationship (SAR) studies due to its conformational constraints. Also utilized in asymmetric synthesis as a chiral amine auxiliary or catalyst precursor. The hydrochloride salt form enhances stability and solubility in aqueous reaction systems.