Used as a chiral intermediate in the synthesis of biologically active compounds, particularly in the development of pharmaceuticals where stereochemistry plays a critical role. Its structure allows for selective binding and improved pharmacokinetic properties in drug candidates. Commonly employed in asymmetric synthesis to introduce chirality, enhancing the efficacy and specificity of resulting therapeutic agents. Also utilized in the preparation of protease inhibitors and other enzyme-targeted drugs due to its stable conformation and hydrogen-bonding capability.