Used as a chiral building block in the synthesis of pharmaceuticals, particularly in the development of biologically active compounds where stereochemistry plays a critical role. Its protected amine and carboxylic acid functionalities make it ideal for peptide coupling and heterocycle formation in medicinal chemistry. Commonly employed in the preparation of protease inhibitors and kinase inhibitors due to its structural compatibility with enzyme binding sites. Also utilized in asymmetric synthesis to introduce the morpholine ring with defined stereochemistry, enhancing metabolic stability and solubility in drug candidates.