Used as a chiral building block in the synthesis of pharmaceutical intermediates, particularly in the development of bioactive molecules requiring stereochemical control. Its protected morpholine structure allows for selective functionalization, making it valuable in medicinal chemistry for constructing complex heterocyclic compounds. Commonly employed in asymmetric synthesis routes where the (S)-configuration is essential for biological activity. The tert-butyl and methyl ester groups facilitate stepwise deprotection and coupling reactions, enabling its incorporation into larger drug-like molecules.