Used as an intermediate in the synthesis of pharmaceutical compounds, particularly in the development of active pharmaceutical ingredients (APIs) where the Boc-protected morpholine ring serves to modulate solubility and bioavailability. Its carboxylic acid functionality allows for coupling reactions, enabling the construction of complex molecules in medicinal chemistry. Commonly employed in solid-phase and solution-phase peptide synthesis as a building block for drug discovery. Also utilized in the preparation of kinase inhibitors and other biologically active heterocycles. The Boc group provides temporary protection during multi-step syntheses, ensuring selective reactivity at other sites in the molecule.