Used as a chiral building block in the synthesis of biologically active compounds, particularly in pharmaceutical research. Its structure supports the development of enzyme inhibitors and receptor modulators due to the presence of a rigid morpholine core and a phenyl group that enhances binding selectivity. Commonly employed in asymmetric synthesis to introduce stereochemical control in drug candidates targeting central nervous system disorders and inflammatory diseases. Also utilized in the preparation of protease inhibitors and kinase inhibitors owing to its favorable conformational stability and hydrogen bonding capability.