Used as a chiral building block in the synthesis of pharmaceuticals, particularly in the development of central nervous system agents and antidepressants. Its stereochemistry makes it valuable in creating enantiomerically pure drugs. Commonly employed in medicinal chemistry for structure-activity relationship studies due to its rigid, substituted morpholine structure. Also utilized in the preparation of kinase inhibitors and other bioactive molecules where a chiral phenyl-substituted heterocycle is required.