Used as a chiral building block in the synthesis of pharmaceuticals, particularly in the development of active pharmaceutical ingredients (APIs) requiring high enantiomeric purity. Its structure supports the creation of complex molecules with stereoselectivity, making it valuable in drug discovery for central nervous system agents and antiviral compounds. The trifluoromethyl group enhances metabolic stability and lipophilicity, improving drug bioavailability. Commonly employed in asymmetric synthesis and catalysis where the (S)-configuration is essential for biological activity.