Used as a chiral building block in the synthesis of pharmaceuticals, particularly in the development of enzyme inhibitors and central nervous system agents. Its fluorinated pyrrolidine structure enhances metabolic stability and bioavailability in drug candidates. Commonly employed in the preparation of antiviral and antidiabetic compounds due to its ability to mimic transition states in enzymatic reactions. Also utilized in the design of selective receptor modulators where stereochemistry and fluorine substitution play critical roles in activity and selectivity.