Used as a key chiral building block in pharmaceutical synthesis, particularly in the development of protease inhibitors and antiviral agents. Its rigid oxetane ring enhances metabolic stability and improves pharmacokinetic properties in drug candidates. Commonly employed in the preparation of kinase inhibitors and central nervous system (CNS) active compounds due to its favorable polarity and ability to cross the blood-brain barrier. Also utilized in the design of novel antibiotics where stereochemistry and ring strain contribute to target selectivity.