Used as a key chiral intermediate in the synthesis of pharmaceuticals, particularly in the development of antiviral and anticancer agents. Its rigid oxetane ring contributes to improved metabolic stability and bioavailability in drug molecules. Commonly employed in the preparation of β-amino acids and peptidomimetics, it helps enhance binding selectivity and resistance to enzymatic degradation. Also utilized in the design of protease inhibitors due to its structural similarity to natural amino acids while offering enhanced pharmacokinetic properties.