Used in pharmaceutical synthesis, particularly as an intermediate in the development of antiviral and anticancer agents. Its rigid oxetane ring enhances metabolic stability and bioavailability in drug candidates. Commonly employed in structure-activity relationship (SAR) studies to improve potency and solubility of active compounds. Also utilized in the preparation of covalent inhibitors due to the reactivity of the amine group, enabling conjugation with targeting moieties or labeling agents.