Used as an intermediate in pharmaceutical synthesis, particularly in the development of active pharmaceutical ingredients (APIs) where protecting groups are required. The tert-butyl carbamate (Boc) group provides stability during multi-step reactions and can be selectively removed under mild acidic conditions, making it ideal for constructing complex molecules. The tetrahydrothiopyran ring offers a saturated heterocyclic scaffold that may enhance metabolic stability or influence conformation in drug candidates. Commonly applied in medicinal chemistry for optimizing potency and pharmacokinetic properties.