Used as a chiral building block in the synthesis of pharmaceuticals, particularly in the development of protease inhibitors and other bioactive molecules. Its protected amine and carboxylic acid functionalities make it suitable for peptide-like coupling reactions. The rigid tetrahydropyran scaffold helps enforce specific molecular conformations, enhancing stereoselectivity in drug design. Commonly employed in medicinal chemistry for constructing complex molecules with high enantiomeric purity.