Used as a key chiral intermediate in the synthesis of antiviral drugs, particularly in the production of protease inhibitors for hepatitis C treatment. Its protected amine and defined stereochemistry make it valuable for constructing complex pharmaceutical molecules with high enantiomeric purity. Commonly employed in multi-step organic syntheses where selective functionalization and coupling reactions are required. Stable under various reaction conditions, allowing its use in peptide-like chain elongation and heterocycle formation.