Used as an intermediate in the synthesis of pharmaceuticals, particularly in the production of protease inhibitors such as certain antiviral drugs. It serves as a chiral building block in asymmetric synthesis, enabling the construction of complex molecules with high stereochemical purity. Commonly employed in the development of HIV and HCV treatments due to its ability to mimic amino acid structures and enhance metabolic stability. Also utilized in research settings for the design of enzyme inhibitors and bioactive compounds.