Used in peptide synthesis as a chiral building block for the preparation of enantiomerically pure compounds. Its structure allows for selective coupling reactions, making it valuable in the development of pharmaceutical intermediates, particularly in the synthesis of protease inhibitors and other bioactive molecules. The presence of the cyano group enables further functionalization, while the Fmoc group provides orthogonal protection for amine functionalities during solid-phase peptide synthesis. Commonly employed in research settings for constructing complex organic molecules requiring stereochemical control.