Used in the synthesis of pharmaceutical intermediates, particularly in the development of protease inhibitors such as those for hepatitis C virus (HCV). Its chiral center and naphthyl group make it valuable for constructing stereoselective drug molecules. The Boc-protected amine allows for controlled deprotection and coupling in peptide-like chains, enabling precise assembly of complex bioactive compounds. Commonly employed in medicinal chemistry for structure-activity relationship (SAR) studies due to its rigid aromatic moiety and functional handles for further derivatization.