Used in the synthesis of complex pharmaceuticals, particularly as a chiral building block in the development of protease inhibitors. Its protected functional groups allow selective deprotection and coupling in multi-step organic syntheses. Commonly employed in the preparation of antiviral agents, including drugs targeting hepatitis C and HIV, due to its ability to mimic peptide bonds and enhance metabolic stability. The silyl and Boc protecting groups provide compatibility with a wide range of reaction conditions, making it valuable in solid-phase and solution-phase peptide synthesis.