Used as a chiral building block in the synthesis of pharmaceuticals, particularly in the development of protease inhibitors and other biologically active molecules. Its enantiomerically pure structure makes it valuable for asymmetric synthesis, where stereochemistry is critical for drug efficacy. Commonly employed in the preparation of intermediates for antiviral and anticancer agents. The tert-butyl and methyl ester groups provide favorable solubility and protection during multi-step syntheses, allowing selective deprotection and further functionalization.