Used as a chiral building block in the synthesis of pharmaceuticals, particularly in the development of protease inhibitors and other bioactive molecules. Its tert-leucine backbone with N-methylamide group enhances metabolic stability and influences peptide conformation, making it valuable in medicinal chemistry for optimizing drug candidates. Commonly employed in asymmetric synthesis and catalysis due to its stereochemical purity. Also utilized in the design of peptidomimetics where resistance to enzymatic degradation is required.