Used primarily in peptide synthesis, this compound serves as a protected amino acid building block, enabling selective coupling in complex peptide sequences. The Boc (tert-butoxycarbonyl) group provides temporary protection of the amine functionality, allowing controlled stepwise assembly of peptides. Its N-methyl and D-allo-isoleucine configuration introduces structural constraints and metabolic stability, making it valuable in the development of bioactive peptides with enhanced pharmacokinetic properties. The dicyclohexylamine (DCHA) salt form improves crystallinity and handling during solid-phase or solution-phase synthesis. Commonly applied in pharmaceutical research, especially in the design of enzyme inhibitors and peptidomimetics.