N'-tert-Butyl-D-ornithine is a non-proteinogenic amino acid derivative, specifically a D-enantiomer of ornithine modified with a tert-butyl group on one of its amino functionalities. Its CAS number is 184576-63-4. This compound features a chiral center and multiple functional groups, making it a valuable chiral building block. This derivative is primarily utilized in peptide chemistry and medicinal chemistry research. It serves as a key intermediate in the synthesis of more complex peptides and peptidomimetics, where the tert-butyl group acts as a protecting group for the amino function. Its D-configuration is particularly important for creating peptides resistant to enzymatic degradation, which is a common strategy in the development of therapeutic agents and biochemical probes. As a protected form of D-ornithine, it finds application in the synthesis of compounds for biological studies. The product is handled as a research chemical, and standard safety protocols for handling amino acids and organic amines should be followed.