Boc-D-Dab(Z)-OH.DCHA is a protected derivative of D-diaminobutyric acid (D-Dab), serving as a key building block in peptide synthesis. The Boc (tert-butoxycarbonyl) group protects the α-amino group, while the Z (benzyloxycarbonyl) group safeguards the side-chain γ-amino group. Formulated as the dicyclohexylamine (DCHA) salt for improved handling and solubility, it enables the selective incorporation of D-Dab residues into peptide chains during solid-phase synthesis. This compound is essential for constructing complex peptides, proteins, and peptide-based pharmaceuticals, where stereochemical control and side-chain protection are crucial to prevent unwanted reactions and ensure high purity. It is widely applied in medicinal chemistry research for developing bioactive molecules, enzyme inhibitors, and therapeutic agents with enhanced stability and specificity.