Z-D-Lys(Boc)-OSu is a protected, amino acid derivative of D-Lysine in which the α-amino group is protected with a benzyloxycarbonyl (Z/Cbz) group and the ε-amino side chain is protected as a Boc carbamate, while the carboxyl group is converted to an N-hydroxysuccinimide (OSu) ester. The molecule contains both carbamate-protected amines and a reactive OSu ester functional group at the carboxylate position, with the stereochemistry indicated as D and the lysine backbone bearing the characteristic (CH2)4 ε-amino side chain. Z-D-Lys(Boc)-OSu is used as an activated amino acid building block for coupling reactions in peptide and amide bond formation workflows and for preparing labeled or conjugated lysine-containing derivatives under conditions compatible with the Z and Boc protecting groups.
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