Used in peptide synthesis as a protected form of lysine, ensuring selective reactions during the construction of complex peptides. It is particularly valuable in pharmaceutical research for developing peptide-based drugs, where precise amino acid modification is critical. The 2-chlorobenzyloxycarbonyl (2-Cl-Z) protecting group shields the amino group, preventing unwanted side reactions. This compound is also employed in biochemistry studies to investigate protein interactions and functions by incorporating modified lysine residues into peptides or proteins. Its stability and compatibility with various synthesis protocols make it a reliable choice in organic and medicinal chemistry.