This chemical, BOC-L-Lys(2-Cl-Z)-OH, is widely used in peptide synthesis as a protecting group for the amino acid lysine. The BOC (tert-butoxycarbonyl) group protects the α-amino group, while the 2-Cl-Z (2-chlorobenzyloxycarbonyl) group protects the ε-amino group on the lysine side chain. It helps prevent unwanted reactions during peptide bond formation, ensuring a more controlled and efficient synthesis process. Its application is particularly crucial in producing complex peptides and proteins for pharmaceutical research, where precise sequence assembly is required. Additionally, it is utilized in developing bioactive peptides with potential therapeutic applications for treating various diseases. The compound’s stability and compatibility with other reagents make it a valuable tool in organic and medicinal chemistry.