This compound is the D-enantiomer of protected lysine, primarily used in peptide synthesis. The Boc (tert-butyloxycarbonyl) group protects the α-amino group, while the Tfa (trifluoroacetyl) group protects the side chain ε-amine of D-lysine, preventing unwanted reactions during peptide bond formation. It is particularly useful in solid-phase peptide synthesis (SPPS) where selective deprotection and coupling steps are essential. The compound ensures the D-lysine residue is incorporated correctly into the peptide sequence without side reactions. After synthesis, the protecting groups can be removed under specific conditions to yield the desired peptide. Its application is crucial in producing peptides for pharmaceutical research, drug development, and biochemical studies.