Used as a protected amino acid derivative in peptide synthesis, particularly in solid-phase peptide synthesis (SPPS) to ensure selective reactivity. It helps in the stepwise construction of peptides by protecting the lysine side chain with a Boc group, preventing unwanted reactions during synthesis. Commonly employed in the production of peptides for pharmaceutical research, drug development, and biochemical studies. Its stability and compatibility with various coupling reagents make it a valuable intermediate in the synthesis of complex peptides and proteins.