Used primarily in peptide synthesis as a protected amino acid building block. The Boc group provides temporary protection for the alpha-amino function, while the Aloc group on the side chain of the diaminopropionic acid moiety allows for orthogonal protection of the side amine. This dual protection strategy enables selective deprotection under mild conditions—Aloc can be removed selectively using palladium catalysts without affecting the Boc group, allowing stepwise assembly of complex peptides. Commonly employed in solid-phase and solution-phase synthesis of bioactive peptides, especially where selective side-chain functionalization is required. Its use supports the synthesis of peptide-based pharmaceuticals and research compounds with high purity and minimal side reactions.