This compound is primarily used in peptide synthesis, particularly in solid-phase peptide synthesis (SPPS). It serves as a protecting group for amino acids, ensuring selective deprotection during the synthesis process. The Fmoc group protects the amino group, while the Dde group is used to protect side chains, allowing for orthogonal deprotection strategies. This enables the stepwise assembly of complex peptides with high precision. Its application is crucial in the development of therapeutic peptides, research peptides, and other biologically active compounds where controlled and selective synthesis is required.