Used in peptide synthesis, particularly in the preparation of complex biomolecules where selective protection of functional groups is required. The Boc (tert-butoxycarbonyl) group provides temporary protection for the amino terminus, while the OcPent (a hydrophobic ester protecting group) protects the side-chain carboxyl group of aspartic acid. This dual protection allows for controlled stepwise assembly of peptides, especially in solid-phase synthesis. Its hydrophobic character aids in improving solubility in organic solvents and facilitates purification. Commonly applied in the development of pharmaceutical intermediates, enzyme inhibitors, and research compounds involving aspartic acid-containing sequences.