Used in solid-phase peptide synthesis as a chiral building block for introducing a long alkyl chain with a terminal alkene functionality into peptide structures. The Fmoc group allows for orthogonal protection in stepwise synthesis, enabling the construction of modified peptides for studies in membrane interaction, lipidation effects, or as intermediates in click chemistry via the terminal alkene. Commonly applied in the development of bioactive peptide analogs, lipidated peptides, or peptide-polymer conjugates for pharmaceutical and biochemical research.