Used in peptide synthesis as a protected amino acid building block, particularly in the preparation of complex bioactive peptides. The Boc (tert-butoxycarbonyl) group provides temporary protection for the amino functionality, allowing selective coupling at the carboxylic acid site. The terminal alkene in the side chain enables further modification via ring-closing metathesis or other olefin-based reactions, making it valuable in the design of cyclic peptides and peptidomimetics. Commonly employed in medicinal chemistry for developing enzyme inhibitors and receptor ligands.