Used in peptide synthesis as a chiral building block for introducing a sterically hindered, brominated aromatic amino acid residue. The Fmoc group allows for solid-phase synthesis using standard Fmoc/t-Bu strategies. The bromine atom serves as a handle for further modification via cross-coupling reactions such as Suzuki or Heck couplings, enabling the construction of complex, functionalized peptides for drug discovery and chemical biology. Its (R)-configuration ensures stereochemical control in the design of conformationally constrained peptides. Commonly applied in the development of enzyme inhibitors and bioactive probes where aromatic side chains influence binding and stability.