3-Benzyloxycarbonylamino-4,4-dimethylpentanoic acid is primarily used in organic synthesis, particularly in peptide chemistry. It serves as a protected amino acid derivative, where the benzyloxycarbonyl (Cbz) group acts as a protecting group for the amino functionality during peptide bond formation. This compound is valuable in the stepwise construction of peptides, ensuring that specific amino acids are selectively reacted without interference from other reactive sites. Additionally, it finds application in the development of pharmaceuticals and bioactive molecules, where precise control over amino acid reactivity is crucial. Its stability and ease of deprotection make it a useful intermediate in the synthesis of complex organic molecules.