Used in peptide synthesis as a protected form of serine, ensuring selective reactions at other sites of the peptide chain. It is particularly valuable in solid-phase peptide synthesis (SPPS) to prevent unwanted side reactions. The tert-butyl group provides stability during the synthesis process and can be easily removed under mild acidic conditions. This compound is essential in producing complex peptides for pharmaceutical research, including the development of therapeutic peptides and bioactive molecules. Its application is critical in maintaining the integrity and functionality of serine residues in peptide sequences.