This chemical is primarily used in peptide synthesis, where it serves as a protected form of glutamine. The Boc (tert-butyloxycarbonyl) group protects the amino group, while the Xan (xanthyl) group protects the side chain amide of glutamine. This protection is crucial during the stepwise assembly of peptides, preventing unwanted reactions at these sites. It is particularly valuable in solid-phase peptide synthesis (SPPS), enabling the controlled addition of amino acids to build specific peptide sequences. Its application is common in the production of peptides for research, pharmaceuticals, and biotechnology, where precise and high-quality peptide synthesis is required.