Used as a key reagent in peptide synthesis, particularly for the protection of amino groups in chiral amino acids. Its structure enables high stereoselectivity and stability during coupling reactions. Commonly employed in solid-phase peptide synthesis (SPPS) to prevent racemization and improve yield. The sulfonamide moiety enhances solubility in polar solvents, facilitating cleaner reactions and easier purification. Also utilized in the preparation of peptide-based pharmaceuticals and bioconjugates due to its orthogonal protecting group properties, allowing selective deprotection in multi-step syntheses.