Used as a protecting group reagent in organic synthesis, particularly in peptide and nucleotide synthesis. The aminooxy group reacts selectively with carbonyl compounds to form stable oximes, enabling chemoselective ligation in bioconjugation applications. Commonly employed in the preparation of protected aminoxy derivatives for use in solid-phase synthesis and labeling of aldehydes or ketones in biomolecules. Its tert-butoxycarbonyl (Boc) group allows for easy deprotection under mild acidic conditions, making it valuable in multi-step synthetic strategies where orthogonal protection is required.