Used as a key intermediate in the synthesis of complex carbohydrates and glycoconjugates, particularly in the preparation of oligosaccharides containing glucosamine units. Its protected functional groups allow selective deprotection and coupling reactions, making it valuable in pharmaceutical research for developing glycosidase inhibitors, antiviral agents, and vaccine candidates. The phthalimido group serves as a nitrogen-protecting moiety that can be removed to reveal an amino group for further derivatization. Commonly employed in solid-phase and solution-phase oligosaccharide assembly due to its stability and stereocontrol during glycosylation.