Widely used as a glycosyl donor in carbohydrate chemistry, this compound plays a key role in the synthesis of complex oligosaccharides and glycoconjugates. Its protected functional groups allow selective deprotection and further chain elongation, making it valuable in the preparation of biologically active glycosides. The phthalimido group provides effective neighboring group participation, ensuring high β-selectivity during glycosylation reactions. It is commonly employed in the construction of N-linked glycans and in the development of glycosidase inhibitors. Additionally, it serves as an intermediate in the synthesis of glycosylated natural products and pharmaceutical agents where precise stereochemistry is critical.