Abstract
Herein we describe the linear synthesis of a tetrasaccharyl sialoglycan found in both the Chol-1 ganglioside core and disialyl T antigen. The synthesis featured sialylation with a C5-ureido-modified sialyl donor followed by selective isolation of the desired α-sialoside via 1,5-lactamization. This methodology enables the linear synthesis of sialoglycans and provides practical access to biologically important carbohydrate molecules.
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