Synthesis of the Trisaccharide α-l-Rha-(1-2)-α-l-Rha-(1-2)-α-L-Rha with a Dioxolane-Type Spacer-Arm1

Abstract
The trisaccharide α-L-Rha-(1-2)-α-L-Rha-(1-2)-α-L-Rha with a dioxolane-type spacer was obtained by using the trichloroacetimidate method in all of the glycosidation steps. After deprotection, the trisaccharide was coupled to BSA or KLH by reductive amination of the spacer aldehyde group.