A glycosyl trichloroacetimidate derivative (1) of the tetrasaccharide α-d-Galp-(1→ 3)-α-d- GlcpNAc-(1→ 3)-α-L-Rhap-(1→ 3)-α-L-Rhap was synthesized in a highly stereoselective, stepwise manner, using methyl 1-thioglycosides of L-rhamnose, 2-azido-2-deoxy-D-glucose and D-galactose, as major intermediates. The protecting group scenario in compound 1 permits regioselective deblocking at its “non-reducing end” unit. Therefore 1 is a suitable ...
