Abstract
The protected spacer-armed branched tri-N-acetyllactosamine has been synthesized as a building block for the synthesis of biantennary ABH blood group antigens. The key synthetic step is the simultaneous glycosylation of the 3′- and 6′-OH groups of an N-acetyllactosamine glycosyl acceptor by N-Troc-lactosamine trichloroacetimidate.
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