Abstract
6- O-Acetyl-2,4-diazido-3- O-benzyl-2,4-dideoxy-β- D-glucopyranosyl chloride and 2,6-diazido-3,4-di- O-benzyl-2,6-dideoxy-β- D-glucopyranosyl chloride are two valuable building units suitable for the synthesis of α-linked disaccharides containing 2,4-diamino-2,4-dideoxy- or 2,6-diamino-2,6-dideoxy- D-glucose as nonreducing moieties. The glycoside synthesis is accomplished stereoselectively under mild conditions in the presence of silver perchlorate. The α-(1→3)-linked disaccharides 2,4-diacetamido-2,4-dideoxy-3- O-(2,4-diacetamido-2,4-dideoxy-α- D-glucopyranosyl)- D-glucopyranose and 2-acetamido-2-deoxy-3- O-(2,6-diacetamido-2,6-dideoxy-α- D-glucopyranosyl)- D-glucopyranose have been prepared.
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