Glucopyranose Glucosamine

Bognar, R, Herczegh, P, Whistler, R L, Madumelu, E B, 2-Acetamido-2-deoxy-5-thio-D--glucopyranose (5-thio-A-acetyl-D-glucosamine), Carbohydr. Res., 90, 138-143, 1981. 

The second family of A-linked oligosaccharides are called the lactosamine family in which the D-mannose residues of the core pentasaccharide are substituted 1 2 by lactosamine, which is a lactose analogue with A-acetyl-D-glucosamine substituted for D-glucopyranose at the reducing-end of lactose. The lactosamine is frequently substituted by A-acetyl-D-neu-raminic acid (for the structure of A-acetyl-D-neuraminic acid, see the monomer residue in colominic acid,0 Sect. 8.2 andO Fig. 7) linked 2 3 or 2 6 [142,143]. The third family has a mixed structure of the high mannose and lactosamine families [144,145,146,147]. 

A disadvantage of traditional acrylamide polymerization reactions is the heterogeneity of the products that result. A radical polymerization method that produces polymers of similar structure but that are much more homogeneous is atom-transfer radical polymerization (ATRP) [155,156]. ATRP has been used to synthesize carbohydrate-substituted polymers with low polydispersities [157,158,159,160,161]. Materials that display sugar residues such as glu-cofuranose [160], glucopyranose [161], and A-acetyl-D-glucosamines [159]. 

Final proof of the structure of D-glucosamine as 2-amino-D-glucopyranose (I) was furnished as indicated below independently by both chemical and x-ray methods. By the action of ammonia on 2,3-... 

Methylamino)-2-deoxy-a-7-glucopyranose A/-Methyl-a-7-glucosamine CgHggNOg 42862-96-9 193.198 glass sMeOH... 

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