Cellobiose 2-deoxy

Spirochaeta Cellobiose, 2-deoxy-D-glucose, D-frutrtose, D-fucose, Oxygen at high concentrations ... 

A marked difference in the product pattern has been reported for the treatment of cellobiose with either NaOH or NaHCOs. The formation of 3-deoxy-2-0-(hydroxymethyl)pentonic acids (52) from cellobiose is less important in sodium hydrogencarbonate solution than in sodium hydroxide, while the relative amounts of 2-deoxytetronic, 3-deoxypentonic, and 3,4-dideoxypentonic acids are much larger. 

B. W. Sigurdskjold, B. Duus, and K. Bock, Hydrolysis of substrate analogues catalysed by P-D-glucosidase from Aspergillus niger. Part II Deoxy and deoxyhalo derivatives of cellobiose, Acta Chem. Scand., 45 (1991) 1032-1041. 

Also prepared during this work were the previously unknown deoxy fluoro cellobioses 28 and 29. 

Other epimerases in this class are cellobiose 2-epimerase141a and, probably, UDP-2-acetamido-2-deoxy-D-glucose 2-epimerase (which gives141b 2-acetamido-2-deoxy-D-mannose and UDP), because both enzymes incorporate tritium from water-t onto C-2 of the products. 

Of the oligosaccharides examined for their capacity to inhibit WGA, only those containing 2-acetamido-2-deoxy-D-glucose residues proved effective. Lactose, cellobiose, cellotriose, and N-acetyllactosamine (2-acetamido-2-deoxy-4-0-/3-D-galactopyranosyl-D-glucose) were all inactive as inhibitors of the p-azophenyl 2-acetamido-2-deoxy-)8-D-glucopyranoside-bovine serum albumin-WGA reaction.498 Table IX presents representative inhibition data. 

An interesting observation, not commented on in mechanistic arguments, is that the acetolysis of methyl 2,3,4,6-tetra-0-acetyl-j8-D-glucopyranoside is slower than that of methyl 2,3,4-tri-0-acetyl-6-deoxy-jS-D-glucopyranoside. A similar result has been observed in the cellobiose series. ... 

These crystal-structure analyses are concerned with the following molecules o-D-glucopyranose monohydrate/ D-xylopyranose/ methyl yS-D-xylopyranoside, di-jS-n-fructopyranose-strontium chloride trihydrate, cellobiose (independent determination), D-glucaric acid, D-galactonic acid, methyl a-D-lyxofuranoside, /3-D-lyxopyranose, methyl 3,4,6-tri-0 - acetyl - 2 - (chloromercuri) - 2 - deoxy - j3 - d - glucopyranoside, D-glu-copyranosyl (potassium sodium phosphate) tetrahydrate," and methyl 6-bromo-6-deoxy-a-D-galactopyranoside. ... 

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