3-0- 3-D-galactopyranosyl

CN 4-0-(3-D-galactopyranosyl-D-gluconic acid compd. with erythromycin (1 1)... 

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. 

D-Galactopyranosyl-D-ara6ino-hexulosonic acid ( 2-ketolactobi-onic acid ) was obtained by oxidizing lactosone with bromine, and the product was isolated as the mixed barium salt-barium bromide complex [(C,2H,90i2)2Ba-BaBr2-4 HaO]. ... 

Bayne observed that lactosazone is readily converted into anhydro-lactosazone in hot alcohol, and he recommended extraction with hot water for purification of the osazone. The water-insoluble anhydrolactosazone was identified as 3,6-anhydro-4-0-/3-D-galactopyranosyl-D-rf6o-hexose phenylosazone (39 R = D-galactopyranosyl) by conversion with aqueous copper sulfate to its phenylosotriazole, which was then hydrolyzed to give D-galactose and the phenylosotriazole of 3,6-anhydro-D-rf6o-hexose. 

Anhydro-4-0-(/3-D-galactopyranosyl)-D-glucitol (48) was prepared by the catalytic, reductive desulfurization of 2-naphthyl l-thio-/3-lactoside. ... 

Anhydro-4-0-(/3-D-galactopyranosyl)-/3-D-glucose (49) has been made by two methods, both of which involve the base-catalyzed elimination of an electrophilic group from C-1, namely, by the action of barium hydroxide on A-(hepta-0-acetyl- -lactosyl)-tri-iV-methylammonium iodide or of 2.6 N potassium hydroxide on phenyl /3-lactoside at 100°. 

Deacetylation with sodium methoxide, followed by reaction with phenyl-hydrazine, gave a mixture of three osazones, presumably n-Z /xo-hexose phenylosazone, 1,5-anhydro-D-er /[Pg.201]

In the class of the ceramide dihexosides, two types have been isolated a ceramide in glycosidic conjugation with (a) an O-D-galacto-pyranosyl-(l — 4)-/3-D-galactopyranosyl group,85 and (b) a 4-0-/3-D-galactopyranosyl-j8-D-glucopyranosyl residue.88... 

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