d- erythro-2,3-Hexodiulosono-1,4-lactone 2-arylhydrazones ( 2) were prepared by condensation of dehydro- d- arabino-ascorbic acid with the desired arylhydrazine. Reaction of 2 with hydroxylamine gave the 2-arylhydrazone 3-oximes ( 3). On boiling with acetic anhydride, 3 gave 2-aryl-4-(2,3-di- O-acetyl- d- erythro-glycerol-1-yl)-1,2,3-triazole-5-carboxylic acid 5,1 1-lactone ( 5), whereas the unacetylated triazole derivatives were obtained upon reaction of 3 with bromine in water. On treatment of 5 with hydrazine hydrate, 2-aryl-4-( d- erythro-glycerol-1-yl)-1,2,3-triazole-5-carboxylic acid 5-hydrazides ( 6) were obtained. Acetylation of 6 gave the hexaacetyl derivatives. Similarly, treatment of 5 with liquid ammonia gave the triazolecarboxamides ( 12). Vigorous acetylation of 12 with boiling acetic anhydride gave tetraacetates, whereas acetylation with acetic anhydride-pyridine gave triacetates. Periodate oxidation of 6 gave the 2-aryl-4-formyl-1,2,3-triazole-5-carboxylic acid 5-hydrazides ( 8), and, on reduction, 8 gave the 2-aryl-4-(hydroxymethyl)-1,2,3-triazole-5-carboxylic acid 5-hydrazides, characterized as acetates. Similarly, periodate oxidation of 12 gave the triazolealdehyde ( 15), and reduction of 15 gave the hydroxymethyl derivatives ( 16). Acetylation of 16 gave the mono- and di-acetates, and, on reaction with o-phenylenediamine, 15 afforded the triazoleimidazole. Controlled reaction of 3 with sodium hydroxide, followed by neutralization, gave 3-( d- erythro-glycerol-1-yl)-4,5-isoxazolinedione 4-arylhydrazones. Reaction of 3 with HBr-HOAc gave 5- O-acetyl-6-bromo-6-deoxy- d- erythro-2,3-hexodiulosono-1,4-lactone 2-arylhydrazone 3-oximes ( 21). Compounds 21 were converted into 4-(2- O-acetyl-3-bromo-3-deoxy- d- erythro-glycerol-1-yl)-2-aryl-1,2,3-triazole-5-carboxylic acid 5,1 1-lactone on treatment with acetic anhydride.