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Showing papers on "Aldose published in 1973"


Journal ArticleDOI
TL;DR: In this article, it was shown that the tritium isotope effect of intramolecular hydrogen transfer occurs, during the conversion from C-2 of D-glucose to the carbon atom corresponding to C-1.

61 citations


Journal ArticleDOI
TL;DR: The methylene unit values were determined for forty-three sugar phosphates and related compounds on a polar (OV-17) and a non-polar (SE-30) phase and the structures of all derivatives were confirmed by mass spectrometry.

55 citations


Journal ArticleDOI
TL;DR: The reaction products show that the oxidation takes place almost entirely with cleavage of the C-2C-3 bond of the parent sugar, which suggests a free-radical, rather than a base-catalyzed, mechanism for the oxidative cleaving of the adduct.

40 citations


Journal ArticleDOI
TL;DR: In this article, a mechanism involving a termolecular rate-determining reaction among hypochlorite ion, hydroxide ion, and anion derived from the β-anomer of aldose is suggested.
Abstract: The kinetics of the oxidation of four aldoses, xylose, arabinose, mannose, and galactose have been investigated in highly alkaline media. The reactions show a brief initial induction period after which first-order dependence on both chloramine T, and the aldose follows. The order in hydroxide ions has been found to be second but shows a slight decrease at high concentration of alkali. The energies of activation have been obtained as 22–23·8 and 28–30 kcal mol–1 for the oxidation of pentoses and hexoses respectively. A mechanism involving a termolecular rate-determining reaction among hypochlorite ion, hydroxide ion, and the anion derived from the β-anomer of aldose is suggested. The oxidation rates follow the order xylose > arabinose > galactose > mannose.

10 citations


Journal ArticleDOI
TL;DR: A comparative study has been made of the ability of metal ions to catalyze the Lobry de Bruyn-Alberda van Ekenstein transformation and an analytical enzymic assay system was developed to monitor the rates of isomerization of hexose and triose phosphates.

9 citations