Carbohydrate Research p. 179 - 188 (1986)
Update date:2022-08-05
Topics:
Butera, Loredana
Englard, Sasha
Blanchard, John S.
Avigad, Gad
The mono- (2) and bis-phosphate (3) derivatives of D-threo-2,5-hexodiulose (1) (5-keto-D-fructose) were synthesized enzymically and purified by anion-exchange chromatography.The proportions, sizes of ring, and anomeric configurations were determined by F.t. 31P- and 13C-n.m.r. spectroscopy.Compound 2 was found to exist preponderantly (70-78percent) in the β-pyranose form with the remainder existing in the 2R,5R-furanose form.Compound 3 assumes two different furanose forms in solution, one (77-84percent) being the 2R,5R-furanose form and the other the 2S,5R-furanose form.
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