Structures of d-threo-2,5-hexodiulose 1-phosphate and d-threo-2,5-hexodiulose 1,6-bisphosphate (5-keto-d-fructose mono- and bis-phosphate) in solution by 13C-N.M.R. spectroscopy☆

Add time:08/26/2019    Source:sciencedirect.com

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 (70–78%) 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 (77–84%) being the 2R,5R-furanose form and the other the 2S,5R-furanose form.

We also recommend Trading Suppliers and Manufacturers of D-FRUCTOSE-1-13C (cas 108311-21-3). Pls Click Website Link as below: cas 108311-21-3 suppliers

Prev:Manifestation of anomeric form, ring structure, and linkage in the 13c-n.m.r. spectra of oligomers and polymers containing D-fructose: maltulose, isomaltulose, sucrose, leucrose, 1-kestose, nystose, inulin, and grass levan☆
Next:C-Npys (S-3-nitro-2-pyridinesulfenyl) and peptide derivatives can inhibit a serine-thiol proteinase activity from Paracoccidioides brasiliensis)