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Reactions of saccharides catalyzed by molybdate ions. VII. Preparation of L-ribose, D-, and L-lyxose

V. Bílik and J. Čaplovič

Inst. Chem., Slovak Acad. Sci., Bratislava

 

Abstract: Epimerization of L-arabinose, D-xylose, or L-xylose catalyzed by molybdate ions gives besides the epimeric aldopentose also small amounts of the complementary pair of epimeric aldopentoses. A part of the starting aldose can be recovered from the reaction mixture by crystallization. The epimeric aldose (18 — 23%) is isolated either in the form of free sugar using ion-exchange chromatography on Dowex 50 W (Ba2+) or in the form of iV-phenylglycosylamine. Aldopentoses released upon hydrolysis of such derivatives crystallize without difficulties.

Full paper in Portable Document Format: 274a547.pdf

 

Chemical Papers 27 (4) 547–550 (1973)

Monday, June 24, 2024

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