A New Method for Degrading Glucose to Xylose and Galactose to Arabinose.

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Abstract
It has been found that by treatment with periodic acid of such aldo-hexofuranosides in which the hydroxyl groups at C2 and C3 are in trans-position, experimental conditions can be established so that the oxidation is restricted to the glycol grouping outside the ring. Formaldehyde is therefore formed, and besides this is a monoaldehyde is obtained which by reduction gives an aldopento-furanoside. The method makes it possible to correlate the anomers of the aldohexofuranosides with those of the aldopentofuranosides.