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Revised Interpretation of the Methylation Data Concerning Melezitose

Revised Interpretation of the Methylation Data concerning Melezitose [Pg.30]

The presence of the pyranose ring in the two D-glucose units of melezitose was inferred by Zempl6n and Braun from good evidence, and made certain by Miss Leitch through the crystallization of the requisite amount of 2,3,4,6-tetramethyl-D-glucose from the scission products of the fully methylated trisaccharide. The revised interpretation of Miss Leitch s experimental data concerns only the structure of the [Pg.30]

D-fructose unit, which is now established as of the furanose type. A configurational formula for melezitose that is limited to the expression of these ring structures and leaves open the matter of a,ff classification is shown by XV. [Pg.31]

Recent work by Richtmyer and the writeri has confirmed this formula XV through a study of the oxidation of melezitose by per-iodic acid. They found that the oxidation resulted in the reduction of 4 moles of the acid to 4 moles of iodic acid for each mole of sugar, and the generation of 2 moles of formic acid no formaldehyde could be detected. It can be shown that these analytical measurements lead to this formula by an independent conclusive proof. [Pg.31]

The absence of formaldehyde from the oxidation products proves [Pg.31]




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Data interpretation

Interpreting data

Melezitose methylated

Melezitose methylation

Methylation, of melezitose

Of melezitose

Revised

Revisions

The Data

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