On the Constitution of Glucosone (Fructosone) Methyiphenyihydrazone

Abstract

Fructose methylphenylhydrazone-2, considered to be the isomer of glucosone methylphenylhydrazone to date, consumes over 5 moles of periodic acid in oxidation and forms by catalytic reduction, not the corresponding glucosaminol and mannosaminol, but fructose itself. On the contrary, glucosone (fructosone) methylphenylhydrazone consumes 4 mols of oxygen by periodic acid oxidation to form glyoxalic acid methylphenylhydrazone and absorbs 2 moles of hydrogen by catalytic reduction with palladium-carbon to form isoglucosamine. The fact indicates that the hydrazine residue in such hydrazones is bonded at C₁.