Synthesis and reactions of some aryloxyacetylh drazones of the hexose series

A number of the aryloxyacetylhydrazones of D-galactose, D-glucose and D-mannose were prepared and their reaction have investigated. Periodate oxidation of some examples of these products gave the corresponding glyoxal monoaryloxyacetylhydrazones. Acetylation of the polyol part of the hydrazones was affected using acetic anhydride in pyridine whereas using boiling acetic anhydride caused a simultsneons heterocyclisation of the hydrazone residues. The structures of the products and the mechanism of their formations were discussed