Selective Oxidation of Glycolaldehyde to Glyoxal Using Ruthenium Complex Catalysts

gas as an oxidant. Furthermore, the obtained mixture was reacted with sodium sulfite to form precipitates, which are bisulfite adducts. It could be easily separated as a glyoxal equivalent from the catalyst and solvent by filtration. These results indicate that a new method for the synthesis of glyoxal from biomass-derived glycolaldehyde has been achieved.