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Overview of main reactions of carbohydrates under ammoxidative conditions: pathway A: Lobry de Bruyn–van Ekenstein transformation. B: Retro-aldol scission. C: Amadori-rearrangement. D/F: β-Hydroxycarbonyl elimination. E/G: Enediol/enaminol oxidation. H: Imine condensation. I: Oxidative α-dicarbonyl cleavage. J/K: Benzilic acid rearrangements. L: Imidazole formation (Radziszewski reaction). M: Pyrazine formation. N: Pyrazinol formation. O: Cyclization/dehydration.
