Add time:09/08/2019         Source:sciencedirect.com

Degradation products from non-oxidative and oxidative treatment of d-galacturonic acid with alkali have been analysed by g.l.c.-m.s.; 13 hydroxy monocarboxylic acids and 26 dicarboxylic acids were identified in addition to several isomerisation products. In the absence of oxygen, the main degradation products were 3-deoxy-lyxo-hexaric, 3-deoxy-xylo-hexaric, malic, tartonic, C-methyltartronic, lactic, and 3-deoxytetronic acids. In the presence of oxygen, arabinaric, threaric, malic, tartronic, and glycolic acids were formed in large proportions. The routes of formation for most of the compounds are outlined.

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