Al- driven deoxydehydration (DODH) of glycols in the presence of pincer type mo-catalyst

This study demonstrates that the zero-valent elements aluminum, zinc, iron, manganese, copper, and carbon are effective reductants for the ONO-pincer ligated molybdenum dioxo catalyzed deoxydehydration (DODH) of polyols. The reductants (elements) and their oxidized products remain insoluble during the reaction and can be easily separated. The cis-MoO2(dipic)L (dipic = pyridine-2,6-dicarboxylate); L=HMPA (Hexamethylphosphoramide), THF), and cis-MoO2(4-Chloro-dipic) HMPA catalysts (1) were found to be effective for the DODH of polyols. The stoichiometric experiments indicate a probable transition from Mo (VI) to Mo (IV) in the redox cycle for the DODH of polyols.

Automated summary

This study demonstrates the effectiveness of zero-valent elements as reductants for the deoxydehydration reaction of polyols catalyzed by ONO-pincer ligated molybdenum dioxo. The insolubility and easy separability of the reductants and their oxidized products during the reaction are emphasized. Additionally, the choice of ligand has an impact on the catalytic performance of the reaction.