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Organo-polyoxometalate-Based Hydrogen-Bond Catalysis

Abstract : Several urea-inserted organo-polyoxometalates (POMs) derived from polyoxotungstovanadate [P2V3W15O61] 9- were prepared. The insertion of the carbonyl into the polyoxometallic framework activates the urea toward Hydrogen-bond catalysis. This was shown on the Friedel-Crafts arylation of trans-b-nitrostyrene. Modelling shows that the most stable form of the organo-POMs features an antiparallel arrangement of the two N-H bonds, but that the likely catalytically active parallel form is accessible at room temperature. Finally, it is possible that the oxo substituents next to the vanadium atoms may help the approach of the nucleophile via H-bonding.
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https://hal-univ-lyon1.archives-ouvertes.fr/hal-03376764
Contributor : Emmanuel Lacôte Connect in order to contact the contributor
Submitted on : Wednesday, October 13, 2021 - 4:46:18 PM
Last modification on : Friday, October 15, 2021 - 3:27:49 AM

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Debora Vilona, Moreno Lelli, Elise Dumont, Emmanuel Lacôte. Organo-polyoxometalate-Based Hydrogen-Bond Catalysis. Chemistry - A European Journal, Wiley-VCH Verlag, In press. ⟨hal-03376764⟩

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