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Is the electrocatalytic epoxidation of stilbene isomers using manganese (III) tetradentate Schiff bases complexes stereoselective?

Abstract : Three manganese (III) complexes were obtained with H2Salen derivatives and used as catalysts in the epoxidation reactions of E- and Z-stilbene isomers. The preparative electrolyses were carried out at 25 °C in acetonitrile solution containing 0.1 M TBAP, 10−3 M complex, 10−2 M 2-methylimidazole and 0.1 M benzoic anhydride plus stilbene as substrate. Our results showed clearly that E-stilbene was totally converted to Z-stilbene oxide whereas Z-stilbene leads to a mixture in which the benzaldehyde was the major by-product. In our experimental conditions, the turnovers recorded for different experiments were located in the 3.7–6.6 range.
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https://hal.univ-angers.fr/hal-03243907
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Soumis le : lundi 31 mai 2021 - 21:16:18
Dernière modification le : mardi 1 juin 2021 - 09:50:05

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Ali Ourari, Lotfi Baameur, Mustayeen A Khan, Gilles Bouet. Is the electrocatalytic epoxidation of stilbene isomers using manganese (III) tetradentate Schiff bases complexes stereoselective?. Electrochemistry Communications, 2008, 10 (11), pp.1736-1739. ⟨10.1016/j.elecom.2008.08.053⟩. ⟨hal-03243907⟩

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