Abstract Nickel(II) acetylacetonate bound to polybenzimidazole has been shown to be an efficient catalyst for the aerobic epoxidation of alkenes with an aldehyde as co-reactant. Rates of reaction and yields of epoxide are higher with this system than with dissolved Ni(II) acetylacetonate under otherwise identical conditions. The polymer-bound complex acts as a heterogeneous catalyst and can be recovered from the reaction mixture. Some loss of activity is observed upon re-use of the catalyst due to leaching of the metal complexes.
J. Chem. Soc., Perkin Trans. I (2000) 20, 3428-3431 Bastienne B. Wentzel, Salla-M. Leinonen, Stephen Thomson, David C. Sherrington,Martinus C. Feiters and Roeland J. M. Nolte