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Aerobic epoxidation of alkenes using polymer-bound Mukaiyama catalysts

2000; Royal Society of Chemistry; Issue: 20 Linguagem: Inglês

10.1039/b005066k

2050-8263

Bastienne B. Wentzel, Salla‐M. Leinonen, Stephen Thomson, David C. Sherrington, Martinus C. Feiters, Roeland J. M. Nolte,

Synthetic Organic Chemistry Methods

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.