Abstract
Two non-metallic ketone catalysts resulted from fructose were first applied in the epoxidation of styrene with dry air to achieve considerably encouraging results, in which no any transition metal ion/oxide was involved. Ketone 1 was highly active, with the styrene conversion of 78.1 mol% and the epoxide selectivity of 92.0% at 363 K in 5 h. The poorer activity of ketone 2 was possibly associated with stronger steric hindrance of intermediate coordinative state. The occurrence of styrene epoxidation with dry air over the ketone could involve the coordination among solvent DMF, oxygen and ketone to form the peroxy ketone intermediate.
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Acknowledgments
The authors acknowledge the funding supports provided by National Natural Science Foundation of China (No. 20673035), by the 2007 excellent mid-youth innovative project of Hubei Provincial Education Department of China (No. T200701), by the project-sponsored by SRF for ROCS, SEM of China (No. [2007]24), by the key project of Hubei Provincial Science & Technology Department of China (2008CDA030), and by MOE Key Laboratory of Hubei University, China (No. 2006-KL-001).
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Lu, XH., Xu, G., Tang, ZR. et al. Non-Metallic Ketone Compounds Catalyzed Selective Epoxidation of Styrene with Dry Air. Catal Lett 132, 487–491 (2009). https://doi.org/10.1007/s10562-009-0117-6
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DOI: https://doi.org/10.1007/s10562-009-0117-6