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Hydroesterification of ethylene oxide catalyzed by 1-butyl-3-methylimidazolium cobalt tetracarbonyl ionic liquid

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Abstract

In this paper, functional ionic liquid 1-butyl-3-methylimidazolium cobalt tetracarbonyl [Bmim][Co(CO)4] is prepared in a metathesis reaction between [Bmim]Cl and KCo(CO)4. The structure of [Bmim]+ is illustrated by 1H NMR, while [Co(CO)4] is confirmed by IR(νCO) spectrum. Methyl 3-hydroxypropionate(3-HPM), an intermediate to 1,3-propanediol (1,3-PDO), can be prepared in high yield by hydroesterification of ethylene oxide in the presence of a [Bmim][Co(CO)4] catalyst. Under a pressure of 3.7 MPa and at a temperature of 75 °C, the yield of 3-HPM can reach 90.8% in 10 h. Even after the catalyst is recycled three times, a yield of more than 80% can be obtained. A possible reaction mechanism has also been proposed.

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Acknowledgments

This research was supported by National Natural Science Foundation of China (20776071) and Introduced Talents Starting Foundation of QUST.

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Correspondence to Zhiguo Lv.

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Lv, Z., Wang, H., Li, J. et al. Hydroesterification of ethylene oxide catalyzed by 1-butyl-3-methylimidazolium cobalt tetracarbonyl ionic liquid. Res Chem Intermed 36, 1027–1035 (2010). https://doi.org/10.1007/s11164-010-0215-5

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  • DOI: https://doi.org/10.1007/s11164-010-0215-5

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