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Novel Ionic Liquid with Both Lewis and Brønsted Acid Sites for Michael Addition
Zhejiang Medicine Co. Ltd., Xinchang Pharmaceutical Factory, Zhejiang 312500, China
College of Chemistry & Chemical Engineering, Shaoxing University, Shaoxing 312000, China
* Author to whom correspondence should be addressed.
Received: 29 September 2011; in revised form: 19 October 2011 / Accepted: 19 October 2011 / Published: 28 October 2011
Abstract: Ionic liquid with both Lewis and Brønsted acid sites has been synthesized and its catalytic activities for Michael addition were carefully studied. The novel ionic liquid was stable to water and could be used in aqueous solution. The molar ratio of the Lewis and Brønsted acid sites could be adjusted to match different reactions. The results showed that the novel ionic liquid was very efficient for Michael addition with good to excellent yields within several min. Operational simplicity, high stability to water and air, small amount used, low cost of the catalyst used, high yields, chemoselectivity, applicability to large-scale reactions and reusability are the key features of this methodology, which indicated that this novel ionic liquid also holds great potential for environmentally friendly processes.
Keywords: novel ionic liquid; Michael addition; Lewis and Brønsted acid sites
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MDPI and ACS Style
Jiang, X.; Ye, W.; Song, X.; Ma, W.; Lao, X.; Shen, R. Novel Ionic Liquid with Both Lewis and Brønsted Acid Sites for Michael Addition. Int. J. Mol. Sci. 2011, 12, 7438-7444.
Jiang X, Ye W, Song X, Ma W, Lao X, Shen R. Novel Ionic Liquid with Both Lewis and Brønsted Acid Sites for Michael Addition. International Journal of Molecular Sciences. 2011; 12(11):7438-7444.
Jiang, Xiaoyue; Ye, Weidong; Song, Xiaohua; Ma, Wenxin; Lao, Xuejun; Shen, Runpu. 2011. "Novel Ionic Liquid with Both Lewis and Brønsted Acid Sites for Michael Addition." Int. J. Mol. Sci. 12, no. 11: 7438-7444.