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| A new approach to the synthesis of diacetals (diketals) pentaerythritol catalyzed by SO3H-functionalized ionic liquids |
| Yuan Yuan Wang, Yan Nan Xu, Zhi Zhong Wang, Li Yi Dai |
| Shanghai Key Laboratory of Green Chemistry and Chemical Process, Department of Chemistry, East China Normal University, Shanghai 200062, China |
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Abstract In this article, an efficient, simple and environmentally friendly approach to the synthesis of diacetals (diketals) pentaerythritol using SO3H-functionalized ionic liquids (ILs) as catalysts was reported. The Ils show high catalytic activity and reusability with good to excellent yields of the desired products. Hammer method has been used to determine the acidity order of these ionic liquids and the results are consistent with the catalytic activities observed in acetalization reaction. Maximum product yield of 93% was observed on using [PSPy] [Otf]as catalyst and it can be reused at least 8 times without obvious activity loss.
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Received: 30 September 2009
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| Fund:This research is supported by National 863 High-Tech Research and Development Program of China (No. 2007AA05Z101). |
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Corresponding Authors:
Li Yi Dai,E-mail address:lydai@chem.ecnu.edu.cn
E-mail: lydai@chem.ecnu.edu.cn
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