Author： Zheng Renwei Wang Xiaoxia Xu Hui Du Jingxing
Publisher： Taylor & Francis Ltd
ISSN： 0039-7911
Source： Synthetic Communications, Vol.36, Iss.11, 2006-06, pp. : 1503-1513
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Abstract
A novel ionic liquid, 3-carboxymethyl-1-methylimidazolium bisulfate (CMImHSO 4 ), was synthesized and used as a recyclable catalyst for the Biginelli reaction under solvent-free conditions. High yields of various substituted 3,4-dihydropyrimidin-2(1 H )-ones (or thiones) were obtained. The ionic liquid can be recovered and recycled easily without loss of activity.
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