| Poly(ethylene glycol)-supported Piperazine——Synthesis and Application in Knoevenagel Condensation |
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| 作者单位： | College of Chemistry and Materials Science,Anhui Key Laboratory of Functional Molecular Solids,Anhui Key Laboratory of Molecular Based Materials,Anhui Normal University,Wuhu 241000,P.R.China |
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| 基金项目： | Supported by the National Natural Science Foundation of China(No.20872001);;the Natural Science Foundation of Education Administration of Anhui Province,China(No.KJ2008A064) |
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| 摘 要： |
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| 关 键 词： | Knoevenagel反应 乙二醇 哌嗪 催化剂制备 应用 合成 乙酰乙酸乙酯 丙二酸二乙酯 |
Poly(ethylene glycol)-supported Piperazine——Synthesis and Application in Knoevenagel Condensation |
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| Authors: | WANG Cui-e JIN Jie ZHANG Min YU Shu-yan SHANG Yong-jia HU Jin-song |
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| Institution: | College of Chemistry and Materials Science, Anhui Key Laboratory of Functional Molecular Solids,Anhui Key Laboratory of Molecular Based Materials, Anhui Normal University, Wuhu 241000, P. R. China |
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| Abstract: | A soluble,poly(ethylene glycol)-supported piperazine catalyst was prepared.This soluble catalyst efficiently catalyzes the Knoevenagel condensation of various aromatic aldehydes with diethyl malonate or ethyl acetoacetate in a homogeneous phase to afford the desired alkenes in good purity and yield with a facile work-up process.It was found that the polymer reagent could be repeatedly used at least four times without the too much loss of activity.The catalyst has shown a good activity,stability,and recyclin... |
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| Keywords: | Piperazine Polymer-supported catalyst Knoevenagel condensation |
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