Poly(ethylene glycol)-supported Piperazine-Synthesis and Application in Knoevenagel Condensation
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 acetoa-cetate 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 recycling capability.
作 者： WANG Cui-e JIN Jie ZHANG Min YU Shu-yan SHANG Yong-jia HU Jin-song 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 刊 名： 高等学校化学研究（英文版） ISTIC SCI 英文刊名： CHEMICAL RESEARCH IN CHINESE UNIVERSITIES 年，卷(期)： 2010 26(2) 分类号： O6 关键词： Piperazine Polymer-supported catalyst Knoevenagel condensation