Basic polymerized imidazolide-based ionic liquid: an efficient catalyst for aqueous Knoevenagel condensation

被引：14

作者：

Ding, Libing ^{[1
]}

Li, Hansheng ^{[1
]}

Zhang, Yaping ^{[1
]}

Zhang, Kun ^{[1
]}

Yuan, Hong ^{[1
]}

Wu, Qin ^{[1
]}

Zhao, Yun ^{[1
]}

Jiao, Qingze ^{[1
,2
]}

Shi, Daxin ^{[1
]}

机构：

[1] Beijing Inst Technol, Sch Chem Engn & Environm, Beijing 100081, Peoples R China

[2] Beijing Inst Technol, Sch Chem Engn & Mat Sci, Zhuhai 519085, Peoples R China

来源：

RSC ADVANCES | 2015年 / 5卷 / 27期

基金：

对外科技合作项目（国际科技项目）;

关键词：

ROOM-TEMPERATURE; GREEN PROCEDURE; SOLVENT-FREE; MEDIA; WATER; SURFACTANT; ALDEHYDES;

D O I：

10.1039/c5ra01700a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A novel basic polymerized ionic liquid (BPIL): polymeric 1-[(4-ethenylphenyl)methyl]-3-propylimidazolium imidazolide was synthesized and characterized by Fourier transform infrared (FT-IR), nuclear magnetic resonance (NMR) and electron spray ionization mass spectrometry (ESI-MS). The BPIL was used as an efficient catalyst for aqueous Knoevenagel condensations with extended substrates. In comparison with common base catalysts, the BPIL showed high catalytic activity, which was ascribed to the cooperation between the strong basicity and the high surface activity. Moreover, the BPIL with high molecular weight has high surface activity and low catalytic activity. In addition, the BPIL was easily recovered and maintained high catalytic activity after five cycles of use in the system using benzaldehyde and malononitrile as substrates.

引用

页码：21415 / 21421

页数：7

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