Issue 9, 2011
From the journal:

New Journal of Chemistry

Urea-functionalized mesoporous polymeric catalyst: a cooperative effect between support and secondary amine on water-medium Knoevenagel reactions

Ruixing Zhu,a   Jian Shen,a   Yongyi Weia  and  Fang Zhang*a  

* Corresponding authors

a Department of Chemistry, Shanghai Normal University, Shanghai 200234, China
E-mail: zhangfang@shnu.edu.cn
Fax: +86 21-64322272
Tel: +86 21-64322642

Abstract

Urea-functionalized mesoporous polymers (urea-MPs) were synthesized through the surfactant-directed urea-phenol-formaldehyde oligomers self-assembly approach. The as-prepared urea-MPs material exhibited superior catalytic activity than parent urea in water-medium Knoevenagel condensation reactions and could be used repetitively for seven times. The excellent activity could be attributed to the synergic effect derived from the secondary amine with the surface phenolic groups in the mesoporous support, which generated the acid–base cooperative catalytic behavior. Meanwhile, the urea functional groups embedded in the mesopore wall could inhibit the leaching of active species and thus resulted in the relatively good durability.

Graphical abstract: Urea-functionalized mesoporous polymeric catalyst: a cooperative effect between support and secondary amine on water-medium Knoevenagel reactions

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Article information

DOI
https://doi.org/10.1039/C1NJ20030E
Article type
Paper
Submitted
17 Jan 2011
Accepted
25 May 2011
First published
06 Jul 2011

New J. Chem., 2011,35, 1861-1866

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Urea-functionalized mesoporous polymeric catalyst: a cooperative effect between support and secondary amine on water-medium Knoevenagel reactions

R. Zhu, J. Shen, Y. Wei and F. Zhang, New J. Chem., 2011, 35, 1861 DOI: 10.1039/C1NJ20030E

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