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Primary amine-functionalized mesoporous phenolic resin as an effective and stable solid base catalyst for Knoevenagel reactions in water
Green Synthesis and Catalysis ( IF 8.2 ) Pub Date : 2020-07-27 , DOI: 10.1016/j.gresc.2020.05.007
Kaixuan Wang , Huating Jiang , Min Tong , Yao Xiao , Hexing Li , Fang Zhang

A primary amine functionalized ordered mesoporous phenolic resin (NH2-MPR) was obtained by an evaporation-induced self-assembly method. The as-prepared NH2-MPR material possessed large surface area and ordered two-dimensional hexagonal mesoporous structure. Also, the amine groups were well-dispersed in the mesoporous channels. It can act as an efficient solid base to promote Knoevenagel condensation of various aldehydes with ethyl cyanoacetate in water with high conversion and selectivity. This excellent performance was attributed ordered mesopores and hydrophobic pore surface, which resulted in the decreased the interference of water solvent and the increased active sites accessibility. Noted that it was comparable with homogenous base catalysts in the water-medium Knoevenagel condensation reaction, and it can be reused for at least five times without significant reduction in the catalytic efficiency.



中文翻译:

伯胺官能化介孔酚醛树脂可作为有效稳定的Knoevenagel水溶液中的固体碱催化剂

通过蒸发诱导自组装法获得伯胺官能化的有序介孔酚醛树脂(NH 2 -MPR)。制备的NH 2-MPR材料具有大的表面积并具有二维的六角形介孔结构。同样,胺基团很好地分散在中孔通道中。它可以作为高效的固体碱,以高转化率和选择性促进水中各种醛与氰基乙酸乙酯的Knoevenagel缩合反应。优异的性能归因于有序的中孔和疏水孔表面,从而减少了对水溶剂的干扰并增加了活性位点的可及性。注意到它在水介质Knoevenagel缩合反应中与均相碱催化剂相当,并且可以重复使用至少五次而不会显着降低催化效率。

更新日期:2020-09-29
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