4-(N,N-dimethylamino)pyridine-embedded nanoporous conjugated polymer as a highly active heterogeneous organocatalyst.
4-(N,N-dimethylamino)pyridine-embedded nanoporous conjugated polymer as a highly active heterogeneous organocatalyst.
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DOI：
10.1002/chem.201103028
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发表时间：
2012-05
期刊：
影响因子：
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通讯作者：
Yuan Zhang;Y. Zhang;Y. Sun;Xin Du;J. Shi;Wei Wang;Wei Wang
中科院分区：
文献类型：
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作者：
Yuan Zhang;Y. Zhang;Y. Sun;Xin Du;J. Shi;Wei Wang;Wei Wang
本文首次报道了一种多功能有机催化剂4-（N，N-二甲基氨基）吡啶（DMAP）通过自下而上的方法被引入到纳米多孔共轭聚合物（NCP）的网络中。所得DMAP-NCP材料具有高度浓缩和均匀分布的DMAP催化位点（2.02 mmol g（-1））。由于“自下而上”单体的强共价键和刚性，DMAP-NCP还表现出增强的稳定性和永久孔隙率。结果表明，DMAP-NCP在醇的酰化反应中表现出良好的催化活性，产率为92- 99%。DMAP-NCP催化剂可以很容易地从反应混合物中回收，并在至少14个连续循环中重复使用而没有可测量的活性损失。此外，催化酰化反应可以在净和连续流动条件下进行至少536 h的连续工作，具有相同的催化剂活性。
We report herein for the first time the incorporation of a versatile organocatalyst, 4-(N,N-dimethylamino)pyridine (DMAP), into the network of a nanoporous conjugated polymer (NCP) by the "bottom-up" approach. The resulting DMAP-NCP material possesses highly concentrated and homogeneously distributed DMAP catalytic sites (2.02 mmol g(-1)). DMAP-NCP also exhibits enhanced stability and permanent porosity due to the strong covalent linkage and the rigidity of the "bottom-up" monomers. As a result, DMAP-NCP shows excellent catalytic activity in the acylation of alcohols with yields of 92-99 %. The DMAP-NCP catalyst could be easily recovered from the reaction mixture and reused in at least 14 consecutive cycles without measurable loss of activity. Moreover, the catalytic acylation reaction could be performed under neat and continuous-flow conditions for at least 536 h of continuous work with the same catalyst activity.