Synthesis, Characterization and Application of Poly(4-Methyl Vinylpyridinium Hydroxide)/SBA-15 Composite as a Highly Active Heterogeneous Basic Catalyst for the Knoevenagel Reaction
作者:Roozbeh Javad Kalbasi、Majid Kolahdoozan、Ahmadreza Massah、Keinaz Shahabian
DOI:10.5012/bkcs.2010.31.9.2618
日期:2010.9.20
prepared as a highly efficient heterogeneous basic catalyst by in situ polymerization method for the first time. It was characterized by XRD, FT-IR, BET, TGA, SEM and back titration using NaOH. This catalyst exhibited the excellent catalytic activities for the Knoevenagel condensation of various aldehydes with ethyl cyanoacetate. Over this catalyst, α,β-unsaturated carbonyl compounds were obtained
本文首次采用原位聚合法制备了聚(4-甲基乙烯基吡啶鎓氢氧化物)/SBA-15复合材料作为一种高效的非均相碱性催化剂。采用 XRD、FT-IR、BET、TGA、SEM 和 NaOH 反滴定对其进行了表征。该催化剂对各种醛与氰基乙酸乙酯的 Knoevenagel 缩合反应表现出优异的催化活性。在该催化剂上,α,β-不饱和羰基化合物在 95 °C 下在 H 2 O 作为溶剂中 10-30 分钟内以合理的产率获得,对缩合产物的选择性为 100%。催化剂在反应后可以很容易地回收,并且可以重复使用而不会显着损失活性/选择性性能。无副产物形成,收率高,反应时间短,温和的反应条件和操作简单以及催化剂的可重复使用性是本合成方案的显着特征。H 2 O 作为溶剂的存在也被认为是一种“绿色方法”。