کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5178011 | 1502486 | 2017 | 11 صفحه PDF | دانلود رایگان |
- Dendronized polymer as a heterogeneous catalyst.
- Synthesis of tetra-substituted imidazole derivatives.
- Higher generation better than lower generation.
- Dendronized polymer better than Dendrigraft polymer.
Merrifield resin supported dendronized polymer and its copper complex having ethylene glycol initiated polyepichlorohydrin as core (EG-Gn-Cu, n = 0,1,2) have been synthesised for the first time and characterized. They were found to be highly selective heterogeneous catalysts for the synthesis of tetra-substituted imidazole derivatives under mild reaction conditions. Higher generation dendronized polymer showed increased catalytic activity due to extension and rigidification of the linear polymeric core. Dendronized EG-G2-Cu catalyst was found to be better over dendrigraft GLR-G2-Cu catalyst. No leaching of the metal from the catalyst was observed. Reusability of the catalyst was tested for five cycles without loss of significant catalytic activity.
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Journal: Polymer - Volume 120, 30 June 2017, Pages 100-110