Synthesis of Polymer Supported- Pd Base on PVA and Application It in Heck Reaction

Document Type : Research Article

Author

Chemistry Department, Lorestan university, Khoramabad, I.R. IRAN

Abstract

Polymers can be used as supporters in the synthesis of organic compounds. The most important reason in using polymers is the ease of separation. Polymers supporting the catalyst are the most interesting kind of polymers in supporting reactions. These polymers are recycled in a proper form for the re-use with a simple filter or the temperature. Some polymers which are used frequently include Polyethylene glycol and Polyvinyl alcohol. The polymers hybridized are the most appropriate choice for providing heterogeneous catalysts, recycle, and the use of them in reactions. The functions of catalysts, mostly, are in providing catalysts and also in applying them as supporters of Pt, Pd, Au, Ni, Fe and Ag metals. Providing effective heterogeneous catalysts, which are recyclable by using metal supporter polymers, is utilized for some reactions like cross coupling reactions. These reactions have the wide range of applications in pharmacy, agricultural chemistry and industry. In this study, we have extracted the Ligand for Palladium from PVA. It is done by conducting chemical reaction and the reformation of which in this process. Due to the appropriateness of supportive polymer, it has been provided with hybrid in order to promote the separation problem after the chemical reactions. Therefore, the general design is as the following: A. Preparation of Silica-PVA hybrid, B. Oxidation of Silica-PVA hybrid by Jones reagent,C. Preparation of imine by reaction of Hydroxylammonium chloride with oxidized Silica- PVA hybrid, D. Synthesis of Silica-PVA hybrid and Palladium complex, E. Heck reaction of idobenzene and methylacrylat in the presence of Silica-PVA-Pd complex as catalyst. The reaction products were identified by IR, UV-Vis, and GC-Mass analysis.

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References

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