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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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Palladiumparticlesfromoxime-derivedpalladacyclesupportedonFe3O4/oleicacidasacatalystforthecopper-freeSonogashiracross-couplingreaction
DOI: 10.1016/S1872-2067(15)60837-3, PP. 1047-1053
Keywords: Oxime-derivedpalladacycle,Sonogashiracross-couplingreaction,Copper-free,Magnetite/oleicacid,LowPdloading
Abstract:
？Anoxime-derivedpalladacyclewassynthesizedusing4-bromobenzoximeandpyridineinCHCl3,andcharacterizedbyFT-IRand1HNMRspectroscopy.ThisPdcomplexwassupportedonFe3O4/oleicacidandshowntobeanefficientcatalystforthecopper-freeSonogashiracross-couplingreactionofvariousarylhalideswithphenylacetyleneinairandinethanolormixedaqueousmedium.Theoxime-derivedpalladacyclegavehighlyactivepalladiumnanoparticlesfortheorganicsynthesis.ThecouplingproductswereobtainedinhighyieldswithlowPdloadingandtheheterogeneouscatalystcanbeseparatedbyanexternalmagnetandreusedsixtimeswithoutlossofitsactivity.ThecharacterizationofthecatalystwascarriedoutbyXRD,SEMandTEM.BothTEMandXRDrevealedthatthepalladiumnanoparticleswerewelldispersedwithdiametersfrom5to10nmandaveragesize9.97nm.
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