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催化学报  2015 

PreysslerheteropolyacidsupportedonsilicacoatedNiFe2O4nanoparticlesforthecatalyticsynthesisofbis(dihydropyrimidinone)benzeneand3,4-dihydropyrimidin-2(1H)-ones

DOI: 10.1016/S1872-2067(14)60265-5, PP. 299-307

Keywords: Preyssler,Nickelferritenanoparticles,Magneticallygreencatalyst,Bis(dihydropyrimidinone)benzene,3,4-Dihydropyrimidin-2(1H)-ones

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Abstract:

?AnovelmagneticacidiccatalystcomprisingPreyssler(H14[NaP5W30O110])heteropolyacidsupportedonsilicacoatednickelferritenanoparticles(NiFe2O4@SiO2)wasprepared.ThecatalystwascharacterizedbyFouriertransforminfrared,scanningelectronmicroscopy,transmissionelectronmicroscopy,X-raydiffraction,energydispersivespectrum,VSMandparticlesizeneasurement.Itscatalyticactivitywasinvestigatedforthesynthesisofbis(dihydropyrimidinone)benzeneand3,4-dihydropyrimidin-2(1H)-onesderivativesbytheBiginellireaction.Withthecatalyst,thereactionsoccurredinlessthan1hwithgoodtoexcel-lentyields.Moreimportantly,thecatalystwaseasilyseparatedfromthereactionmixturebyanexternalmagnetandreusedatleastfivetimeswithoutdegradationintheactivity.

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