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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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CobaltNanoparticlesPromotedHighlyEfficientOnePotFour-ComponentSynthesisof1,4-DihydropyridinesunderSolvent-FreeConditions
DOI: 10.1016/S1872-2067(10)60295-1, PP. 1850-1855
Keywords: cobaltnanoparticle,1,4-dihydropyridine,four-componentcondensation,heterogeneoucatalyst,magneticallyseparablecatalyst
Abstract:
？AstraightforwardandgeneralmethodhasbeendevelopedforthesynthesisofC5-unsubstitiuted1,4-dihydropyridinesbyareactionusingdimedone,acetophenone,aromaticaldehydes,andammoniumacetateinthepresenceofacatalyticamountofConanoparticlesasaheterogeneousandeco-friendlycatalystwithhighcatalyticactivityatroomtemperatureundersolvent-freeconditions.Thiscatalystiseasilyseparatedbymagneticdevicesandcanbereusedwithoutanyapparentlossofactivityforthereaction.Inaddition,itisveryinterestingthatwhenusingConanoparticlesasacatalyst,spatially-hinderedaldehydessuchas2-methoxy-,2-fluoro-,and2-chloro-aldehydesaresuitableforthisreaction.
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