%0 Journal Article
%T Silica-BondedN-PropylpiperazineSodiumn-PropionateasRecyclableBasicCatalystforSynthesisof3,4-Dihydropyrano[c]chromeneDerivativesandBiscoumarins
%A Khodabakhsh NIKNAM
%A Abbas JAMALI
%J ´ß»¯Ñ§±¨
%P 1840-1849
%D 2012
%R 10.1016/S1872-2067(11)60457-9
%X £¿Asimpleandefficientprocedureforthepreparationofsilica-bondedN-propylpiperazinesodiumn-propionate(SBPPSP)bythehydrolysisofsilica-bondedN-propylpiperazinemethyln-propionate(SBPPMP)inhydrochloricacid(0.5mol/L)followedbytreatmentwithsaturatedsodiumbicarbonateisdescribed.TheSBPPMPwasobtainedbythereactionof3-silica-bondedN-propylpiperazineandmethylacrylateinmethanol.SBPPSPwasusedasarecyclablebasiccatalystforthesynthesisof3,4-dihydropyrano[c]chromenesbythereactionofaromaticaldehydes,malononitrile,and4-hydroxycoumarininaqueousethanol(1:1v/v)underrefluxconditions.Biscoumarinswerealsoobtainedviacondensationofaldehydesand4-hydroxycoumarininaqueousethanol(1:1v/v)underrefluxconditions.Thecatalystcouldberecycledseveraltimeswithoutanyadditionaltreatment.
%K silica-bondedN-propylpiperazinesodiumn-propionate
%K silica-bondedN-propylpiperazinemethyln-propionate
%K aromaticaldehydes
%K 3
%K 4-dihydropyrano[c]chromenes
%K biscoumarins
%U http://www.chxb.cn/CN/abstract/abstract20837.shtml