%0 Journal Article
%T Bismuthtriflate:Ahighlyefficientcatalystforthesynthesisofbio-activecoumarincompoundsviaone-potmulti-componentreaction
%A Mahmoud. Abd
%A El Aleem. Ali
%A Ali. El-Remaily
%J ´ß»¯Ñ§±¨
%P 1124-1130
%D 2015
%R 10.1016/S1872-2067(14)60308-9
%X £¿Aseriesofcoumarin-chalconehybridcompoundsandcoumarinslinkedtopyrazolinewassynthesizedingoodyieldandshorttimeusingasimpleandefficientmethod.Thismethodinvolvedtheone-potreactionofsalicylaldehyde,an¦Á-ketoesterandanaromaticaldehyde(inthecaseofthecoumarin-chalconederivatives)inadditiontohydrazinehydrate(inthecaseofthepyrazolylcoumarins)inthepresenceofacatalyticamountofbismuthtriflate[Bi(OTf)3,5mol%].Thesynthesizedcompoundsshowedscavengingactivitytowardsthefreeradical2,2-diphenyl-1-picrylhydrazyl.AllcompoundswerecharacterizedusingIR,1HNMRand13CNMRspectroscopy.
%K Coumarin
%K Chalcone
%K Pyrazoline
%K One-potmulti-componentreaction
%K Salicylaldehyde
%K ¦Á-Ketoester
%K Bismuthtriflate[Bi(OTf)3]
%U http://www.chxb.cn/CN/abstract/abstract21592.shtml