%0 Journal Article
%T SulfuricAcid([3-(3-Silicapropyl)sulfanyl]propyl)esterasaRecyclableCatalystfortheSynthesisof4,4'-(Arylmethylene)bis(1H-pyrazol-5-ols)
%A Shekoofeh TAYEBI
%A Mojtaba BAGHERNEJAD
%A Dariush SABERI
%A Khodabakhsh NIKNAM
%J ´ß»¯Ñ§±¨
%P 1477-1483
%D 2011
%R 10.1016/S1872-2067(10)60260-4
%X £¿Sulfuricacid([3-(3-silicapropyl)sulfanyl]propyl)esterisemployedasarecyclablecatalystforthecondensationreactionbetweenaromaticaldehydesand3-methyl-l-phenyl-5-pyrazolone.Thiscondensationreactionwasperformedinethanolunderrefluxingconditionsgiving4,4'-alkylmethylene-bis(3-methyl-5-pyrazolones)in74-90%yields.Theheterogeneouscatalystwasrecycledandusedinelevenrunsforthereactionbetweenbenzaldehydeand3-methyl-l-phenyl-5-pyrazolonewithoutlosingcatalyticactivity.
%K sulfuricacid([3-(3-silicapropyl)sulfanyl]propyl)ester
%K silica-bondedN-propylsulfamicacid
%K 3-methyl-l-phenyl-5-pyrazolone
%K aldehydes
%U http://www.chxb.cn/CN/abstract/abstract20513.shtml