Zhou Yong-chang
2004
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Journal
Journal of Shenyang Institute of Chemical Technology
Abstract
5-Methyl-3,5-dicarbethoxy-2-cyclopenten-2-hydroxy-1-one was an important intermediate for perfume compound 3-methyl-2-hydroxy-cyclopent-2-en-1-one ,which was synthesized from ethyl propionate,diethyl oxalate and ethyl acrylate.The optimum conditions of the Michael addition,Dieckmann ester condensation reactions was temperature 80 ℃,reaction time 7 h and n(2-methyl-3-oxo-butanedlioic acid diethyl ester)∶n(ethyl acrylate)=1∶1.8 in 62.50 % yield.The product was characterized by IR and~1 H-NMR.