Zuo Ren-bin
2007
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Journal
Chinese Journal of Synthetic Chemistry
Abstract
(E)-1-(2,4-dichlorophenyl)-3-(2-hydroxyphenyl)prop-2-en-1-one(2) was prepared by the reaction of 1-(2,4-dichlorophenyl)ethanone and salicylaldehyde and then cyclization with hydrazine monohydrate. Six novel 2-[1-acetyl-3-(2,4-dichlorophenyl)-4,5-dihydro-1H-pyrazol-5-yl]pheny lacetate derivatives(3a~3f) were synthesized from 2 and acyl chloride. The structures were characterized by 1H NMR, IR and elemental analysis. The biological activity experimental results showed that inhibition rate of 3f, 3d at 50 mg·L-1 towards H.Oryzae were 77.4%, 60.3% and towards P.oryzae were 66.3%, 69.2%, respectively. Inhibition rate of 3e at 50 mg·L-1 towards S.Sclerotiorum was 79.2%.