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성낙도(Nack-Do Sung),송종환(Jong-Whan Song) 한국농약과학회 2000 농약과학회지 Vol.4 No.2
The herbicidal activities (pI??) with alkoxy (RO-) groups on the azomethine nitrogen atom in 5-(2,3-dihydro-2,2-dimethylbenzothiophene-7-y1)-2-(1-(alkoxyimino)-butyl)-3-hydroxy-2-cyclohexene-1-one derivatives against various weeds were measured in the flooded and in the paddy conditions. Particularly, i-propoxy substituent, 5 of them showed excellent herbicidal activity at a rate of 4㎏/㏊ with pre-emergence against barnyard grass (Echinochlora crus-galli) with good selectivity on rice plant (Oryza sativa). The results of the structure-activity relationships (SAR) analyses are shown that the alkyl subsituents with higher hydrophobicity (logP>0) and electron donating (σ*<0) group as a new substrate rather than alkoxy substituents seems to be contribute to the herbicidal activity with pre-emergence.
3 - ( 치환 ( X ) - phenyl ) - 1 - ( 2 - furyl ) propenone 유도체의 항균활성
성낙도(Nack Do Sung),강희덕(Hee Deog Kang),맹주앙(Joo Yang Maeng),신동린(Dong Rin Shin) 한국응용생명화학회 1994 Applied Biological Chemistry (Appl Biol Chem) Vol.37 No.4
New 3-phenyl-1-(2-furyl)propenones, 1 and 3-phenyl-1-(2-furyl)-3-thiophenyl-propanone, 2 derivatives were synthesized, and their fungicidal activities in vitro against Botrytis cineria (BC), Valsa ceratosperma (VC), Scelerotium cepivorum (SC) and Phytophthora capsici (PC) were investigated using a generalized structure-activity relationship (SAR). The activity of 1 was superior to those of 2, and nonsubstituent, 1a and chloro group substituent, 1d of E (Syn) conformer were the most effective (EC_(50)=10∼12 ppm) compound to BC. Antifungal activities were able to predict to depend essentially on the β carbon and their positive charge from the results that the good correlation (r²= 0.90) was observed between hydrolysis rate constant (logk) of 1 and the electronic parameter (σ) of X-substituent on the β-phenyl ring.