|
KMID : 0903519960390040297
|
|
Journal of the Korean Society of Agricultural Chemistry and Biotechnology
1996 Volume.39 No. 4 p.297 ~ p.303
|
|
|
Influence of 4,6 - disubstituted Heterocyclic Group on the Herbicidal Activity of N -(4,6 - disubstituted pyrimidin - 2 - yl) aminocarbonyl - 2 -(1,1 - ethylenedioxy - 2 - fluoro) ethylbenzenesulfonamide Derivativ
|
|
|
|
|
Abstract
|
|
|
|
A series of the herbicidal N-(4,6-disubstituted pyrimidin-2-yl)aminocarbonyl-2-(1,1-ethylenedioxy-2-fluoro)ethylbenzenesulfonamides, 1 and N-(4,6-disubstituted triazin-2-yl)aminocarbonyl-2-(1,1-ethylenedioxy-2-fluoro)ethylbenzenesulfonamides, 2 were synthesized and their herbicidal activities in-viva against rice(Oryza saliva L.), barnyard grass (Echinochloa crus-galli), bulrush(Scirpus juncoidesi and pickerel weed(Monochoria vaginalis presl.) were measured by the pot test under the paddy conditions. The structure activity relationships(SAR) between the herbicidal activity(pI_(50)) and a various physicochemical parameters of the hetero group and 4,6-disubstituents on the heterocyclic group were analyzed by the multiple regression technique. The SAR suggest that the 4,6-dimethoxypyrimidine substituent. 1a showed selective(△obs.pI_(50)=1.12) and the most highest activity against barnyard grass, which depend on the hydrophobicity(log P$lt;0) of heterocyclo group and moleculuar refractivity((M_R)_(opt.)=14.58 ㎤/㏖) constant of 4.6-disubstituents on the heterocyclic group.
|
|
|
KEYWORD
|
|
|
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|
|