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- W2354078488 abstract "Aryloxyphenoxypropionic acid( APP) herbicides inhibiting acetyl-CoA carboxylase( ACCase) have been identified as one of the most important herbicides. As part of continuous efforts to search for new herbicides with high efficacy,broad-spectrum activity and safety to crops,the commercialized APP herbicide metamifop was used as lead compounds for further optimization. Sixteen new N-arylmethyl 2-( 4-arylxoyphenoxy) propionamide compounds were designed and prepared by multistep synthetic procedures starting from( R)-( +) 2-( 4-hydroxyphenoxy) propanoic acid,and their structures were characterized by1H NMR, 13C NMR,LC/MS,IR and elemental analysis. Steric configuration was confirmed by chiral column liquid chromatography. The bioassay results indicated that all compounds exhibited 90% activity against crabgrass( Digitaria sanguinalis L.),barnyard grass( Echinochloa crus-galliL.) and green foxtail( Setaria Viridis L.) at 2250 g/ha. Further herbicidal activity and phytotoxicit to crops results indicated that( R)-( +)-N-[( 6-chloropyridin-3-yl) methyl]- 2-( 4-{ [3-chloro-5-( trifluoromethyl) pyridin-2-yl]oxy} phenoxy)-propanamide( 2b) was more effective against Digitaria sanguinalis( IC 50 = 15. 4 g/ha) and Echinochloa crus-galli( IC 50 = 22. 8 g/ha) than metamifop( IC 50 = 31. 9 g/ha and 25. 0 g/ha). In particular,compound 2b was safe to rice( Xiang zao xian 24) and more effective against Leptochloa than commercial cyhalofop-butyl. The herbicidal activity is related to steric configuration that the compounds of R configuration have more effective activity." @default.
- W2354078488 created "2016-06-24" @default.
- W2354078488 creator A5021038002 @default.
- W2354078488 date "2014-01-01" @default.
- W2354078488 modified "2023-09-23" @default.
- W2354078488 title "Synthesis and Herbicidal Activity of N-Arylmethyl-2-( 4-arylxoyphenoxy) propionamide" @default.
- W2354078488 hasPublicationYear "2014" @default.
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