| abstract |
NEW MATERIAL:A compound of formula I [X is O, S; R is halogen, cyano, OH, mercapto, hydrocarbyloxy, hydrocarbylthio, epoxy, acyl, acyloxy, acylthio, substituted or unsubstituted amino, alkyl or alkenyl which are substituted with heterocyclic groups]. n EXAMPLE: 1-Methyl-2-methoxyethyl 2-nitro-5-(2'-chloro-4'-trifluoromethylphenoxy) phenylacetate. n USE: Selective herbicide: it can do selective control of weeds in crop plants such as rice, cereal, cotton and so on with reduced application amounts by pre- or post- emergence application without damage to the crop plants and injury to mammarian animals and fishes. n PREPARATION: For example, the reaction of 4-trifluoromethylphenol derivative of formula II (M is alkali metal) with a phenylacetic derivative of formula III(Y is halogen) is carried out in an inert solvent to give the compound of formula I. n COPYRIGHT: (C)1985,JPO&Japio |