| 摘要 |
NEW MATERIAL:A compound shown by the formula I (X is H, methyl, Cl, methoxy, nitro, etc.; n is 1-3; R1 and R2 are H, lower alkyl, aryl, 2-methoxyethyl, with the proviso that R1 and R2 are not H at the same time). EXAMPLE:N,N-Dimethyl-3-{2-(3-trifluorophenoxy)ethoxy}benzoic acid amide. USE:A herbicide. Showing herbicidal activity against various kinds of harmful weeds including strong weeds in paddy fields (e.g., Echinochloa crus-galli Beauv. var. praticola Ohwi., umbrella plant, long stemmed water-wort, etc.) and strong weeds in plowed fields (e.g., Amaranthus viridis L., large crab-grass, etc.). Having no phytotoxicity to rice plant and soybean. PREPARATION:A 2-phenoxyethyl halide shown by the formula II (Y is halogen) is reacted with a metahydroxybenzoic acid amide derivative shown by the formula III in the absence of a solvent or in an inert organic solvent such as toluene, xylene, etc. in the presence of a dehydrohalogenating agent such as Na2CO3, etc. under heating, to give a compound shown by the formula I . |
