Cyanomethyl ester of
4-(p-trifluoromethylphenoxy)-.alpha.-phenoxypropionic acid and a method
of controlling weeds therewith
    9.
    发明授权
    Cyanomethyl ester of 4-(p-trifluoromethylphenoxy)-.alpha.-phenoxypropionic acid and a method of controlling weeds therewith 失效
    4-(对三氟甲氧基苯氧基)-α-苯氧基丙酸的氰基甲酯和一种控制杂草的方法

    公开(公告)号:US4226614A

    公开(公告)日:1980-10-07

    申请号:US008624

    申请日:1979-02-01

    申请人: Beat Bohner Otto Rohr

    发明人: Beat Bohner Otto Rohr

    CPC分类号: C07C255/00 A01N39/02

    摘要: The present invention provides a novel herbicidally active ester, namely the cyanomethyl ester of 4-(p-trifluoromethylphenoxy)-.alpha.-phenoxypropionic acid of the formula ##STR1## It is a further object of the invention to provide a herbicidal composition which contains this novel ester as active component and also a post-emergence method of selectively controlling monocotyledonous weeds in crops of dicotyledonous plants. The invention furthermore provides a process for the manufacture of the novel ester by methods which are known per se by reaction of a corresponding trifluoromethyl-phenoxy-.alpha.-phenoxypropionic acid halide with hydroxyacetonitrile (cyanomethanol) or by reaction of 4-(p-trifluoromethylphenoxy)-phenol with a .alpha.-halopropionic acid cyanomethyl ester.

    摘要翻译: 本发明提供了一种新颖的除草活性酯,即下式的4-(对三氟甲基苯氧基)-α-苯氧基丙酸的氰甲基酯。本发明的另一个目的是提供一种除草组合物,其含有该新颖的 酯作为活性成分,也是在双子叶植物的作物中选择性地控制单子叶杂草的芽后方法。 本发明还提供了一种通过相应的三氟甲基 - 苯氧基-α-苯氧基丙酸卤化物与羟基乙腈(氰基甲醇)的反应或通过4-(对三氟甲基苯氧基) 苯酚与α-卤代丙酸氰甲酯。