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发明授权
US4183743A Novel herbicidally active, nuclear-substituted phenoxy-phenoxy-alkanecarboxylic acid derivatives and use thereof for controlling grass-like weeds 失效
新型除草活性的核取代苯氧基 - 苯氧基 - 烷酸羧酸衍生物及其用于控制​​草类杂草的用途

Novel herbicidally active, nuclear-substituted phenoxy-phenoxy-alkanecarboxylic acid derivatives and use thereof for controlling grass-like weeds
摘要：
The invention is concerned with new herbicidally active 4-phenoxy-.alpha.-phenoxy-alkanecarboxylic acid derivatives, especially propionic acid esters of the type ##STR1## bearing in the first phenoxy radical a nitro group besides another substituent R.sub.1 which is preferably a halogen atom, the CF.sub.3 group is lower alkyl, alkoxy or alkoxycarbonyl group. The invention is further concerned with herbicidal compositions containing such new derivatives and with methods for the selective control of grass-like weeds in crops of dicotyledonous and monocotyledonous cultivated plants such as cereals.
摘要（中）：

本发明涉及新的除草活性的4-苯氧基-α-苯氧基 - 链烷羧酸衍生物，特别是在第一个苯氧基中含有硝基的丙酸酯，除了另外的优选卤素原子的取代基R1外， CF 3基团是低级烷基，烷氧基或烷氧基羰基。 本发明还涉及含有这种新衍生物的除草组合物，以及用于选择性地控制双子叶植物和单子叶栽培植物如谷物的草类杂草的方法。

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