Novel 2-nitro-5-(4-trifluoromethylphenoxy)-N-substituted benzamides optionally containing additional ring substituents, herbicidal compositions containing them and the use of the novel compounds for combating weeds particularly those in an agronomic crop area.
The novel compounds are of the formula:
wherein
X is hydrogen, halogen, (Ct-C4)alkyl, cyano or trifluoromethyl;
Y is hydrogen or halogen;
R1 is hydrogen, hydroxy, (Ct-C4)alkoxy, (C1-C4)-alkyl optionally substituted with various defined substituents, or monocyclic (C5-C7)cycloalkyl;
R2 is hydrogen, (C1-C4)alkyl optionally substituted with various defined substituents, or monocyclic (C5-C7)-cycloalkyl; or
R1 and R2 can be joined to form together with the attached nitrogen atom, a saturated heterocyclic ring having 4 to 6 carbon atoms and up to one additional hetero nitrogen, oxygen or sulfur atom.
新型 2-硝基-5-(4-三
氟甲基苯氧基)-N-取代苯甲酰胺(可选含有额外的环取代基)、含有这些化合物的除草组合物以及使用这些新型化合物防治杂草(尤其是农作物区的杂草)的方法。
这些新型化合物的
化学式如下
式中
X 是氢、卤素、(Ct-C4)烷基、
氰基或三
氟甲基;
Y 是氢或卤素
R1 是氢、羟基、(Ct-C4)烷氧基、任选被各种定义的取代基取代的(C1-C4)烷基或单环 (C5-C7)环烷基;
R2 是氢、任选被各种定义的取代基取代的 (C1-C4) 烷基或单环 (C5-C7) 环烷基;或
R1 和 R2 可以连接起来,与所附的氮原子一起形成一个具有 4 至 6 个碳原子和最多一个额外杂氮、氧或
硫原子的饱和杂环。