This invention relates to 5-substituted-3-phenyl-imidazolidine-2,4-diones, to a process for their preparation and to their use in herbicidal formulations. In particular, this invention relates to 5-substituted-3-phenyl-imidazolidine-2, 4-diones of the formula I ##STR1## in which: p0 X is hydrogen or halogen; p0 R is selected from the group --R.sup.2 or .dbd.CH--R.sup.3 ; p0 R.sup.1 is methyl or ethyl; p0 R.sup.2 is C.sub.1-8 alkyl, C.sub.1-8 haloalkyl, C.sub.3-8 cycloalkyl, C.sub.4-10 cycloalkylalkyl, phenyl, benzyl or substituted benzyl; and R.sup.3 is C.sub.1-8 alkyl, C.sub.3-8 cycloalkyl, phenyl, substituted phenyl, benzyl, substituted benzyl, styryl, or a heterocyclic group of 3 to 10 ring atoms.
本发明涉及5-取代-3-苯基-
咪唑啉-2,4-二酮,以及它们的制备方法和在
除草剂配方中的使用。特别是,本发明涉及式I的5-取代-3-苯基-
咪唑啉-2,4-二酮:##STR1## 其中:p0 X为氢或卤素;p0 R选自--R.sup.2或.dbd.CH--R.sup.3的群;p0 R.sup.1为甲基或乙基;p0 R.sup.2为C.sub.1-8烷基,C.sub.1-8卤代烷基,C.sub.3-8环烷基,C.sub.4-10环烷基烷基,苯基,苄基或取代苄基;R.sup.3为C.sub.1-8烷基,C.sub.3-8环烷基,苯基,取代苯基,苄基,取代苄基,
苯乙烯基或3至10个环原子的杂环基。