The present invention provides herbicidal-N-(3-amino 2,4-dinitro-6-trifluoromethylphenyl)-pyrrolidones having the formula: ##STR1## where X is oxygen or sulfur, and R, R.sub.1 and R.sub.2 are selected from among H or lower alkyl, of up to 4 carbon atoms. The compounds of this invention are prepared by reacting a 2,4-dihalo-3,5-dinitrobenzotrifluoride with an amine, followed by condensation of the amino intermediate with the alkali metal salt of a pyrrolidone. The N-(substituted-phenyl)-pyrrolidones described herein show good herbicidal activity, particularly pre-emergence activity against Japanese millet and crabgrass.
本发明提供具有以下结构式的除草-N-(3-
氨基2,4-二硝基-6-三
氟甲基苯基)-
吡咯烷酮:##STR1## 其中X是氧或
硫,R、R.sub.1和R.sub.2从H或低碳链烷基中选取,碳原子数不超过4。本发明的化合物是通过将2,4-二卤-3,5-
二硝基苯三
氟甲基乙酰胺与胺反应,然后将
氨基中间体与
吡咯烷酮的碱
金属盐缩合得到的。本文所描述的N-(取代苯基)-
吡咯烷酮表现出良好的除草活性,特别是对日本稷和狗尾草的预出苗活性。