| 摘要 |
3-(4-Cyanophenyl)uracils of the formula IwhereinA is hydrogen, methyl or amino;Y is oxygen or sulfur;R<1 >is hydrogen or halogen;R<2 >is hydrogen, halogen, alkyl, haloalkyl, alkylthio, alkylsulfenyl or alkylsulfonyl;R<3 >is hydrogen, halogen or alkyl;R<4 >is hydrogen, haloalkyl; or unsubstituted or substituted alkyl, cycloalkyl, alkenyl, alkynyl, alkylcarbonyl, alkenylcarbonyl, alkynylcarbonyl or alkylsulfonyl,methods and intermediates for their manufacture, and their use as herbicides or for the desiccation or defoliation of plants.
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