| 摘要 |
<p>Compounds of Formula I, and their agriculturally suitable salts, are disclosed which are useful for controlling undesired vegetation wherein R1 is C1-C3 alkyl, C1-C2 haloalkyl, C2-C3 alkenyl, cyclopropyl or NR?3R4;R2 is C¿1-C4 alkyl, C1-C3 haloalkyl, C2-C4 alkenyl, C2-C3 haloalkenyl, C2-C4 alkynyl, cyclopropyl, halocyclopropyl, C2-C3 alkoxyalkyl, C2-C4 alkylcarbonyl, C2-C4 alkoxycarbonyl, Cl or Br; or R2 is phenyl optionally substituted with 1 to 2 substituents independently selected from halogen, C¿1?-C3 alkyl and C1-C2 alkoxy;R?3¿ is H or C¿1?-C2 alkyl; and R?4 is C¿1-C3 alkyl or C1-C2 alkoxy;provided that when R1 is CF¿3? then R?2¿ is other than CH¿2?OCH3, when R?1¿ is N(CH¿3?)2 then R?2¿ is other than CH¿3?, and when R?1¿ is CH¿2?CH3 then R?2¿ is other than 2-fluorophenyl.Also disclosed are compositions containing the compounds of Formula I and a method for controlling undesired vegetation which involves contacting the vegetation or its environment with an effective amount of a compound of Formula I.</p> |
