HERBICIDAL PYRIMIDINES

摘要

Compounds of Formula I, and their N-oxides and agriculturally suitable salts, are disclosed which are useful for controlling undesired vegetation wherein R<1> is cyclopropyl optionally substituted with 1-5 R<5>, isopropyl optionally substituted with 1-5 R<6>, or phenyl optionally substituted with 1-3 R<7>; R<2> is ((O)jC(R<15>)(R<16>))kR; R is CO2H or a herbicidally effective derivative of CO2H; R<3> is halogen, cyano, nitro, OR<20>, SR<21> or N(R<22>)R<23>; R<4> is -N(R<24>)R<25> or -NO2; j is 0 or 1; and k is 0 or 1; provided that when k is 0, then j is 0; and R<5>, R<6>, R<7>, R<15>, R<16>, R<20>, R<21>, R<22>, R<23>, R<24> and R<25> are as defined in the disclosure. Also disclosed are compositions comprising 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. Also disclosed are compositions comprising a compound of Formula I and at least one additional active ingredient selected from the group consisting of an other herbicide and a herbicide safener.