| abstract |
Compounds or the formula below are disclosed as selecntive herbicides: n nwherein A is O or S; halo is chloro, bromo or fluoro; R¹ nand R² are the same or different radicals selected from hydrongen or (C₁-C₄) alkyl; X is hydrogen or halo; X¹ is methylene. O nor S; Z is carboxy, alkoxyalkoxy, alkoxycarbonyl, alkoxycarbonnylalkoxycarbonyl, alkoxyalkoxycarbonyl, acyloxy, acylalkoxy, ncyanoalkoxy, alkylthioalkoxy, alkoxycarbonylalkoxy, alkoxycarnbonylalkenyloxy, a 5- to 6-membered heterocyclic, formylalkonxy, haloalkoxy, mononuclear arylcarbonylalkoxy, oxiranylalkonxy, amino, monoalkyl amino, dialkylamino, hydrazino, monocalnkylhydrazino, dialkylhydrazino, acylamino, alkoxyamino, alkonxycarbonylamino, mono- or dialkylcarbonylamino, N-alkyl-N-alnkoxyalkylaminocarbonylamino, haloalkylcarbonylamino, N-alnkylsulfonylaminocarbonyl, N-alkylsulfonylamino, monoalkenylnamino, dialkenylamino, monoalkynylamino, dialkynylamino, nN-alkyl-N-alkenylamino, or N-alkyl-N-alkynylamino; R is hydrongen or (C₁-C₄)alkyl and R³ and R⁴ are the same or different and nare selected from hydrogen, (C₁-C₄)-alkyl, (C₃-C₅)alkenyl or n(C₃-C₅)alkynyl. |