| abstract |
Novel substituted tetrahydrothiopyran-2,4-dione herbicides of the formula <IMAGE> in which R1 is hydrogen, alkyl, alkenyl, alkinyl, alkoxyalkyl, alkylthioalkyl, halogenoalkyl, cycloalkyl or optionally substituted aryl, R2 is alkyl, alkenyl, alkinyl, alkoxyalkyl, alkylthioalkyl, halogenoalkyl, halogenoalkenyl, alkoxycarbonylalkyl, alkoximinoalkyl, optionally substituted aralkyl or optionally substituted heterocyclylalkyl, and R3 and R4 each independently is hydrogen, alkyl, alkoxyalkyl, alkylthioalkyl, cycloalkyl, optionally substituted aryl, optionally substituted aryloxyalkyl or optionally substituted aralkyl, or metal salts thereof. |