| abstract |
Heterocyclic 2-alkoxyphenoxysulfonylureas and the use thereof as herbicides or plant growth regulators Compounds of tine formula I or salts thereof where R1 is ethyl, propyl or isopropyl, R2 is halogen, NO2, CF3, CN, alkyl, alkoxy, alkylthio or alkoxycarbonyl, n is 0, 1, 2 or 3, Y is O or S, R3 is hydrogen, alkyl, alkenyl, alkynyl or alkoxy; R4 is a heterocyclic radical of the formulae E is CH or N; G is O or CH2, R5 and R6 are hydrogen, halogen, or are alkyl, alkoxy or alkylthio, which are optionally substituted by halogen, alkoxy or alkylthio, or are -NR12R13, -OCHR7-CO2R12, (C3-C6)cycloalkyl, (C3-C5)alkenyl, (C2-C4)-alkynyl, (C3-C5)alkenyloxy or (C3-C5) alkynyloxy; R7 is hydrogen or alkyl, R8 is alkyl, -CHF2 or -CH2CF3; R9 and R10 are hydrogen, alkyl, alkoxy or halogen; R11 is hydrogen, alkyl, -CHF2 or CH2CF3; R12 and R13 independently of one another are hydrogen, alkyl, alkenyl or alkynyl, possess outstanding herbicidal and plant growth-regulating properties. |