Novel sulfonylureas and sulfonylthioureas, and method of use thereof as herbicides and/or growth regulators

摘要

The invention relates to novel sulfonylureas of the formula I <IMAGE> (I) wherein R1 is hydrogen or C1-C5 alkyl, R2 and R3, each independently of the other, are hydrogen, C1-C5 alkyl, C1-C5 alkoxy, C1-C5 alkylthio, C1-C5 haloalkyl, halogen, C1-C5 haloalkylthio, C1-C4 alkylamino, C1-C4 dialkylamino, an alkoxyalkyl group or alkoxyalkoxy group, each containing not more than 6 carbon atoms, Z is oxygen or sulfur, E is -CH= or -N=, and Q is an unsubstituted or substituted 6-membered heterocyclic radical containing 2 to 3 nitrogen atoms and bound through a carbon atom, and the salts thereof. A process for the preparation of the novel compounds and the use thereof are also described. The compounds of formula I can be used in the form of agriculturally useful compositions for controlling weeds and/or for selectively influencing plant growth.