Alkyl- and alkenylsulfonylureas which are substituted in the heterocycle, processes for their preparation, and their use as herbicides or plant growth regulators

Abstract From the Canadian patent

Alkyl-and alkenylsulfonylureas which are substituted in the heterocycle, processes for their preparation and, their use as herbicides or plant growth regulators Compounds of they formula I, their stereoisomers or their salts, (see formula I), where in, A denotes >C(R4)2 or >C=C(R5)2; R1 denotes H an, optionally substituted aliphatic or cycloaliphatic radical, furfuryl, tetrahydrofurfuryl or (substituted) phenyl; R2 denotes H, alkyl, alkenyl, alkynyl or alkoxy; R3 denotes a radical of the formulae, (see formula II to IX) X denotes O, S or NR12 and Y denotes O or S possess, excellent herbicidal and plant-growth regulating properties.