| abstract |
Herbicidal sulfonamides, and the preparation and use thereof, the sulfonamides having the general formulan whereinn R, isn R 2 and R 3 are independently hydrogen, fluorine, chlorine, bromine, methyl, methoxy, nitro or trifluoromethyl; W is oxygen or sulfur; X is -NHCH 3 or -N(CH 3 ) 2 ; Z is methyl or methoxy; and A is or N nor its agriculturally suitable salts provided that when R 2 is nitro or trifluoromethyl, R 3 cannot be nitro or trifluoromethyl.n The compounds can be formulated into compositions for agricultural use by conventional means. The compounds are useful for the regulation of plant growth and as herbicides, particularly for controlling volunteer corn in soybeans. They can be prepared by reacting an appropriate 2-aminoheterocycle with an appropriately substituted sulfonyl isocyanate or isothiocyanate. |