Sulfonylurea derivatives, their preparation and their use

Details Sulfonylurea derivatives, their preparation and their use Sulfonylurea derivatives, their preparation and their use

C - Chemistry, Metallurgy

07

D

C07D 239/46 (2006.01) A01N 47/36 (2006.01) C07D 251/42 (2006.01) C07D 521/00 (2006.01)

Patent

CA 2101952

The invention concerns sulfonyl urea derivatives of formula (I), wherein R1 stands for optionally substituted alkyl or phenyl; alkenyl or propargyl; alkylamino or dialkylamino; R2 stands for hydrogen, halogen, optionally halogen-substituted methyl, methoxy or ethoxy, an alklylsulfonyl group, nitro or cyano; R3 stands for difluoromethoxy, trifluoromethoxy, brom- odifluoromethoxy, chlorodifluoromethoxy or fluorine; R4 stands for halogen, optionally halogen-substituted methyl, ethyl, methoxy or ethoxy or the methylamino or dimethylamino group; R5 stands for hydrogen, alkyl, alkenyl or an alkinyl; Z stands for CH or N, provided that a) if R3 stands for the difluoromethoxy group, R1 does not stand for a di(alkyl)amino group, R2 does not stand for an alkylsulfonyl group, and R4 does not stand for a methyl or methoxy group, b) if R3 stands for a fluorine atom and Z stands for nitrogen, R4 does not stand for an alkylamino group. The invention also concerns their salts. The sulfonyl urea derivatives can be used as herbicides.

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