SUBSTITUTED DERIVATIVES OF SULFONYLUREA OR THEIR SALTS USED IN AGRICULTURE AND HERBICIDE AGENT Russian patent published in 1997 - IPC

FIELD: organic chemistry. SUBSTANCE: product: derivatives of sulfonylurea of the formula (I): where R¹ means respectively halogen-substituted alkyl or phenyl; alkenyl or propargyl; alkylamino or dialkylamino; R² means hydrogen, halogen, respectively halogen-substituted methyl, methoxy or ethoxy, alkylsulfonyl-group, nitro or cyano; R³ means difluoromethoxy, trifluoromethoxy, bromodifluoromethoxy, chlorodifluoromethoxy or fluorine; R⁴ means halogen, respectively halogen-substituted methyl, ethyl, methoxy or ethoxy or methyl- or dimethylamino-group; R⁵ means hydrogen, alkyl, alkenyl or alkynyl; Z means CH or N at condition that: a) if R³ means difluoromethoxy-group then R¹ does not mean di-(alkyl)-amino-group; R² does not mean alkylsulfonyl-group, R⁴ does not mean methyl- or methoxy-group; b) if R³ means fluorine atom and Z means N then R⁴ does not mean alkylamino-group, and their salts also. Sulfonylurea derivatives were used as herbicides. EFFECT: improved method of synthesis. 7 cl, 8 tbl