Herbicidal sulfonamides, their preparation and their use to...

C - Chemistry – Metallurgy – 07 – D

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260/261, 71/7.9

C07D 239/28 (2006.01) A01N 47/36 (2006.01) C07D 521/00 (2006.01)

Patent

CA 1317954

O.Z. 0050/39190 Herbicidal sulfonamides, their manufacture, and their use for influencing plant growth ABSTRACT OF THE DISCLOSURE: Substituted sulfonylureas of the formula I Image I where R1 is hydrogen, C1-C4-alkyl, C3-C4-alkenyl or alkynyl, C1-C4-haloalkyl, C3-C6-alkoxyalkyl, C4-C6-haloalkoxyalkyl or C5-C6-cycloalkyl, R2 is hydrogen, methyl or ethyl, R3 is hydrogen, halogen, methyl or methoxy, R4 is hydrogen, methyl or methoxy, X is N or C-H, and Hal is fluorine, chlorine or bromine, and alkali metal or alkaline earth metal salts thereof, with the proviso that R1 is not methyl when Hal is chlorine and X is N, a process for the manufacture of sulfonylureas of the formula I and their use as herbicides.

567085

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