C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
260/243, 260/259
C07D 403/12 (2006.01) A01N 47/36 (2006.01) C07D 491/044 (2006.01) C07D 521/00 (2006.01)
Patent
CA 1220203
Title HERBICIDAL SULFONAMIDES Abstract of the Disclosure This invention relates to a novel class of sulfonamides and their use as herbicides and plant growth regulants. The sulphonamides are of the formula: Image wherein A is a five- or six-membered aromatic heterocycle, a five- or six-membered dihydroaromatic heterocycle or a six- membered tetrahydroaromatic heterocycle ) which contains 1-4 heteroatoms selected from 0-1 oxygen atoms, 0-1 sulfur atoms, and/or 0-4 nitrogen atoms; the hetero- cycles may be optionally substituted with 1-4 CH3, 1-2 OCH3, 0-1 SCH3, ; 0-1 Cl, 0-1 N(CH3)2, or 0-1 CN groups; R is H or CH3; R1 is H, F, Cl, Br, CH3, OCH3, CF3 or NO2; R2 is H or CH3; R3 is H or CH3; R4 is Image Image X is CH3, OCH3 or Cl; Y is H, CH3, C2H5, OCH3, OC2H5, CH2OCH3, NH2, NHCH3 or N(CH3)2; Y1 is H, Cl, CH3 or OCH3; and Z is CH, CCH3 or N provided that (1) the bond between N-R and A is attached to a nitrogen or carbon atom of A; (2) when A is a thiophene or furan ring, the bond between NR and A is not at the 2- or 5-position of the hetero- cycle; and (3) when X is Cl, then Z is CH and Y is CH3, OCH3, NH2, NHCH3 or N(CH3)2.
409736
E. I. Du Pont de Nemours And Company
Mccallum Brooks & Co.
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