Herbicidal sulfonamides, preparation and use thereof, and compositions containing them
申请人:E.I. DU PONT DE NEMOURS AND COMPANY
公开号:EP0023140A2
公开(公告)日:1981-01-28
Compounds of the general formula
wherein
A is
B is Cl or Br:
R is carboxylic ester, amide, Cl, CF3, N02 or various sulfur containing groups:
R1 is H, halogen, NO2, CH3, OCH, or CF,;
X and Z are independently H, CH3, Bf, Cl, OCH3, CH2CH3, CH2OCH3 or OCH2CH3; and
Y is halogen, CN, NO or various organic groups; and their agriculturally suitable salts; exhibit potent herbicidal activity. Some can also be used to regulate plant growth. The compounds can be made by reacting the appropriately substituted benzenesulfonyl or pyridinesulfonyl isocyanate with the appropriate 2-aminopyrimidine they can be formulated for agricultural use in conventional manner.
Compounds wherein R is carboxyl are of interest as intermediates for the preparation of the compounds (I).
通式如下的化合物
其中
A 是
B 是 Cl 或 Br
R 是羧酸酯、酰胺、Cl、CF3、N02 或各种含硫基团:
R1 是 H、卤素、NO2、CH3、OCH 或 CF;
X 和 Z 独立地为 H、CH3、Bf、Cl、OCH3、CH2CH3、CH2OCH3 或 OCH2CH3;以及
Y 是卤素、CN、NO 或各种有机基团;以及它们在农业上适用的盐;具有强大的除草活性。有些还可用于调节植物生长。这些化合物可以通过适当取代的苯磺酰基或吡啶磺酰基异氰酸酯与适当的 2-氨基嘧啶反应制成,它们可以按常规方式配制成农用产品。
R 为羧基的化合物可作为制备化合物 (I) 的中间体。