Sutfonylurea derivatives of formula:
and their agriculturally suitable salts, wherein:
L is selected from carbocyclic or heterocyclic aromatic groups;
W, is O or S;
R is H or CH,;
A is a pyrimidine ortriazine group bearing an acetylenic substituent;
exhibit potent herbicidal activity. Some also show a plant growth regulant effect.
The compounds may be formulated into compositions for agricultural use in conventional manner. They may be made e.g. by reacting an appropriate sulfonyl isocyanate or isothiocyanate LS02NCW, with an appropriate heterocyclic amine
式中 L 选自碳环或杂环芳香基团;W 为 O 或 S;R 为 H 或 CH;A 为带有
乙炔基取代基的
嘧啶或三嗪基团;具有强效除草活性。 有些化合物还具有植物生长调节作用。 这些化合物可按常规方法配制成农用组合物。 例如,可将适当的磺酰
异氰酸酯或异
硫氰酸酯 LS02NCW 与适当的杂环胺反应制得。