Suffonylurea derivatives of formula
wherein L is a substituted homo- or heterocyclic aromatic group;
W3 is 0 or S;
R is H or CH3;
A is a mono- or bicyclic heterocyclic group, e.g. pyrimidinyl or triazinyl;
and their agriculturally suitable salts, exhibit potent herbicidal activity. Many also show a plant growth regulant effect.
The novel compounds may be made e.g. by reacting an appropriate aromatic sulfonylisocyanate or isothiocyanate LSO2NCW3 with the appropriate aminoheterocycle RNHA.
式中 L 为取代的同环或杂环芳香基团;W3 为 0 或 S;R 为 H 或
CH3;A 为单环或双环杂环基团,如
嘧啶基或三嗪基;以及它们在农业上适用的盐类的磺酰
脲衍
生物具有很强的除草活性。 许多还显示出
植物生长调节剂的作用。 这些新型化合物可通过使适当的芳香族磺酰基
异氰酸酯或异
硫氰酸盐 LSO2NCW3 与适当的
氨基杂环 RNHA 反应而制成。