Sulfonylurea derivatives of formula
wherein J is a pyrazole, thiophene or pyridine residue of defined structure;
W is O or S;
R1 is H or CH3;
A is a mono- or bicyclic heterocyclic residue, e.g. pyrimidin-2-yl or triazinyl;
and their agriculturally suitable salts, exhibit potent herbicidal activity. Some also exhibit a plant growth regulant action.
The novel compounds may be made e.g. by reacting an appropriate sulfonyl isocyanate or isothiocyanate of formula JS02NCW with an appropriate aminoheterocycle HNR1A.
式中 J 为
吡唑、
噻吩或
吡啶残基的定义结构;W 为 O 或 S;R1 为 H 或
CH3;A 为单环或双环杂环残基,例如
嘧啶-2-基或三嗪基;及其农业上适用的盐类的磺酰
脲衍
生物具有强效除草活性。 有些还具有植物生长调节作用。 这些新型化合物可通过使式 JS02NCW 的适当磺酰基
异氰酸酯或异
硫氰酸酯与适当的
氨基杂环 HNR1A 反应制成。