Compounds of the formula
Nherein W is 0 or S;
Q is an aromatic tricyclic group;
R is H or CH3; and
A is a mono-or bicyclic heterocyclic group, e. g. pyrimidyl or triazinyl;
and their agriculturally suitable salts, exhibit herbicidal activity. Some also exhibit a plant growth regulant effect.
The novel compounds may be made by a variety of synthetic routes, e. g. by reacting an appropriate sulfonyl isocyanate or isothiocyanate with an appropriate heterocyclic amine.
                            式中的化合物
其中 W 为 0 或 S;
Q 是芳香族
三环基团
R 是 H 或 
CH3;以及
A 是单环或双环杂环基团,如
嘧啶基或三嗪基;
及其农业上适用的盐类具有除草活性。有些还具有植物生长调节作用。
这些新型化合物可以通过多种合成途径制成,例如,将适当的磺酰
异氰酸酯或异
硫氰酸酯与适当的杂环胺反应。