| abstract |
Sulfonylurea derivatives of formulan n wherein J is a pyrazole, thiophene or pyridine residue of defined structure; W is O or S; R 1 is H or CH 3 ; A is a mono- or bicyclic heterocyclic residue, e.g. pyrimidin-2-yl or triazinyl; nand their agriculturally suitable salts, exhibit potent herbicidal activity. Some also exhibit a plant growth regulant action.n The novel compounds may be made e.g. by reacting an appropriate sulfonyl isocyanate or isothiocyanate of formula JS0 2 NCW with an appropriate aminoheterocycle HNR 1 A. |