| 摘要 |
<p>Sulfonylurea derivatives of the formula
<CHEM>
wherein
E is CH2 or a single bond;
W is O or S;
R is H or CH3;
R1 is halogen, nitro or a specified organic group;
R2 is an organic substituent;
A is a mono- or bicyclic heterocyclic group, e.g pyrimidinyl or triazinyl;
and their agriculturally suitable salts exhibit potent herbicidal activity. Some also show a plant growth regulant effect.
<??>The novel compounds may be made by a variety of routes, e.g. by reacting an appropriate benzenesulfonyl isocyanate or isothiocyanate with the appropriate heterocyclic amine. </p> |
