| 摘要 |
Compounds having the formula ……RSO2N=@-NHR1 …<CHEM>… R<2> is halogen, nitro or various organic groups;… R<3> is hydrogen, halogen, alkyl or methoxy;… R<4> is halogen, nitro, methyl, alkoxy, carboxylic ester or methylthio;… W is Cl, Br or OR<1><2>, where R<1><2> is various organic groups;… X is CH3 or OCH3;… Y is CH3, alkoxy or substituted alkoxy;… Z is N or CH;… Q is CH2 or O; and… A is CH3 or CH3O;… and their agricultrally acceptable salts, exhibit herbicidal activity. Some may have utility as plant growth modifiers. For these uses the compounds may be formulated into compositions in conventional manner. …<??>The compounds can be prepared e.g. from the corresponding sulfonylurea… ……RSO2NH@NHR<1> (II)… by reaction with Ph3P and CCl4 or CBr4 to obtain a compound (I) wherein W is Cl or Br, and optionally reacting this product with an alkali metal alkoxide to obtain a compound wherein W is OR<1><2>. |
