| 摘要 |
<p>Herbicidal diphenyl ether hydroxylamines The present invention relates to herbicidal and plant growth regulating diphenyl ether diazoamines of formula I (I) wherein R1 is hydrogen or a C1-C6alkyl, C3-C6alkenyl or C3-C6alkynyl radical which may be unsubstituted or substituted by halogen, cyano, nitro, C1-C4alkoxy, C1-C4alkylthio or di(C1-C4)alkylamino, R2 is a C1-C6alkyl, C3-C6alkenyl or C3-C6alkynyl radical which may be unsubstituted or substituted as indicated for the alkyl radical R1, or R1 and R2, together with the nitrogen and the oxygen atom, also form a saturated or partially saturated 5- or 6-membered heterocycle which may contain a further nitrogen atom and/or may be fused to a benzene ring and may be substituted by C1-C2alkyl or halogen, X is chlorine or the trifluoromethyl group and X1 is hydrogen or chlorine. These compounds are suitable for selectively controlling weeds in crops of useful plants such as cereals, maize, rice or soybeans. They are effective at lower rates of application, are rapidly degraded and are particularly effective for postemergence treatment.</p> |
