| 摘要 |
<p>The invention relates to new diphenyl ethers of the general formula <CHEM> wherein Ar is a phenyl or pyridyl group, which groups are substituted with 1,2 or 3 substituents, selected from the group consisting of a halogen atom, a cyano group, a nitro group, an optionally halogenated alkyl, alkoxy and alkylthio group having 1-6 carbon atoms, an alkylsulphonyl group having 1-4 carbon atoms, and an alkanoyl group having 1-4 carbon atoms; n is 1 or 2; R1 and R2 are equal or different and represent hydrogen atoms or alkyl groups having 1-4 carbon atoms; R3 is a hydrogen atom, an alkyl or alkenyl group having 1-4 carbon atoms and optionally substituted with an alkoxycarbonyl group with 2-5 carbon atoms; or R2 and R3 together form an alkylene group with 2-5 carbon atoms, and R4 and R5 are equal or different and represent alkyl groups having 1-6 carbon atoms, or R4 and R5 together form an alkylene group having 2 or 3 carbon atoms. The compounds have a herbicidal activity. After having been processed to compositions, the compounds may be used for controlling undesired plants or for leaf-desiccation in agricultural and horticultural crop in a dosage from 0.01 to 5 kg of active substance per hectare.</p> |
