申请人:DUPHAR INTERNATIONAL RESEARCH B.V
公开号:EP0079635A1
公开(公告)日:1983-05-25
The invention relates to new diphenyl ethers of th, wherein general formula
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;
R, 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 Rs 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.
本发明涉及th的新二苯醚,其中通式为
Ar 是苯基或吡啶基,这些基团被 1、2 或 3 个取代基取代,取代基可选自卤素原子、氰基、硝基、具有 1-6 个碳原子的任选卤代烷基、烷氧基和烷硫基、具有 1-4 个碳原子的烷基磺酰基和具有 1-4 个碳原子的烷酰基;
n 为 1 或 2;
R 和 R2 相同或不同,代表氢原子或具有 1-4 个碳原子的烷基;
R3 是氢原子、具有 1-4 个碳原子并可选择被具有 2-5 个碳原子的烷氧羰基取代 的烷基或烯基;或
R2 和 R3 共同形成一个具有 2-5 个碳原子的烯基:以及
R4 和 Rs 相同或不同,代表具有 1-6 个碳原子的烷基;或
R4 和 R5 共同形成一个具有 2 或 3 个碳原子的亚烷基。
这些化合物具有除草活性。在加工成组合物后,这些化合物可用于控制农业和园艺作物中的有害植物或叶片干燥,每公顷的用量为 0.01 至 5 千克活性物质。