There are presented new diphenyl ether derivatives and a process for preparing the same, the derivatives having a substituent selected from a halogen atom, a trifluoromethyl group and a methoxy group at the 4-position in one phenyl mioety, having optionally also halo-substituents at the 2- and 6-positions, and having a nitro group at the 4'-position and a substituent selected from an unsubstituted or substituted (1,3-dioxorane-4-yl)methoxy group, an unsubstituted or substituted (1,3-dioxa-5-cyclo- hexyloxy) group and an alkyl- or (substituted)amino- sulfonyloxy group at the 3'-position in the other phenyl moiety. In the form of herbicidal compositions they exhibit improved herbicidal effects on various weeds without any adverse phytotoxic effects on crops, e.g. rice seedlings.
本发明提出了新的
二苯醚衍
生物及其制备方法,这些衍
生物在一个苯基的 4 位上具有一个选自卤素原子、三
氟甲基和甲氧基的取代基,在 2 位和 6 位上还可选择具有卤代取代基,在 4'- 位上具有一个硝基和一个选自未取代或取代的(1,3-二氧杂
环戊烷-4-基)甲氧基、一个未取代或取代的(1,3-二氧杂
环戊烷-4-基)甲氧基的取代基、在 4'-位上有一个硝基,在另一个苯基的 3'-位上有一个选自未取代或取代的 (1,3-二氧杂
环戊烷-4-基)甲氧基、未取代或取代的(1,3-二氧杂
环戊烷-5-环己氧基)基团 和烷基或(取代的)
氨基磺酰氧基的取代基。以除草组合物的形式,它们对各种杂草具有更好的除草效果,而不会对作物(如
水稻秧苗)产生任何不利的植物毒性影响。