Herbicidal compounds of the formula: ##STR1## wherein A represents R.sup.1 R.sup.2 N-- (wherein R.sup.1 represents C.sub.1-8 alkyl or C.sub.2-8 alkenyl or alkynyl unsubstituted or substituted by CN, OH, C.sub.1-6 alkoxy, carboxy, C.sub.2-9 alkoxycarbonyl, aminocarbonyl optionally substituted by C.sub.1-8 alkyl or C.sub.2-8 alkenyl, C.sub.1-8 alkoxyaminocarbonyl, C.sub.1-8 alkanesulphonamidocarbonyl, --C(.dbd.O)Het, where Het represents a nitrogen-containing heterocyclic group, or one or more halogen atoms or R.sup.1 represents C.sub.3-6 cycloalkyl optionally substituted by C.sub.1-4 alkyl and R.sup.2 represents H or R.sup.1, or R.sup.1 represents C.sub.1-4 alkylthio and R.sup.2 represents H, or A represents R.sup.p (R.sup.q)--C.dbd.N-- (wherein R.sup.p represents C.sub.1-4 alkoxy or amino substituted by one or two C.sub.1-4 alkyl groups and R.sup.q represents H or C.sub.1-4 alkyl) or A represents 2-oxo-azetidin-1-yl, 2-oxo-pyrrolidin-1-yl or 2-oxo-piperidin-1-yl optionally substituted by C.sub.1-6 alkyl or A represents open-chain alkenylcarbonylamino and B represents phenyl substituted in the 2- position by F, Cl, Br, NO.sub.2, Me or Et and in the 4- position by F, Cl, Br, C.sub.1-4 (optionally substituted by halogen) or C.sub.2-4 alkenyl and alkynyl and optionally substituted in the 3-, 5- and 6- positions by F, Cl, Br, NO.sub.2, Me or Et, or B represents 2,3-dichlorophenyl, and salts thereof.
式子: ##STR1## 其中 A 代表 R.sup.1 R.sup.2 N-(其中 R.sup.1 代表 C.sub.1-8 烷基或 C.sub.2-8 烯基或炔基,可以未经取代或经过 CN、OH、C.sub.1-6 烷氧基、羧基、C.sub.2-9 烷氧羰基、
氨基羰基取代,该
氨基羰基可以选择性地经过 C.sub.1-8 烷基或 C.sub.2-8 烯基取代,C.sub.1-8 烷氧
氨基羰基,C.sub.1-8 烷基磺酰胺基羰基,-C(.dbd.O)Het,其中 Het 代表含氮杂环基团,或一个或多个卤素原子,或 R.sup.1 代表 C.sub.3-6 环烷基,可以选择性地经过 C.sub.1-4 烷基取代,R.sup.2 代表 H 或 R.sup.1,或 R.sup.1 代表 C.sub.1-4 烷基
硫基,R.sup.2 代表 H,或 A 代表 R.sup.p(R.sup.q)-C.dbd.N-(其中 R.sup.p 代表经过一到两个 C.sub.1-4 烷基取代的 C.sub.1-4 烷氧基或
氨基,R.sup.q 代表 H 或 C.sub.1-4 烷基),或 A 代表 2-氧代-氮杂环丙
氨基、2-氧代-
吡咯烷基或 2-氧代-
哌啶烷基,可以选择性地经过 C.sub.1-6 烷基取代,或 A 代表开链烯基羰基
氨基,B 代表苯基,在 2- 位经过 F、Cl、Br、NO.sub.2、Me 或 Et 取代,在 4- 位经过 F、Cl、Br、C.sub.1-4(可以选择性地经过卤素取代)或 C.sub.2-4 烯基和炔基取代,可以选择性地在 3-、5- 和 6- 位经过 F、Cl、Br、NO.sub.2、Me 或 Et 取代,或 B 代表 2,3-二
氯苯基,以及其盐。