Herbicidally active compounds of the formula ##STR1## in which .sup.1 represents a hydrogen or chlorine atom, R.sup.2 represents a hydrogen atom, a cyano group, an optionally substituted radical selected from alkyl, aryl, alkanoyl, benzoyl, alkoxycarbonyl, alkenoxycarbonyl, alkinoxycarbonyl, aralkoxycarbonyl and aryloxycarbonyl, or a radical of the general formula --COOM, in which M represents a hydrogen atom, one equivalent of an alkali metal ion or alkaline earth metal ion or optionally substituted ammonium, and R.sup.3 represents a cyano group or a radical of the general formula ##STR2## wherein Y represent an oxygen or sulphur atom or an imino (NH) or alkylimino (Nalkyl) group, R.sup.4 and R.sup.5 independently of each other represent a hydrogen atom or a methyl group, n is 0 or 1 and Z represents an optionally substituted radical. Novel intermediates therefor are also shown.
式为##STR1##的除草活性化合物,其中.sup.1表示氢原子或
氯原子,R.sup.2表示氢原子、
氰基、从烷基、芳基、烷酰基、苯甲酰基、烷氧羰基、烯氧羰基、烷氧羰基、芳基烷氧羰基和芳基氧羰基中选择的可选择取代基,或者是一般式--COOM的基团,其中M表示氢原子、一个碱
金属离子或碱土
金属离子或可选择取代的
铵离子的一个当量,R.sup.3表示
氰基或一般式##STR2##的基团,其中Y表示氧原子或
硫原子或
亚胺基(NH)或烷基
亚胺基(Nalkyl)基团,R.sup.4和R.sup.5各自独立地表示氢原子或甲基基团,n为0或1,Z表示可选择取代的基团。同时还显示了新的中间体。