申请人:May & Baker Limited
公开号:US05114461A1
公开(公告)日:1992-05-19
A 2-benzoylcyclic-1,3-dione derivative of the formula: ##STR1## wherein X represents methylene, oxygen, sulphur or --NR.sup.4 --, Y represents --C(R.sup.5) (R.sup.6)-- or oxygen, R.sup.1 represents hydrogen or alkyl optionally substituted by halogen or represents cycloalkyl, R.sup.2 represents hydrogen or R.sup.7 or R.sup.1 and R.sup.2 together represent alkylene, R.sup.3 represents halogen, hydroxy, carboxy, nitro, cyano or amino or carbamoyl (which may be substituted by one or two alkyl groups), alkoxycarbonyl, alkanoyl, or alkanoylamino, R, RO, RS, RSO or RSO.sub.2 in which R represents alkyl optionally substituted by halogen, R.sup.4 represents hydrogen or alkyl or alkoxycarbonyl, R.sup.5 represents hydrogen or alkyl or alkoxycarbonyl, R.sup.6 represents hydrogen or alkyl, R.sup.7 represents alkyl which may be substituted by halogen or alkylthio or by a group (R.sup.8).sub.n -phenyl-S-, or represents cycloalkyl or tetrahydrothiapyran-3-yl or represents a group (R.sup.8).sub.n -phenyl- in which R.sup.8 represents a halogen, hydroxy, carboxy, nitro or cyano, or amino or carbamoyl (which may be substituted by one or two alkyl groups), alkoxycarbonyl or alkanoyl or alkanoylamino or R, RO, RS, RSO or RSO.sub.2 in which R represents alkyl which is optionally substituted by halogen, m is zero or 1 to 5 and n is zero or 1 to 5, provided that when X represents methylene, and Y represents --C(R.sup.5) (R.sup.6)--then R.sup.1 and R.sup.2 do nmot simultaneously represent hydrogen or alkyl and salts thereof are useful as herbicides.
公式为##STR1##的2-苯甲酰环-1,3-二酮衍生物,其中X代表亚甲基、氧、硫或--NR.sup.4 --,Y代表--C(R.sup.5) (R.sup.6)--或氧,R.sup.1代表氢或烷基,可以选择地被卤素取代,或代表环烷基,R.sup.2代表氢或R.sup.7,或R.sup.1和R.sup.2一起代表烷基,R.sup.3代表卤素、羟基、羧基、硝基、氰基或氨基或羰基(可能被一个或两个烷基取代),烷氧羰基、烷酰基或烷酰氨基,R、RO、RS、RSO或RSO.sub.2中的R代表烷基,可以选择地被卤素取代,R.sup.4代表氢或烷基或烷氧羰基,R.sup.5代表氢或烷基或烷氧羰基,R.sup.6代表氢或烷基,R.sup.7代表烷基,可以被卤素或烷硫基取代,或者由一个基团(R.sup.8).sub.n -苯基-S-取代,或代表环烷基或四氢噻吩-3-基,或代表一个基团(R.sup.8).sub.n -苯基-其中R.sup.8代表卤素、羟基、羧基、硝基或氰基,或氨基或羰基(可能被一个或两个烷基取代),烷氧羰基或烷酰基或烷酰氨基或R、RO、RS、RSO或RSO.sub.2中的R代表烷基,可以选择地被卤素取代,m为零或1至5,n为零或1至5,但当X代表亚甲基,Y代表--C(R.sup.5) (R.sup.6)--时,R.sup.1和R.sup.2不同时代表氢或烷基,其盐可用作除草剂。