申请人:MAY & BAKER LIMITED
公开号:EP0053011A1
公开(公告)日:1982-06-02
Nicotinamide derivatives of the formula:-
(wherein X represents an oxygen or sulphur atom, R1 represents a hydrogen atom or a methyl, ethyl or allyl group, R2 represents a hydrogen, fluorine or chlorine atom, a cyano group or a methyl or ethyl group optionally substituted by one or more fluorine atoms, R3 represents a fluorine, chlorine or bromine atom or a cyano, trifluoromethyl, methoxy, ethoxy, trifluoromethoxy or C1-4 alkanesulphonyl group, one of R4 and R5 represents a hydrogen atom and the other represents a hydrogen, fluorine, chlorine or bromine atom or a cyano, trifluoromethyl, methoxy, ethoxy, trifluoromethoxy or C1-4 alkanesulphonyl group, R6 represents a hydrogen, fluorine or chlorine atom or a cyano or ethynyl group, R7 represents a fluorine or chlorine atom, R8 represents a hydrogen, fluorine, chlorine or bromine atom or a methyl or ethyl group and m represents 0, 1 or 2, with the proviso that when R2 and R6 each represent a hydrogen atom; m represents 0, have been found to possess useful herbicidal properties; herbicidal compositions, methods for controlling the growth of weeds and processes for the preparation of the nicotinamide derivatives are described.
式中的烟酰胺衍
生物:- 其中 X 代表氧原子或
硫原子,R1 代表氢原子或甲基、乙基或烯丙基,R2 代表氢原子、
氟原子或
氯原子、
氰基或任选被一个或多个
氟原子取代的甲基或乙基、R3 代表
氟、
氯或
溴原子或
氰基、三
氟甲基、甲氧基、乙氧基、三
氟甲氧基或 C1-4 烷磺酰基,R4 和 R5 中的一个代表氢原子,另一个代表氢、R6 代表氢原子、
氟原子或
氯原子或
氰基或
乙炔基、R7 代表
氟或
氯原子,R8 代表氢、
氟、
氯或
溴原子或甲基或乙基,m 代表 0、1 或 2,但当 R2 和 R6 各代表一个氢原子时,m 代表 0;m 代表 0 时,具有有用的除草特性;描述了除草组合物、控制杂草生长的方法和制备烟酰胺衍
生物的工艺。