Herbicidal nicotinamide derivatives

Details Herbicidal nicotinamide derivatives Herbicidal nicotinamide derivatives

C - Chemistry, Metallurgy

07

D

260/291.1, 71/8.

C07D 213/78 (2006.01) A01N 43/40 (2006.01) C07D 213/80 (2006.01) C07D 213/82 (2006.01) C07D 213/83 (2006.01)

Patent

CA 1229612

ABSTRACT Nicotinamide derivatives of the formula: Image (I) (wherein X represents an oxyyen or sulphur atom, R1 represents a hydrogen atom ora methyl or ethyl group, R2 represents a hydrogen or fluorine 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, methyl, 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, 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 provisos (i) that when R2 represents a hydrogen atom, R6 represents a hydrogen atom and m represents 0 and (ii) that when R2 represents a fluorine atom, a cyano group or a methyl or ethyl group optionally substituted by one or more fluorine atoms and R6 represents a fluorine or chlorine atom, m represents 0 or 1, 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.

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