| 摘要 |
Pyrido[2,3-d]pyridazin-5-one and pyrido[2,3-d]pyridazin-5-thione derivatives of general formula (I):epresent hydrogen, optionally halogenated alkyl, alkenyl or alkynyl, optionally substituted heterocycle or a group -[CR41R42]n-(phenyl)-(R3)q; R2 represents halogen, optionally halogenated alkyl, alkenyl or alkynyl, CN; -CO2R4; -S(O)rR4; -NO2; -NR41R42; -OH; -COR4, -S(O)rR5, -CO2R5, -OR5; -CONR41R42, -OSO2R5, -OSO2R6, -OCH2R5, -N(R41)COR6, -N(R41)SO2R5, -N(R41)SO2R6, -SO2NR41R42, optionally substituted phenyl, alkoxy or haloalkoxy; X represents oxygen or sulphur; R3 represents halogen, optionally halogenated alkyl, alkenyl, alkoxy, alkynyl, -OH, -S(O)rR4, -CO2R4, COR4, -CN, -NO2, -NR41R42, -OR5; -CONR41R42, -OSO2R5, -OSO2R6, -OCH2R5, -N(R41)COR6, -N(R41)SO2R5, -N(R41)SO2R6 or -SO2NR41R42; R4 represents a hydrogen atom or optionally halogenated C1-6 alkyl; R41 and R42, which may be the same or different, each represents a hydrogen atom or optionally halogenated C1-4alkyl; R5 represents a phenyl group optionally substituted by from one to five groups selected from halogen, nitro, cyano, R4 and -OR4; m represents zero or an integer from one to three; n represents zero, one or two; where n is two, the groups -(CR41R42)- may be the same or different; q represents zero or an integer from one to five; r represents zero, one or two; with the proviso that when m represents zero R and R1 do not simultaneously represent hydrogen; and agriculturally acceptable salts thereof are useful as herbicides.
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