| 摘要 |
Compounds of formula (I) wherein: R<1> is hydrogen, alkyl, alkenyl or alkynyl, any of which may optionally be substituted; R<2> is alkyl, alkenyl or alkynyl, any of which may optionally be substituted, or OR<5> or SOmR<5>; R<3> is H, halogen, cyano, optionally substituted alkyl, alkenyl or alkynyl or OR<5> or CO2R<5>; R<4> is H, alkyl, alkenyl or alkynyl, any of which may optionally be substituted, halogen, cyano, nitro, CO2R<5>, OR<5>, NR<5>R<6>, NR<5>SO2R<6>, OSO2R<5> or OmSR<5>R<6>R<7>; R<5>, R<6> and R<7> are each independently H or alkyl, alkenyl or alkynyl, any of which may optionally be substituted; Y is halogen or cyano; each X is independently halogen, cyano, nitro, hydroxy, alkyl, alkoxy, alkylthio, alkoxyalkyl, SOmalkyl, CONR<8>R<9> or heterocyclyl or, alternatively, two X groups together or an X group and R<4> may form a further ring; m is 0, 1 or 2; n is 0, 1 or 2; R<8> and R<9> are each independently hydrogen or lower alkyl; are active as herbicides. |
