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    • 10. 发明授权
    • Control of weeds with 1-phenyl-4-phosphoranylideneamino-5-halo-6(1H)-pyridazones
    • 用1-苯基-4-亚正膦基氨基-5-卤代-6(1H) - 哒嗪酮控制杂草
    • US3879189A
    • 1975-04-22
    • US46632974
    • 1974-05-02
    • CIBA GEIGY CORP
    • BADER JOERGVOGEL CHRISTIAN
    • C07F9/6509A01N9/36
    • C07F9/650941
    • WHEREIN R1 and R2 independently represent alkoxy, alkenyloxy, alkoxyalkoxy, alkylthio or both together with the phosphorus atom from a five- or six-membered ring containing at least one other hetero atom, R3 is alkoxy, alkenyloxy, alkoxyalkoxy, alkylthio or dialkylamino, R4 and R5 are hydrogen, halogen, lower alkyl, alkoxy or halogenalkyl, X being chlorine or bromine. Preferably the three radicals R1, R2, R3 are identical and represent lower alkoxy and R4 and R5 are hydrogen. There is also provided an agent for the control of weeds comprising the said pyridazone derivatives as active component. The new compounds are especially useful as selective herbicides in cultivated crops.
      The invention is concerned with new pyridazone derivatives of formula
    • 本发明涉及式WHERE R1的新的哒唑衍生物,R 1和R 2独立地表示烷氧基,链烯氧基,烷氧基烷氧基,烷硫基或两者与含有至少一个其它杂原子的五元或六元环的磷原子,R3是烷氧基 ,烯氧基,烷氧基烷氧基,烷硫基或二烷基氨基,R4和R5是氢,卤素,低级烷基,烷氧基或卤代烷基,X是氯或溴。 优选地,三个基团R 1,R 2,R 3相同并且表示低级烷氧基,并且R 4和R 5是氢。 还提供了用于控制杂草的试剂,其包含所述哒嗪衍生物作为活性成分。 新化合物特别适用于栽培作物中的选择性除草剂。