| 摘要 |
Compounds of the formula I <IMAGE> in which R1, R2, R3, R4 and X have the meaning defined in Patent Claim 1, are potent insecticides. They form the active substances of the novel insecticide preparations. They are prepared by reacting a compound of the formula II <IMAGE> with a compound of the formula III R1-N=C=X or with a compound of the formula <IMAGE> and, if appropriate, further reacting the resulting compound, in which R4 equals H, with an R4-halide. |
