| 摘要 |
The present invention relates to a process for preparing for preparing [sic] trioxime derivatives of the formula I in which the substituents R1 and R2 can be identical or different and can in each case be cyano, alkyl, haloalkyl and cycloalkyl and R3 and R4 can be identical or different and can in each case be alkyl, haloalkyl, cycloalkyl, alkylcarbonyl and arylalkyl, by the following reaction steps in water without isolation of the intermediates: A) nitrosation of 1,3-diketones of the formula II to give monooximes of the formula III, B) oximation of III with hydroxylamine derivatives of the formula IVH2N-OR3' IVin which R3' is hydrogen or a group R3 to give bisoximes of the formula V, C) alkylation of V with alkylating agents or acylation of V with acylating agents to give compounds of the formula VI and D) subsequent oximation of VI with hydroxylamine to give compounds of the formula I.
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