公开(公告)号：BR0112167A

公开(公告)日：2003-05-06

申请号：BR0112167

申请日：2001-07-04

Applicant: BASF AG

Inventor： KRAMER ANDREAS ,  KIEFER MATTHIAS ,  HENNINGSEN MICHAEL ,  SIEGEL WOLFGANG ,  DER JOCHEN SCHR

IPC: C07B61/00 ,  C07C249/06 ,  C07C249/08 ,  C07C251/40 ,  C07C251/58 ,  C07C251/60 ,  C07C49/12

Abstract: The present invention relates to a process for preparing trioxime derivatives of the formula I in which the substituents R 1 and R 2 are identical or different and each is cyano, alkyl, haloalkyl or cycloalkyl, and R 3 and R 4 are identical or different and each is alkyl, haloalkyl, cycloalkyl, alkylcarbonyl or 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 IV H 2 N-OR 3' IV in which R 3' is hydrogen or a group R 3 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.