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    METHOD FOR THE PRODUCTION OF TRIOXIME DERIVATIVES
    42.
    发明专利
    METHOD FOR THE PRODUCTION OF TRIOXIME DERIVATIVES 未知

    公开(公告)号：HU0301141A2

    公开(公告)日：2003-08-28

    申请号：HU0301141

    申请日：2001-07-04

    Applicant: BASF AG

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

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

    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.

    44.
    发明专利
    未知

    公开(公告)号：DE19959053A1

    公开(公告)日：2001-06-13

    申请号：DE19959053

    申请日：1999-12-07

    Applicant: BASF AG

    Inventor： KRAMER ANDREAS ,  KNOLL CHRISTIAN ,  MELDER JOHANN-PETER ,  SIEGEL WOLFGANG ,  KAIBEL GERD

    IPC: C07C45/72 ,  C07B61/00 ,  C07C45/62 ,  C07C45/73 ,  C07C45/74 ,  C07C45/87 ,  C07C49/203

    Abstract: Preparation of alpha , beta -unsaturated ketones (I) comprises reacting a ketone (II) under reflux in molar excess in the presence of a catalyst system consisting of dimethylamine or pyrrolidine and a carboxylic acid containing at least 2 C atoms, with an aldehyde (III) which is added slowly added to the reaction mixture. Preparation of alpha , beta -unsaturated ketones of formula (I) comprises reacting a ketone of formula (II) under reflux in molar excess in the presence of a catalyst system consisting of dimethylamine or pyrrolidine and a carboxylic acid containing at least 2 C atoms, with an aldehyde of formula (III) which is added slowly added to the reaction mixture. R = branched or unbranched cyclic or acyclic saturated or unsaturated aliphatic or araliphatic radical having 4-20 C atoms; and R = branched or unbranched cyclic or acyclic saturated or unsaturated aliphatic or araliphatic radical having 1-10 C atoms.

    45.
    发明专利
    未知

    公开(公告)号：DE19929602A1

    公开(公告)日：2001-01-04

    申请号：DE19929602

    申请日：1999-06-28

    Applicant: BASF AG

    Inventor： KRAMER ANDREAS ,  MELDER JOHANN-PETER ,  RUETTER HEINZ ,  RIEWE GUENTER ,  SIEGEL WOLFGANG ,  WEYER HANS-JUERGEN

    IPC: C07D233/32 ,  C07D233/34 ,  C07D239/10

    Abstract: Formic acid-free N-alkyl-N'-methyl-alkylene ureas (I) are obtained from reaction mixtures obtained from the corresponding alkylene urea (II) and formaldehyde in presence of formic acid by supplying the mixture to the upper part of a distillation column, carrying out distillation under specific pressure and temperature conditions and recovering HCOOH-free (I) from the lower part of the column. Preparation of formic acid-free N-alkyl-N'-methyl-alkylene ureas of formula (I), by reacting the corresponding alkylene urea of formula (II) with monomeric or polymerized formaldehyde (HCHO) in presence of formic acid (HCOOH), involves supplying the reaction mixture containing (I) and HCOOH to the upper part of a distillation column, carrying out distillation without further additives and recovering HCOOH-free (I) from the lower part of the column. The pressure is in the upper part of the column is higher than that in the lower part by 10-100 (preferably 20-40) mbars and the temperature in the lower part of the column is higher than that in the upper part by 40-210 (preferably 80-150) degrees C. R1 = H or Me; R2 = H or 1-4C alkyl; x = 0 or 1.

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