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23 records (took 0.021 seconds)

    12.
    发明专利
    未知

    公开(公告)号：DE19810669A1

    公开(公告)日：1999-09-16

    申请号：DE19810669

    申请日：1998-03-12

    Applicant: BASF AG

    Inventor： KIEFER MATTHIAS ,  SIEGEL WOLFGANG ,  THERRE JOERG ,  PAHL MELANIE ,  AQUILA WERNER ,  SCHAEFER-LUEDERSSEN ULRICH

    IPC: C07C29/56 ,  C07C29/80 ,  C07C33/02 ,  C07C33/03 ,  C07C29/58 ,  C07C33/025 ,  C07C29/74

    Abstract: Continuous production of dimethyl vinyl carbinol (DMVC) comprises reaction of prenol with an aqueous solution of a protonic acid in the bottom or upper part of a rectification column while distilling off the DMVC as an azeotropic mixture with water under specified conditions. Continuous production of dimethyl vinyl carbinol (DMVC) by reaction of prenol with an aqueous solution of a protonic acid in the bottom or upper part of a rectification column while distilling off the DMVC as an azeotropic mixture with water is performed in such a way that (a) the amount of liquid two-phase mixture formed during the reaction is minimized, (b) the DMVC is distilled off with a reflux ratio of at least 2, and (c) the reaction volume (V in ml) and/or the amount of prenol added per hour (P in ml/hour) and/or the proton concentration in the reaction mixture (C in moles/liter) is such that VC/P = 0.001-1 h.mol/l.

    15.
    发明专利
    未知

    公开(公告)号：DE50108012D1

    公开(公告)日：2005-12-15

    申请号：DE50108012

    申请日：2001-07-04

    Applicant: BASF AG

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

    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.

    Method for the production of trioxime derivatives
    16.
    发明专利
    Method for the production of trioxime derivatives 未知

    公开(公告)号：AU6912001A

    公开(公告)日：2002-01-14

    申请号：AU6912001

    申请日：2001-07-04

    Applicant: BASF AG

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

    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.

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