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    Process for the preparation of N-substituted pyrazoles
    31.
    发明专利
    Process for the preparation of N-substituted pyrazoles 未知

    公开(公告)号：DE4318960A1

    公开(公告)日：1994-12-15

    申请号：DE4318960

    申请日：1993-06-08

    Applicant: BASF AG

    Inventor： EBEL KLAUS DR ,  SCHROEDER JUERGEN DR ,  GROENING CARSTEN DR ,  DOCKNER TONI DR ,  MERKLE HANS RUPERT DR

    IPC: C07D231/12 ,  C07D521/00

    Abstract: Process for the preparation of N-substituted pyrazoles of the formula I in which R is C1- to C12-alkyl or C7- to C20-phenylalkyl and R , R and R independently of one another are hydrogen, C1- to C12-alkyl or C7- to C20-phenylalkyl by reaction of pyrazoles of the formula II in which R , R and R have the abovementioned meanings, with compounds of the formula III R - O - R in which R has the abovementioned meanings and R is hydrogen or R , in the presence of a catalyst at temperatures from 200 to 550 DEG C and pressures from 0.001 to 50 bar by employing a heterogeneous catalyst as the catalyst.

    33.
    发明专利
    未知

    公开(公告)号：DE3780920D1

    公开(公告)日：1992-09-10

    申请号：DE3780920

    申请日：1987-12-03

    Applicant: BASF AG

    Inventor： DOCKNER TONI DR ,  KEMPE UWE DR ,  KOEHLER HERMANN DR

    IPC: C07D233/92 ,  C07D233/94

    Abstract: Prodn. of 4(5)-nitroimidazole -5(4)-carboxylic acids (I) is effected by reacting an imidazole-4(5) -carboxylic acid (II) with a mixt. of H2SO4 and HNO3 at a temp. of at least 80 deg. C, provided that the reaction mixt. contains no more than 5 wt.% H2O at the start of the reaction. (I) and (II) are opt. 2-substd. by an aliphatic, cycloaliphatic, araliphatic or aromatic gp.. The HNO3:(II) molar ratio is 1-4:1. The HNO3:H2SO4 molar ratio is 0.1-1:1. The reaction is effected at 100-160 deg. C using a mixt. of 80-100% HNO3 and oleum, so that the reaction mixt. contains 0-1% H2O.

    34.
    发明专利
    未知

    公开(公告)号：DE3581453D1

    公开(公告)日：1991-02-28

    申请号：DE3581453

    申请日：1985-07-16

    Applicant: BASF AG

    Inventor： KEMPE UWE DR ,  DOCKNER TONI DR ,  SCHLICK ROLF

    IPC: C07D233/60 ,  C07D233/66 ,  C07D233/90

    Abstract: Imidazole-4(5)-monocarboxylic acids and their salts or betaines are prepared by reacting an imidazole with carbon dioxide and an alkali metal carbonate, an alkali metal bicarbonate and/or an alkali metal hydroxide at from 140 DEG to 230 DEG C. and under from 2 to 350 bar and, if desired, then reacting the product with an acid. The imidazole-4(5)-monocarboxylic acids which can be prepared by the process of the invention are useful starting materials for the preparation of dyes, crop protection agents and drugs.

    Process for the preparation of ketones
    37.
    发明专利
    Process for the preparation of ketones 未知

    公开(公告)号：DE3825873A1

    公开(公告)日：1990-02-01

    申请号：DE3825873

    申请日：1988-07-29

    Applicant: BASF AG

    Inventor： SCHOMMER CHARLES DR ,  EBEL KLAUS DR ,  DOCKNER TONI DR ,  IRGANG MATTHIAS DR ,  HOELDERICH WOLFGANG DR

    IPC: B01J23/04 ,  C07C45/48 ,  C07D213/50

    Abstract: Process for the preparation of ketones of the general formula I in which R and R independently of one another denote alkyl, cycloalkyl, arylalkyl, aryl or hetaryl, where at least one of the radicals R or R have attached to the alpha carbon atom at least one hydrogen atom, by reacting two carboxylic acids of the general formulae (IIa/IIb), R -COOH (IIa) and R -COOH (IIb) in the gas phase in the presence of a catalyst, the catalysts having an active component of titanium dioxide whose specific surface area is greater than 10 m /g.

    39.
    发明专利
    未知

    公开(公告)号：DE3804545A1

    公开(公告)日：1989-08-24

    申请号：DE3804545

    申请日：1988-02-13

    Applicant: BASF AG

    Inventor： KEMPE UWE DR ,  DOCKNER TONI DR ,  KOEHLER HERMANN DR

    IPC: C07D233/90 ,  C07D235/24

    Abstract: Process for the preparation of 4,5-disubstituted imidazole- 2-carboxylic acids by reacting 4,5-disubstituted imidazoles with carbon dioxide at elevated pressure and at temperatures of 150 to 300 DEG C in the presence of a base, and novel 4,5-disubstituted imidazole-2-carboxylic acids.

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