中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

31 records (took 0.046 seconds)

    PROCESS FOR THE PREPARATION OF SUBSTANTIALLY PURE PYRAZOLE COMPOUNDS
    21.
    发明专利
    PROCESS FOR THE PREPARATION OF SUBSTANTIALLY PURE PYRAZOLE COMPOUNDS 未知

    公开(公告)号：DE2960705D1

    公开(公告)日：1981-11-19

    申请号：DE2960705

    申请日：1979-11-06

    Applicant: BASF AG

    Inventor： LINHART FRIEDRICH DR ,  EICKEN KARL DR ,  GIRGENSOHN BJOERN DR ,  RICHARZ WINFRIED DR

    IPC: C07D231/12 ,  C07D231/14 ,  C07D231/18 ,  C07D231/20 ,  C07D521/00

    Abstract: 1. A process for the preparation of substantially pure pyrazole compounds of the general formula see diagramm : EP0012216,P9,F1 where R is hydrogen, halogen, alkyl of up to 5 carbon atoms, alkoxy of up to 3 carbon atoms, perhaloalkyl of up to 3 carbon atoms or alkoxyalkyl of up to 5 carbon atoms, R**1 is hydrogen, halogen, alkyl of up to 5 carbon atoms, alkoxy of up to 3 carbon atoms, perhaloalkyl of up to 3 carbon atoms or alkoxyalkyl of up to 5 carbon atoms, R**2 is hydrogen, halogen, alkyl of up to 5 carbon atoms, alkoxy of up to 3 carbon atoms, perhaloalkyl of up to 3 carbon atoms or alkoxyalkyl of up to 5 carbon atoms, or R**2 together with R is an ortholinked alkylene chain of up to 6 carbon atoms which is unsubstituted or substituted by alkyl of up to 4 carbon atoms, X is chlorine or bromine, and R**3 and R**4 are identical or different and each is hydrogen, alkyl, alkoxy, alkylthio, carbalkoxy or perfluoroalkyl, in each case of up to 4 carbon atoms, or halogen, phenyl, cyano or carboxyl, from the corresponding crude products, characterized in that the crude products are treated with 30 to 90% by weight aqueous solutions of strong acids, thereafter the aqueous solution is separated off and diluted with water, and the pure product which hereupon precipitates is separated from the aqueous fluid.

    22.
    发明专利
    未知

    公开(公告)号：DE4217846C1

    公开(公告)日：1993-12-23

    申请号：DE4217846

    申请日：1992-05-29

    Applicant: BASF AG

    Inventor： REISSENWEBER GERNOT DR ,  RICHARZ WINFRIED DR ,  KOOB KNUT DR

    IPC: A01N43/90 ,  C07D487/04

    Abstract: Described is the preparation of 5-dichloroacetyl-3,3,6-trimethyl-9-oxo-1,5-diazabicyclo[4,3,0]nonane (I) by reacting 3,3,6-trimethyl-9-oxo-1,5-diazabicyclo[4,3,0]nonane (II) with dichloroacetyl chloride in the presence of a solvent and a base. The reaction is carried out in a two-phase system comprising a practically water-insoluble solvent and water, and sodium or potassium hydroxide is added as the base in proportion to the amount of dichloroacetyl chloride consumed so that the aqueous phase has a pH of 7 to 9. The solid product formed is then separated off.

Patent Agency Ranking