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    CRYSTALLINE MODIFICATION V OF FIPRONIL, PROCESS FOR ITS PREPARATION AND USE TO PREVENT PARASITES ON ANIMALS
    15.
    发明专利
    CRYSTALLINE MODIFICATION V OF FIPRONIL, PROCESS FOR ITS PREPARATION AND USE TO PREVENT PARASITES ON ANIMALS 未知

    公开(公告)号：NZ576592A

    公开(公告)日：2012-06-29

    申请号：NZ57659207

    申请日：2007-11-05

    Applicant: BASF SE

    Inventor： SAXELL HEIDI EMILIA ,  ERK PETER ,  TARANTA CLAUDE ,  KROHL THOMAS ,  COX GERHARD ,  SUKOPP MARTIN ,  DESIRAJU GAUTAM R ,  BANERJEE RAHUL ,  BHATT PRASHANT M

    IPC: A01N47/02 ,  A01N25/00 ,  A01P7/00

    Abstract: Disclosed is solid fipronil (formula I) comprising at least 98% by weight of the crystalline modification V fipronil showing, in an X-ray powder diffractogram recorded using Cu-Ka radiation at 25 degrees C, at least 3 of the following reflexes: (1) 2theta = 10.3 ± 0.2 degrees (2) 2theta = 11.1 ± 0.2 degrees (3) 2theta = 13.0 ± 0.2 degrees (4) 2theta = 16.2 ± 0.2 degrees (5) 2theta = 20.3 ± 0.2 degrees (6) 2theta = 31.5 ± 0.2 degrees and a melting point in the range of 201 to 203 degrees C. Also disclosed is a process for preparing crystalline modification V fipronil comprising the steps of: step i) preparing a solution of a solid form of fipronil being different from the crystalline modification V in a solvent S selected from dimethylsulfoxide having a temperature of 100 degrees C to 150 degrees C or acetonitrile having a temperature of 60 degrees C to 81degrees C; step ii) effecting crystallization of fipronil from the solution; and step iii) isolating the resulting precipitate. Also disclosed is the use of the crystalline modification V fipronil for the control of pests and methods of control of pests such as parasites, insects, arachnids or plant nematodes.

    CRYSTALLINE MODIFICATION OF FIPRONIL
    16.
    发明专利
    CRYSTALLINE MODIFICATION OF FIPRONIL 未知

    公开(公告)号：NZ576639A

    公开(公告)日：2012-03-30

    申请号：NZ57663907

    申请日：2007-11-05

    Applicant: BASF SE

    Inventor： SAXELL HEIDI EMILIA ,  ERK PETER ,  TARANTA CLAUDE ,  KROHL THOMAS ,  COX GERHARD ,  DESIRAJU GAUTAM R ,  BANERJEE RAHUL ,  BHATT PRASHANT M ,  SUKOPP MARTIN ,  SCHERER STEFAN ,  OJALA ANTTI

    IPC: A01N25/00 ,  A01N47/02 ,  A01P7/00

    Abstract: Disclosed is a process for preparing solid fipronil comprising at least 85 percent by weight of the crystalline modification I of fipronil being present in the monoclinic system having the centrosymmetric space group C2/c comprising the steps of: step i) preparing a solution of a solid form of fipronil being different from the crystalline modification I in a solvent S comprising at least one acetonitrile, dimethylsulfoxide, or at least one benzene derivative; step ii) effecting crystallization of fipronil; and step iii) isolating the resulting precipitate wherein, in case the solvent S is pure acetonitrile, the crystallization step ii) is conducted at temperatures below 40 degrees Celsius and in case the solvent S is pure dimethylsulfoxide, the crystallization step ii) is conducted at temperatures below 80 degrees Celsius.

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