Process for preparing derivatives of halomethylbenzoyl cyanides

    公开(公告)号:CZ287198B6

    公开(公告)日:2000-10-11

    申请号:CZ146797

    申请日:1995-11-14

    Applicant: BASF AG

    Abstract: In the present invention there is disclosed a process for preparing derivatives of halomethylbenzoyl cyanide of the general formula I Ph-CO-CN (I), in which Ph represents a phenyl group being substituted with a chloromethyl or bromomethyl group and optionally having another or up to four substituents being inert during reaction, from halomethylbenzoyl chlorides of the general formula II Ph-CO-Cl (II), wherein Ph is as defined above. The preparation process is characterized by reacting halomethylbenzoyl chloride of the general formula II, in which Ph is as defined above with the compound releasing cyanide in the presence of a Lewis acid, optionally in an inert organic solvent or diluent, whereupon the obtained product is isolated. The proposed preparation process is readily feasible in industry and the product is obtained in high yield and extreme purity.

    PROCESS FOR PREPARING OXIMETHERS
    4.
    发明专利

    公开(公告)号:CZ160997A3

    公开(公告)日:1998-06-17

    申请号:CZ160997

    申请日:1995-11-21

    Applicant: BASF AG

    Abstract: PCT No. PCT/EP95/04580 Sec. 371 Date May 20, 1997 Sec. 102(e) Date May 20, 1997 PCT Filed Nov. 21, 1995 PCT Pub. No. WO96/16932 PCT Pub. Date Jun. 6, 1996A process for preparing oxime ethers of the general formula I I where R1 is a C-organic radical, R2 is hydrogen, alkoxy, cyano, nitro, SOR4, SO2R4, CO2-alkyl, P(O)(OR4)2 or a C-organic radical, and R3 and R4 are unsubstituted or substituted C1-C6-alkyl, entails converting an oxime of the general formula II II where the substituents R1 and R2 have the abovementioned meanings, in the presence or absence of an organic diluent, with a base into the corresponding salt, and reacting the latter with a dialkyl carbonate of the general formula III III where R3 has the abovementioned meanings.

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