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    27.
    发明专利
    未知

    公开(公告)号：DE1265752B

    公开(公告)日：1968-04-11

    申请号：DEB0080671

    申请日：1965-02-24

    Applicant: BASF AG

    Inventor： HAHN DR ERWIN ,  SEEFELDER DR MATTHIAS

    IPC: C07D239/30 ,  C07D277/68 ,  C07D285/08 ,  C09B62/02

    Abstract: Acid chlorides of carboxylic acids of the general formula HOOC-Ar-X-(Cl)n, where Ar is an aryl group, X is a 5- or 6-membered heterocyclic ring which may be fused with Ar, and n is 1 or 2, may be used to prepare reactive dyes. The specified dyes have the formulae (I) (II) (III) AND (IV) ALSO:Aromatic carboxylic acids having the formula HOOC-Ar-X-(Cl)n, where Ar represents an aryl group, X is 5- or 6-membered heterocyclic ring, which may be fused with Ar, and n is 1 or 2, are prepared by heating an aromatic trichloromethyl compound of the formula Cl3C-Ar-X-(Cl)n with concentrated formic acid at 40-120 DEG C. The heterocyclic moiety may be a thiadiazole, thiazole or pyrimidine residue, the aryl moiety a phenyl, biphenyl or naphthyl radical and the fused aryl/heterocyclic moiety a benzimidazole, benzothiazole or quinoline residue. The aryl and heterocyclic nuclei may be further substituted by, e.g., sulphonic or halogen groups. Examples describe the preparation of 3-(m-carboxyphenyl) - 5 - chlorothiadiazole - 1,2,4; 3 - (p - carboxyphenyl) - 5 - chlorothiadiazole-1,2,4; 2 - (m - carboxyphenyl) - 4,6 - dichloropyrimidine; 2 - (p - carboxyphenyl) - 4,6 - dichloropyrimidine; 4 - (p - carboxyphenyl) - 2,6- dichloropyrimidine; and 4 - (m - carboxyphenyl) - 2,6 - dichloropyrimidine. The tricloromethyl starting materials are made by photochemical chlorination of the corresponding methyl compounds.

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