| 摘要 |
Compounds of the formula (1) <IMAGE> (1) in which X denotes a sulfur atom or the group <IMAGE> in which R denotes a hydrogen atom, an alkylene-C1-C4-alkoxy-C1-C6- or alkyl-C1-C6- group, each of which can be substituted by hydroxyl, sulfo, carboxyl or cyano groups, R1 denotes a hydrogen atom or an alkyl-C1-C6-group which can be substituted by -SO3M or COOM groups (where M denotes an H, Li, Na, K or Ca atom), hydroxyl, amino, methylamino, acetylamino, alkyl-C1-C4-sulfonylamino, methoxy, ethoxy, beta -hydroxyethylsulfonyl, phenyl, monosulfophenyl, disulfophenyl, or 4-[ beta -hydroxyethylsulfonyl]-2-sulfophenyl groups, or represents a phenyl or naphthyl group, each of which can be substituted by -SO3M or COOM groups (where M denotes an H, Li, Na, K or Ca atom), alkyl-C1-C4-, alkoxy-C1-C4-, amino, methylamino, alkyl-C1-C4-sulfonylamino or acetylamino groups, and R2 is hydrogen or oxygen, and process for their preparation by reacting compounds of the formula (2) <IMAGE> (2) in which Y denotes a chlorine or bromine atom, with a compound of the formula (3) H-X-R1 (1) in which X and R1 have the stated meanings, at between 20 DEG and 90 DEG C. in a solvent which is suitable in respect of the reactants of the formulae (2) and (3) and in the presence of an acid-binding agent to give compounds of the formula (4) <IMAGE> (4) in which X and R1 have the stated meanings, and if desired using these compounds in a manner known per se to compounds of the formula (1) where R2=H.
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