Bayer Aktiengesellschaft

Dystar Textilfarben Gmbh & Co. Deutschland Kg

Wilfried Hansmann

Hermann Henk

Stefan Ehrenberg

Wolfram Reddig

Frank-Michael Stohr

The disclosed dyes (which are fiber-reactive and are useful for dyeing materials containing OH and/or carboxamide groups) are compounds of the formula (1)

Water-soluble fiber-reactive dyes, processes for their preparation, and

Dyes containing a 5,6-difluoropyrimidin-4-yl radical as fiber-reactive group are useful for dyeing hydroxy- and/or carboxamido-containing material, including fiber material, for example cellulose fibers, wool and polyamide.

Water-soluble fiber-reactive dyes, preparation thereof and use thereof

Process for preparing 2,4,6-trichloropyrimidine, characterized in that, in a first reaction step, barbituric acid is reacted, optionally in the presence of a catalyst, with phosphorus oxychloride and subsequently, in a second reaction step, with phosphorus pentachloride or with reactants forming the latter, in particular phosphorus trichloride and chlorine.

Process for preparing 2,4,6-trichloropyrimidine

Reactive dyestuffs of the formula ##STR1## produce bluish red dyes having excellent fastness properties on hydroxyl- and amido-containing fibre material.

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Leverkusen, Germany

Wilfried Hansmann