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AssigneeHoechst Aktiengesellschaft
InventorsJoachim W. Otten, deceased, by Ursula Otten, heir, by Anna G. Rudolph nee Otten, heir, by Fritz Meininger
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Dihalogenotriazinylamino-naphthol compounds of th formula (1) ##STR1## in which the radicals X each mean fluorine, chlorine or bromine, R is hydrogen or alkyl of 1 to 4 C-atoms, M is hydrogen or the equivalent of a metal, and Z is hydrogen or a group of the formula --SO.sub.3 M with M having the abovementioned meaning, are prepared in water as reaction medium by reaction of an aminonaphthol compound of the formula (2) ##STR2## in which R, M and Z have the abovementioned meanings with a cyanuric halide compound of the formula (3) ##STR3## in which the radicals X have the abovementioned meanings, at pH 5 or smaller than 5 by introducing the aminonaphthol compound of the formula (2) in solid, undissolved form into the reaction, and carrying out the reaction in suspension.
In a process for the preparation of a dihalogenotriazinylamino-naphthol compound of formula (1) ##STR8## in which each X is fluorine, chlorine or bromine, R is hydrogen or alkyl of 1-4 C-atoms, M is hydrogen or the equivalent of a metal and Z is hydrogen or a group of the formula --SO.sub.3 M with M defined above, comprising reacting an aminonaphthol compound of formula (2) ##STR9## in which R, M and Z are defined as above, with M in formula (2) preferably being hydrogen, with a cyanuric halide compound of the formula (3) ##STR10## in which X is defined as above, in water as reaction medium at a pH of 5 or smaller than 5, the improvement consisting in introducing the aminonaphthol compound of formula (2) in solid, undissolved form into the reaction and carrying out the reaction in suspension.
Dependencies are inferred from the claim text.