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US 5,502,173 AGranted
Process for the preparation of a substituted 2-amino-1-sulphonaphthalene
AssigneeBayer Aktiengesellschaft
InventorsHorst Ja/ ger, Siegbert Arnold, Richard Sommer
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Abstract
2,4,6-trifluoro-5-chloro-pyrimidine and the aqueous solution of a salt of 2-amino-5-aminomethyl-naphthalene-1-sulphonic acid are simultaneously metered into a reactor in approximately equimolar amounts and afford a valuable intermediate for the preparation of high-purity dyes.
Claims11
Process for the preparation of a compound of the formula ##STR9## in which Z=a radical of a fiber-reactive pyrimidine or aminotriazine radical component which contains at least one reactive fluorine atom, and
- Me=Li, Na, K or H characterised in that a fluorine-containing reactive component of the formula
- Z=F (2) (F=fluorine)
- and an aqueous solution of an alkali metal salt, of 2-amino-5-amino-methyl-naphthalene-1-sulphonic acid (3) is metered into a reactor, the reactive component (2) and the sulphonic acid (3) being metered simultaneously into the reactor with reaction wherein the pH is 8 to 11 at the beginning and during the reaction.
Dependencies are inferred from the claim text.