Azo compounds deriving from 3-amino-4-lower carboalkoxy-benzoic acid-4'-phenoxy anilides and 2-hydroxy-3-naphthoic acid-4'-benzoylamino anilides
AssigneeHoechst Aktiengesellschaft
InventorsKlaus Hunger, Friedrich Wilhelm Weingarten
Life of this patent
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Abstract
Diazotation of 3-amino-4-carboalkoxy-benzoic acid (4'-phenoxy)-anilides which may be halogenated in said phenoxy nucleus and coupling on 2-hydroxy-3-naphthoic acid-(4'-benzoylamino)-anilides which may be further substituted in said anilide nucleus by halogen, lower alkyl or lower alkoxy, yields azo compounds which are valuable pigments of clear shades and high fastness to migration, light and weather.
Claims10
A compound of the formula ##STR10## in which R is methyl or ethyl, X stands for equal or different halogen atoms, Y.sub.1 and Y.sub.2, which are equal or different, are hydrogen, chlorine, bromine, methyl, ethyl, methoxy or ethoxy and n is zero or an integer from 1 to 4.
Dependencies are inferred from the claim text.