Diaminopyridine azo dyes having acyloxy radicals substituted on the diaminopyridine

Abstract

Abstract Compounds of the general formula ##STR1## where D is a radical of the formula ##STR2## and one of the two radicals L 1 and L 2 is unsubstituted amino and the other the radical ##STR3## where R 1 is hydrogen, C 1 -C 4 -alkyl, C 1 -C 4 -alkoxy-C 2 -C 4 -alkyl or C 1 -C 8 -acyloxy-C 2 -C 4 -alkyl, R 2 is C 2 -C 10 -alkylene or C 2 -C 10 -alkylene is interrupted by oxygen, T is C 1 -C 8 -alkanoyl which is unsubstituted or is substituted by chlorine or methoxy, B 1 is C 1 -C 4 -alkyl or benzyl or phenyl, which are each unsubstituted or are each substituted by methyl, methoxy or chlorine, B 2 is B 1 , hydrogen, halogen, cyano or C 1 -C 5 -alkoxycarbonyl, X 1 is hydrogen, nitro, cyano, C 1 -C 9 -alkoxycarbonyl, C 1 -C 9 -mono- or -dialkylaminocarbonyl, trifluoromethyl, methylsulfonyl or ethylsulfonyl, X 2 is nitro or C 1 -C 5 -alkoxycarbonyl, X 3 is X 2 , cyano or formyl, Y is hydrogen, chlorine, bromine, methyl, methoxy or ethoxy and Z is hydrogen, chlorine, bromine, cyano or C 1 -C 9 -alkoxycarbonyl which is unsubstituted or is substituted by C 1 -C 4 -alkoxy, and one or more of the substituents X 1 , Y and Z is different from hydrogen, are disclosed. The dyes of the present invention may be used in dyeing synthetic polyester.

Inventors

• 👤 Johannes Dehnert
• 👤 Gunther Lamm
• 👤 Hermann Loeffler

Bibliographic Details