Optionally further substituted 5-(2'- or 4'-phenoxyphenylazo)-6-hydroxypyridone-2 compounds containing a cationic group in the 1-position

US4256635A · kind A · utility

Assignee

• Sandoz AG · CH

Inventor

• Manfred Greve · Dornach, CH

Key dates

• Filing date: Feb 1, 1979
• Grant date: Mar 17, 1981
• Expiry date: Feb 1, 1999

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B44/08
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Compounds of the formula ##STR1## wherein R.sub.1 is hydrogen, cyano, --COR.sub.4 or --CONR.sub.5 R.sub.6, PA1 wherein PA2 R.sub.4 is C.sub.1-4 alkyl or phenyl, PA2 R.sub.5 is hydrogen, C.sub.1-4 alkyl or phenyl, and PA2 R.sub.6 is hydrogen or primary or secondary C.sub.1-4 alkyl, PA1 R.sub.2 is hydrogen, C.sub.1-4 alkyl, phenyl, benzyl or phenylethyl, PA1 R.sub.3 is a straight or branched C.sub.2-8 alkylene or alkenylene bridge, optionally interrupted by one oxygen atom, PA1 R is a radical ##STR2## wherein each R.sub.13, independently, is hydrogen or halogen, and either Q has a first significance selected from the groups of the formulae ##STR3## wherein R.sub.7 and R.sub.8, independently, are C.sub.1-8 alkyl, PA1 R.sub.9 is C.sub.1-4 alkyl, unsubstituted or mono-substituted by halogen, C.sub.1-4 alkoxy, C.sub.1-4 alkylcarbonyl or benzoyl, PA1 R.sub.10 is hydrogen or C.sub.1-4 alkyl, and A.sup..crclbar. is an anion, or Q has a second significance selected from the groups of the formulae ##STR4## wherein R.sub.7, R.sub.8, R.sub.10 and A.sup..crclbar. are as defined above, and PA1 R.sub.11 is benzyl, unsubstituted or substituted in on the phenyl ring by up to three substituents selec…