Derivatives of azobarbituric acid or salts or complexes thereof

US4628082A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Manfred Lorenz · Coburg, DE
• Karl H. Schundehutte · Leverkusen, DE

Key dates

• Filing date: May 14, 1985
• Grant date: Dec 9, 1986
• Expiry date: May 14, 2005

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S534/04
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Azobarbituric acid derivatives characterized in that in their free acid form they have the following tautomeric structure are disclosed: ##STR1## The azobarbituric acid derivatives are characterized in that X and Y rings can each carry one or two substituents from the series comprising .dbd.O, .dbd.S, .dbd.NR.sub.7, --NR.sub.6 R.sub.7, --OR.sub.6, --SR.sub.6, --COOR.sub.6, --CN, --CONR.sub.6 R.sub.7, --SO.sub.2 R.sub.8, ##STR2## alkyl, cycloalkyl, aryl and aralkyl, the total number of the endocyclic and exocyclic double bonds for each of the rings X and Y being three. The new azobarbituric acid derivatives are other than those of azobarbituric acid, azouracil and uracil-5-azobarbituric acid and their salts. The compounds are useful as pigments which pigments are useful for pigmented paints, in printing inks, distempers or emulsion paints, inter alia.