Pyridone compounds and the preparation of disulfonated pyridone compounds

US5380859A · kind A · utility

Assignee

• BASF SE

Inventors

• Gunther Lamm · Haßloch, DE
• Helmut Beichelt · Neustadt, DE
• Ortwin Schaffer · Ludwigshafen, DE

Key dates

• Filing date: Jul 16, 1993
• Grant date: Jan 10, 1995
• Expiry date: Jul 16, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B62/513
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

There are described benzophenoneazo dyes of the formula ##STR1## where the ring A can be benzofused and a benzofused ring A can be overbridged, PA1 m is 1 or 2, PA1 K is the radical of a coupling component, PA1 Y is hydrogen or arylazo, PA1 one of the two radicals X.sup.1 and X.sup.2 is hydrogen and the other is hydroxysulfonyl, PA1 R.sup.1, R.sup.2 and R.sup.3 are independently of the others hydrogen, halogen, C.sub.1 -C.sub.12 -alkyl, cyclohexyl, phenyl, 2-hydroxyethylsulfonyl or C.sub.1 -C.sub.4 -alkoxy or, when m is 1 and Y is hydrogen, one of these substituents can also be the radical of the formula ##STR2## where L.sup.1 is a chemical bond or a bridge member, and PA1 X.sup.1, X.sup.2, R.sup.4, K and the ring A are each as defined above, and PA1 R.sup.4 is hydrogen, halogen or C.sub.1 -C.sub.4 -alkoxy, with the proviso that there is at least one water-solubilizing group in the molecule, novel pyridone compounds, a process for preparing disulfonated pyridone compounds, and the use of the novel dyes for dyeing natural or synthetic substrates.