Binary azulenesquaric acid dyes, their intermediates and optical recording medium

US5169975A · kind A · utility

Assignee

• BASF SE

Inventors

• Michael Schmitt · Worms, DE
• Bernhard Albert · Monsheim, DE
• Sibylle Brosius · Ludwigshafen, DE
• Klaus D. Schomann · Stockach, DE
• Harald Kuppelmaier · Heidelberg, DE

Key dates

• Filing date: Nov 15, 1991
• Grant date: Dec 8, 1992
• Expiry date: Nov 15, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C2602/30
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Binary azulenesquaric acid dyes of the formula ##STR1## where X is a bridging member, Y is hydrogen, cyano or formula CO--OR.sup.5, CO--NHR.sup.5, OR.sup.5, O--CO--OR.sup.5, NH--CO--R.sup.5, NH--CO--OR.sup.5 or NH--SO.sub.2 --R.sup.5, where R.sup.5 is hydrogen, C.sub.1 -C.sub.12 -alkyl, C.sub.2 -C.sub.12 -alkenyl, C.sub.5 -C.sub.7 -cycloalkyl or unsubstituted or substituted phenyl, L.sup.1 and L.sup.2 are each, independently of one another, a chemical bond or unsubstituted or substituted C.sub.1 -C.sub.12 -alkylene and R.sup.1, R.sup.2, R.sup.3, R.sup.4, Q.sup.1, Q.sup.2, Q.sup.3 and Q.sup.4 are each, independently of one another, hydrogen or unsubstituted or substituted C.sub.1 -C.sub.12 -alkyl, their intermediates and an optical recording medium containing the novel dyes are described.