Indolizinetrimethine dyes

US5338848A · kind A · utility

Assignee

• BASF SE

Inventors

• Michael Acker · Ludwigshafen am Rhein, DE
• Bernhard Albert · Monsheim, DE
• Michael Schmitt · Worms, DE

Key dates

• Filing date: Jul 20, 1993
• Grant date: Aug 16, 1994
• Expiry date: Jul 20, 2013

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S430/146
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

Indolizinetrimethine dyes useful for laser-optical recording media have the formula ##STR1## where the variables are defined as follows: R.sup.1 is C.sub.1 -C.sub.22 -alkyl which may be substituted by halogen, hydroxyl, C.sub.1 -C.sub.6 -alkoxy, benzyloxy, C.sub.1 -C.sub.6 -alkanoyl, C.sub.1 -C.sub.6 -alkoxycarbonyl or phenyl, C.sub.3 -C.sub.7 -cycloalkyl, which may be substituted by halogen, C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxy, or phenyl which may be substituted by halogen, hydroxyl, cyano, C.sub.1 -C.sub.6 -alkyl, C.sub.1 -C.sub.6 -alkoxy, carboxyl, C.sub.1 -C.sub.6 -alkoxycarbonyl or hydroxysulfonyl, PA1 R.sup.2 has one of the meanings of R.sup.1, except than the carbon chain of C.sub.1 -C.sub.22 -alkyl may be interrupted by from one to five oxygen atoms in ether function, PA1 R.sup.3 is hydrogen, halogen or C.sub.1 -C.sub.6 -alkyl, PA1 Z is --O-- or --NH--, and PA1 An.sup..crclbar. is one equivalent of an acid anion.