Quinoline-4-carboxylic acid derivatives

US5071987A · kind A · utility

Assignee

• BASF SE

Inventors

• Friedrich-Wilhelm Raulfs · Ludwigshafen, DE
• Udo Mayer · Bischofswerda, DE

Key dates

• Filing date: Feb 2, 1990
• Grant date: Dec 10, 1991
• Expiry date: Feb 2, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D491/04
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Quinoline-4-carboxylic acids derivatives are useful as dye-forming components for pressure- and heat-sensitive recording materials and have of the general formula I ##STR1## where one of R.sup.1, R.sup.2 and R.sup.3 is hydrogen while the other two are each independently of each other hydrogen, fluorine, chlorine, bromine, linear or branched C.sub.1 -C.sub.5 -alkyl, hydroxyl, C.sub.1 -C.sub.10 -alkoxy, which may be interrupted in the alkyl by 1 or 2 oxygen atoms, or is ##STR2## R.sup.7 is hydrogen, methyl or ethyl and R.sup.8 is C.sub.1 -C.sub.4 -alkanoyl, benzoyl, p-chlorobenzoyl, C.sub.1 -C.sub.6 -alkyl, benzyl or p-chlorobenzyl, or PA1 R.sup.1 and R.sup.2 together are a fused-on benzene ring, PA1 R.sup.2 and R.sup.3 together are unsubstituted or C.sub.1 -C.sub.4 -alkyl-substituted methylenedioxy or ethylenedioxy, PA1 R.sup.4 is hydroxyl, C.sub.1 -C.sub.10 -alkoxy, which may be interrupted by 1-4 oxygen atoms, or unsubstituted or chlorine-substituted phenyl-C.sub.1 -C.sub.2 -alkoxy, PA1 R.sup.5 is hydroxyl or C.sub.1 -C.sub.10 -alkoxy, although ortho-disposed R.sup.4 and R.sup.5 together may also be methylenedioxy or 1,2-ethylenedioxy, PA1 R.sup.6 is hydrogen, hydroxyl, methoxy, e…