Fluoran colorants for recording systems

Details Fluoran colorants for recording systems Fluoran colorants for recording systems

1984-10-12

1986-07-29

Hoke, Veronica P.

Organic compounds -- part of the class 532-570 series

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

546 15, 548407, 549224, 544129, 544141, 544143, C07D40712, C07D49310, C07D41300, C07D31178, C07D40512

Patent

active

046032029

ABSTRACT:
Fluorans of the formula (I) ##STR1## where R.sup.1 is hydrogen or methyl, R.sup.2 is hydrogen or unsubstituted or substituted alkyl, R.sup.3 is hydrogen, unsubstituted or substituted alkyl, cycloalkyl or unsubstituted or substituted phenyl, or ##STR2## is a 5-membered or 6-membered saturated heterocyclic radical, R.sup.4 and R.sup.5 independently of one another are each hydrogen, alkyl, alkoxy or halogen, R.sup.6 is hydrogen, halogen, alkyl, alkoxy, phenylalkoxy, phenoxy, phenyl or unsubstituted or substituted amino, or is pyrrolidinyl, piperidinyl or morpholinyl, R.sup.7 is hydrogen, alkyl or halogen, R.sup.8 is C.sub.1 -C.sub.5 -alkyl, and the radicals R.sup.4 and R.sup.5 and/or R.sup.6 and R.sup.7 together may furthermore each be a --CH.dbd.CH--CH.dbd.CH-- bridge, and the fused-on benzo ring may be further substituted, are used for the preparation of pressure-sensitive and heat-sensitive recording materials.

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