2-dicarboximidefluorane or 3-dicarboximidefluorane compounds

Details 2-dicarboximidefluorane or 3-dicarboximidefluorane compounds 2-dicarboximidefluorane or 3-dicarboximidefluorane compounds

1990-02-23

1991-11-19

Raymond, Richard L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

544 70, 546 15, C07D49310

Patent

active

050668145

ABSTRACT:
2-Dicarboximidefluorane or 3-dicarboximidefluorane compounds of the formula ##STR1## in which R.sub.1 and R.sub.2 independently of one another are each hydrogen, halogen, lower alkyl or lower alkoxy, one of Z.sub.1 and Z.sub.2 is the dicarboximide group ##STR2## and the other is hydrogen, halogen, lower alkyl or lower alkoxy, W is a radical of a dicarboxylic acid containing at least 2 carbon atoms, X.sub.1 and X.sub.2 are hydrogen, alkyl which is unsubstituted or substituted by halogen, hydroxyl, cyano, tetrahydrofuryl or lower alkoxy, cycloalkyl, or benzyl or phenyl each of which is unsubstituted or substituted by halogen, cyano, nitro, lower alkyl, lower alkoxy, lower alkoxycarbonyl, --NX'X" or -4-NX'X"-phenylamino in which X' and X" independently of one another are hydrogen, lower alkyl, cyclohexyl, benzyl or phenyl, or X.sub.1 and X.sub.2, together with the nitrogen atom linking them, are a five-membered or six-membered heterocyclic radical and in which the ring A is unsubstituted or substituted by halogen, nitro, lower alkyl, lower alkoxy, lower alkylthio, lower alkoxycarbonyl, amino, mono-lower alkylamino or di-lower alkylamino.
These fluorane compounds, which are particularly fast to sublimation, are suitable for use as color formers in pressure-sensitive or heat-sensitive recording materials, and produce intense yellow, orange or red colorations which are fast to light.

REFERENCES:
Zink, Chemical Abstracts, vol. 110 (1989) 145061u.

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