Etherified fluorescein compounds

Details Etherified fluorescein compounds Etherified fluorescein compounds

1989-11-14

1991-10-08

Raymond, Richard L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

503221, C07D49310

Patent

active

050555952

ABSTRACT:
Etherified fluorescein compounds of the general formula ##STR1## in which X.sub.1 is alkyl having 4 to 12 carbon atoms or cycloalkyl and X.sub.2 is alkyl which is unsubstituted or substituted by halogen, hydroxyl, cyano or lower alkoxy, or cycloalkyl, the rings A and B, independently of one another, are unsubstituted or substituted by halogen, lower alkyl or lower alkoxy, and the ring D is unsubstituted or substituted by halogen, nitro, lower alkyl, lower alkoxy, lower alkylthio, lower alkoxycarbonyl, amino, mono-lower alkylamino or di-lower alkylamino, with the exception that X.sub.1 and X.sub.2 are not at the same time n-butyl.
These novel lactone compounds are particularly suitable for use a color formers in pressure-sensitive or heat-sensitive recording materials and they produce intense yellow, orange or rose-pink colorations.

REFERENCES:
patent: 4800148 (1989-01-01), Harada et al.
patent: 4880730 (1989-11-01), Sato et al.
Chem. Abstr., 109:29995, Harada et al. (1988).
Sato, Chemical Abstracts, vol. 108 (1988), 177032m.
Sato et al., Chemical Abstracts, vol. 112 (1990), 108413g.
Anzai et al., Chemical Abstracts, vol. 11 (1989), 2444389.

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