Etherified flourescein compounds

Details Etherified flourescein compounds Etherified flourescein compounds

C - Chemistry, Metallurgy

07

D

42/13, 260/356.1

C07D 493/10 (2006.01) B41M 5/145 (2006.01) B41M 5/327 (2006.01) C09B 57/00 (2006.01)

Patent

CA 2002978

1-17326/+ Etherified fluorescein compounds Abstract Etherified fluorescein compounds of the general formula (1) Image in which X1 is alkyl having 4 to 12 carbon atoms or cycloalkyl and X2 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 halo- gen, 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 X1 and X2 are not at the same time n-butyl. These novel lactone compounds are particularly suitable for use as colour formers in pressure-sensitive or heat-sensitive recording materials and they produce intense yellow, orange or rose-pink colorations.

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