Chromenoindole compounds

Details Chromenoindole compounds Chromenoindole compounds

C - Chemistry, Metallurgy

07

D

42/1, 260/298.5

C07D 491/04 (2006.01) B41M 5/136 (2006.01) G03G 5/06 (2006.01)

Patent

CA 1083576

Abstract of the Disclosure A chromenoindole compound of the formula (1) Image wherein R1 and R2 independently of one another represent hydrogen, alkyl which has at most 12 carbon atoms and is unsub- stituted or substituted by halogen, hydroxyl, cyano or lower alkoxy; cycloalkyl, phenyl, benzyl, or phenyl or benzyl which are substituted by halogen, lower alkyl or lower alkoxy, Q is hydrogen, lower alkyl, phenyl, benzyl or the groups of the formulae (1a) or (1b) Image Image or (1b) 1a X and X' each represent hydrogen, halogen, lower alkyl or lower alkoxy, Y represents hydrogen, alkyl of 1 to 12 carbon atoms, phenyl or benzyl and the rings A and B independently of one another are unsubsti- tuted or substituted by halogen, nitro, lower alkyl, lower alkoxy, phenoxy, amino or amino substituted by lower alkyl, phenyl or benzyl; these compounds are particularly useful as colour formers which give intense red to blue colour shades of excellent light fastness when they are brought into contact with an electron acceptor.

279735

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