Chromenoindole compounds

Details Chromenoindole compounds Chromenoindole compounds

1977-05-20

1978-10-31

Tovar, Jose

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

26029358, 544 81, 544142, 106288Q, C07D49104

Patent

active

041234391

ABSTRACT:
A chromenoindole compound of the formula ##STR1## wherein R.sub.1 and R.sub.2 independently of one another represent hydrogen, alkyl which has at most 12 carbon atoms and is unsubstituted 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, or R.sub.1 and R.sub.2, together with the nitrogen atom which links them, represent a 5-membered or 6-membered heterocyclic radical, Q is hydrogen, lower alkyl, phenyl, benzyl or the groups of the formulae (1a) or (1b) ##STR2## 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 unsubstituted 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.

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