Indolenine derivatives as dyes

Details Indolenine derivatives as dyes Indolenine derivatives as dyes

1989-03-28

1992-04-21

Rizzo, Nicholas S.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548491, 548494, 548509, 548510, 548511, C07D20904, C07D20958

Patent

active

051069903

ABSTRACT:
The present invention relates to a dye represented by formula (I): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6, which may be the same or different, each represents a C.sub.1 -C.sub.5 alkyl group or a C.sub.1 -C.sub.5 alkyl group having a substituent selected from the group consisting of a sulfonic group, carboxyl group and hydroxyl group, and Z.sup.1 and Z.sup.2 each represents a group of non-metallic atoms necessary for the formation of a benzo-condensed of naphtho-condensed ring, or a benzo-condensed or naphtho-condensed ring having a substituent selected from the group consisting of a sulfonic group, a carboxyl group, an hydroxyl group, a halogen atom, a cyano group, an amino group and a C.sub.1 -C.sub.5 alkyl group connected to the ring directly or through a divalent connection group, with a proviso that R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, Z.sup.1 and Z.sup.2 represent those groups which permit the dye molecule to have at least three acid radicals; L represents a methine group of a methine group having a substituent selected from the group consisting of a C.sub.1 -C.sub.5 alkyl group, a C.sub.1 -C.sub.5 alkyl group having a substituent selected from an hydroxyl group, a phenyl group, or a sulfo group, a halogen atom, a phenyl group, a 4-chlorophenyl group, and a C.sub.1 -C.sub.2 alkoxyl group; X represents an anion; and n represents 1 or 2, n being 1 when the dye forms an inner salt.

REFERENCES:
patent: 2895955 (1959-07-01), Heseltine et al.
patent: 4839265 (1989-06-01), Ohno et al.

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