Aromatic disazo dyes and liquid-crystalline materials containing

Details Aromatic disazo dyes and liquid-crystalline materials containing Aromatic disazo dyes and liquid-crystalline materials containing

1985-02-20

1987-05-19

Higel, Floyd D.

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

Organic compounds

Azo

2522991, 25229961, 25229968, 534573, 534752, 534756, 534762, 534764, 534775, 534797, C09B 29036, C09B 3114, C09B 3312, C09K 1922

Patent

active

046670203

ABSTRACT:
Compounds of the formula ##STR1## where X is a 5-membered heterocyclic structure from the oxazole, oxadiazole, thiazole, thiadiazole, imidazole or triazole series, Y is a radical of the formula ##STR2## the rings A, B and C can be further substituted and can be fused to a benzene ring, R.sup.1 and R.sup.2 are each hydrogen or unsubstituted or substituted alkyl, aralkyl or cycloalkyl, or R.sup.1 and R.sup.2 together with the nitrogen are piperidino, pyrrolidino or morpholino, R.sup.3 is hydrogen or unsubstituted or substituted alkyl, cycloalkyl, aralkyl, acyl, alkoxycarbonyl, aryloxycarbonyl or arylsulfonyl, and R.sup.4 is hydrogen, alkyl or cycloalkyl, are particularly useful as dyes in liquid-crystalline media.

REFERENCES:
patent: 4344880 (1982-08-01), Dehnert et al.
patent: 4493532 (1985-01-01), Kaneko et al.

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