Organic compounds -- part of the class 532-570 series – Organic compounds – Azo
Patent
1992-12-03
1995-02-21
Higel, Floyd D.
Organic compounds -- part of the class 532-570 series
Organic compounds
Azo
534765, 534786, 534759, 534760, 534761, 534762, 534763, 534764, 534768, 534766, 534793, 548130, 548135, 548161, 548184, 548252, 5483127, 5483151, 5483255, 548235, 544333, C09B 2936, C09B 2300, C09B 2310
Patent
active
053917200
ABSTRACT:
Disclosed is an imidazole azo dye of formula (I), which is useful for image formation and as a filter dye, which has a sharp absorption wave and which is fast to light, heat, air, moisture and chemicals. Also disclosed is a thermal transfer dye-donating material containing imidazole azo dye(s) of formula (I) preferably along with aminopyrazole azo dye(s) of formula (II). The material gives a high-density image with good color reproduction, and the image formed has improved storage stability. ##STR1## In (I), B and C independently represent a hydrogen atom or a substituent capable of being substituted in the imidazole ring; A represents an aryl or heterocyclic group; provided that when B is a hydrogen atom, C is not a hydrogen atom nor an alkyl group having from 1 to 3 carbon atoms; provided that when C is a hydrogen atom, B is not a substituted nor unsubstituted alkyl group; provided that C is not a mercapto group or an alkylthio group; and provided that B is not a carboxyl group.
In (II), D represents a hydrogen atom, or an alkyl, aryl, or heterocyclic group, E represents a substituent capable of being substituted in the pyrazole ring, F represents an aryl or heteroaromatic group, and G and I independently represent a hydrogen atom, or an alkyl, aryl, or heterocyclic group.
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L. M. Anderson et al., "A Mechanistic Study of the Reaction Between Aryldiazonium Ions and Imidazoles", J. Chem. Soc. Perkin Trans. II, (12), (1989) pp. 2055-2058.
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Chemical Abstracts, vol. 90, No. 6, Feb. 5, 1979, Columbus, Ohio, Abstract No. 40182a B. K. Park et al., MO Theoretical Interpretation for Lambda-max of Synthesized Benzeneazo Imidazole Dyes, p. 66, column 1.
Mikoshiba Hisashi
Tateishi Tomomi
Fuji Photo Film Co. , Ltd.
Higel Floyd D.
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