Bathochromic azo dyes derived from 2-aminothiophenes and 2-amino

Details Bathochromic azo dyes derived from 2-aminothiophenes and 2-amino Bathochromic azo dyes derived from 2-aminothiophenes and 2-amino

1992-09-03

1993-08-10

Higel, Floyd D.

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

Organic compounds

Azo

534775, 534565, 534807, C09B 29039, C09B 29033, C09B 2936, D06P 118

Patent

active

052350479

ABSTRACT:
Provided are certain bathochromic azo dyes which are prepared by reacting 2-aminothiphenes or 2-aminothiazoles, which contain a primary amino group, with 2-chloro-3-negatively-substituted maleimides. These compounds are then diazotized and coupled with azo components, for example, anilines, 1,2,3,4-tetrahydroquinolines, 2,3-dihydroindiles, and 3,4-dihydro-2H-1,4-benzoxazines to form blue-cyan azo dyes.

REFERENCES:
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patent: 4524123 (1985-06-01), Schenk et al.
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patent: 4720493 (1988-01-01), Kawakita
patent: 4841036 (1989-06-01), Imahori et al.
Weaver and Shuttleworth, Dyes and Pigments, pp. 81-121, (1982).
Martin, et al., J. Org. Chem., 26, 2032 (1961).
Wiley, et al., J. Am. Chem. Soc. 90, 1385-8, (1958).

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