Substituted 2-amino-5-maleimido thiophenes and substituted 2-ami

Details Substituted 2-amino-5-maleimido thiophenes and substituted 2-ami Substituted 2-amino-5-maleimido thiophenes and substituted 2-ami

1991-08-19

1993-01-12

Higel, Floyd D.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548195, 548527, 534768, 534775, C07D41704, C07D47104, C07D48704, C09B 31043

Patent

active

051792079

ABSTRACT:
Provided are certain substituted 2-aminothiazoles and 2-aminothiophenes which are useful as red colorants and as intermediates in the synthesis of bathochromic azo dyes. These compounds are prepared by reacting 2-aminothiophenes or 2-aminothiazoles, which contain a primary amino group, with 2-chloro-3-negatively-substituted maleimides. These compounds can be diazotized and coupled with azo components, for example, anilines, 1,2,3,4-tetrahydroquinolines, 2,3-dihydroindoles, and 3,4-dihydro-2H-1,4-benzoxazines to form bathochromic blue-cyan azo dyes.

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