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Diazotized aryl amines were coupled with 2-aminothiazoles 1 and 2 to give the corresponding thiazolylazo dyes 3 and 4, respectively. 2-Amino-5-arylazothiazoles 5 reacted with chloroacetyl chloride to afford the chloro-acetamide derivatives 6 which further reacted with 2-mercaptobenzothiazole to furnish a new series of 5-arylazothiazolyl dyes 7. The azo structure of the dyes (rather than the tautomeric...
Diazotized aryl amines were coupled with 2-aminothiazole derivatives to give 5-arylazo-2-aminothiazoles, which on reaction with different reagents such as acetic anhydride and benzoyl chloride yielded the corresponding 2-(N-acetylamino)-5-arylazothiazole and 2-(N-benzoyl-amino)-5-arylazothiazole derivatives. These dyes were applied to polyester as disperse dyes and their fastness properties were evaluated...
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