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A series of alkali-clearable azo disperse dyes containing a fluorosulfonyl group in their structures were synthesised. Various 4-fluorosulfonylanilines which were used as diazo components were prepared from N-acetylsulfanilyl chloride and coupled with corresponding coupling components to give 4-(N,N-diethylamino)-4'-fluorosulfonylazo benzene dyes. Depending on the various substituents present in the...
Unsymmetrical and symmetrical bis(hetaryl)azo dyes were prepared by diazotisation-coupling and oxidation reactions in low to good yields. Their absorption maxima were observed in the range of 427-631 nm, being more bathochromic than the corresponding non-hetarylazo derivatives. No remarkable difference of decomposition temperature in the bis(hetaryl)azo dyes was observed except for the pyridone derivative...
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