Synthesis and Dyeing Performance of Quinoline Based Bisazo Acid Dyes

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Sixteen 2-[(4-R-azophenyl) azo]-5-[(2,6-dimethyl-4-quinolinyl) amino] phenol bisazo acid dyes (Va-p) were prepared by coupling diazotized 2-[(4-aminophenyl) azo]-5-[(2,6-dimethyl-4-quinolinyl) amino] phenol (IV) with various coupling components (Ra-p). The compound (II) was coupled with diazotized p-aminoacetanilide giving compound (III) which on hydrolysis gave compound (IV). The compounds (Va-p) were characterized by elemental and spectral analyses and their dyeing performance on nylon, wool and silk fabrics was assessed.

Dyeing performance; Bisazo acid dyes