Synthesis and Dyeing Performance of Disperse Dyes Based on 4-Hydroxy-1-Methyl-Quinolin-2(1H)-One System

H.T. Mehta and A.G. Mehta

Department of Chemistry, P.T. Sarvajanik College of Science, Surat-395 001, India


4-Hydroxy-1-methyl-quinolin-2( 1H)-one (III) used as a coupling component,
was prepared by the methylation of anthranilic acid giving
N-methylanthranilic acid (I) followed by acetylation giving N-methyl-N-
acetyl anthranilic acid (II) and ring closure. Twenty 3-arylazo-4-
hydroxy-1-methyl-quinolin-2( 1H)-ones disperse dyes (Va-t) were prepared
by coupling(lII) with various diazo components (lVa-t).  The compounds
Va-t are characterized by elemental and spectral analyses and their dyeing
performance on polyester fibre was assessed. These compounds gave
yellow. orange, brown and red shades with poor to good light-fastness,
very good to excellent wash fastness and poor to excellent exhaustion.


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  • Asian J. Chem. /
  •  2000 /
  •  12(2) /
  •  pp 389-393