?NEW DISPERSE DYES FROM SUBSTITUTED PYRIDINES. PART-I. SYNTHESIS OF METHYL-4, 6,DmYDROXY-20xo-l-PHENYL-5-ARYLAZOPYRIDINE-3-CARBOXYLATE AND THEIR DERIVATIVES

Authors

  • Rasheeda Parveenr PCSIR Laboratories Complex, Karachi-75280, Pakistan
  • Muhammad Aleem Ahmed pCSIR Laboratories Complex, Karachi-75280, Pakistan
  • Shaheen A Husain PCSIR Laboratories Complex, Karachi-75280, Pakistan
  • Shahida Parveen National Physical and Standards Laboratory, Islamabad, Pakistan

Keywords:

Azo dyes, Subsituted pyridines, Disperse dyes, Spectroscopic studies.

Abstract

The reaction of methyl-a, 6, dihydroxy-2oxo, l-phenyl pyridine-3 carboxylate (iii) with diazotized aromatic amines
(ii), yielded compounds (iv) showing absorption bands between \l11IX 570-590 nm, characteristic of azo dyes. An
aqueous solution of (iv) having a non-ionic dispersing agent and a dye carrier at pH 5-6 and temperature 135°C and 75°C
when applied to polyester and acetate fiber respectively furnished beautiful colours ranging from orange to yellow.

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Published

2001-08-20

How to Cite

Parveenr, R., Ahmed, M. A., Husain, S. A., & Parveen, S. (2001). ?NEW DISPERSE DYES FROM SUBSTITUTED PYRIDINES. PART-I. SYNTHESIS OF METHYL-4, 6,DmYDROXY-20xo-l-PHENYL-5-ARYLAZOPYRIDINE-3-CARBOXYLATE AND THEIR DERIVATIVES. Biological Sciences - PJSIR, 44(4), 244–247. Retrieved from https://v2.pjsir.org/index.php/biological-sciences/article/view/1935