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Synthesis of several new pyridine‐2(1H) thiones containing an arylazo function and their applications in textile printing

Synthesis of several new pyridine‐2(1H) thiones containing an arylazo function and their... Purpose – To synthesise several new pyridine‐2(1H)thione containing an arylazo function and their applications in textile printing. Design/methodology/approach – To prepare substituted 5‐arylazopyridine‐2(1H)thione by the coupling of diazonium salts of aniline derivatives with dibenzoyl methane (1,3‐diphenyl‐1,3‐propanedione) to form arylhydrazone of dibenzoylmethane which react with cyanothioacetamide in boiling ethanolic sodium ethoxide to yield the 5‐arylazo‐2(1H)‐pyridinethione derivatives. The printing properties by screen printing or transfer printing technique of these dyes are reported by using sodium alginate as thickening agent. Findings – The structure of 5‐arylazopyridine‐2(1H)thione dyes were established and confirm for the reaction products on the basis of their element analysis and spectral data (MS, IR and 1 H‐NMR). The suitability of the prepared dyestuffs for either heat transfer printing or traditional printing on polyester and nylon 6 fabrics has been investigated. The prints obtained from dyes possess high‐colour strength as well as good overall fastness properties. Research limitations/implications – Synthesis of azo dyes containing pyridinethiole moiety has never been reported in textile printing. Practical implications – Production of simple and less costly dyes. Originality/value – 5‐arylazo pyridine‐2(1H)thione, the result of our work aimed to define the scope of and limitation of our procedures for the synthesis of novel 5‐arylazopyridine‐2(1H)thione. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Pigment & Resin Technology Emerald Publishing

Synthesis of several new pyridine‐2(1H) thiones containing an arylazo function and their applications in textile printing

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References (7)

Publisher
Emerald Publishing
Copyright
Copyright © 2008 Emerald Group Publishing Limited. All rights reserved.
ISSN
0369-9420
DOI
10.1108/03699420810860428
Publisher site
See Article on Publisher Site

Abstract

Purpose – To synthesise several new pyridine‐2(1H)thione containing an arylazo function and their applications in textile printing. Design/methodology/approach – To prepare substituted 5‐arylazopyridine‐2(1H)thione by the coupling of diazonium salts of aniline derivatives with dibenzoyl methane (1,3‐diphenyl‐1,3‐propanedione) to form arylhydrazone of dibenzoylmethane which react with cyanothioacetamide in boiling ethanolic sodium ethoxide to yield the 5‐arylazo‐2(1H)‐pyridinethione derivatives. The printing properties by screen printing or transfer printing technique of these dyes are reported by using sodium alginate as thickening agent. Findings – The structure of 5‐arylazopyridine‐2(1H)thione dyes were established and confirm for the reaction products on the basis of their element analysis and spectral data (MS, IR and 1 H‐NMR). The suitability of the prepared dyestuffs for either heat transfer printing or traditional printing on polyester and nylon 6 fabrics has been investigated. The prints obtained from dyes possess high‐colour strength as well as good overall fastness properties. Research limitations/implications – Synthesis of azo dyes containing pyridinethiole moiety has never been reported in textile printing. Practical implications – Production of simple and less costly dyes. Originality/value – 5‐arylazo pyridine‐2(1H)thione, the result of our work aimed to define the scope of and limitation of our procedures for the synthesis of novel 5‐arylazopyridine‐2(1H)thione.

Journal

Pigment & Resin Technology – Emerald Publishing

Published: Mar 21, 2008

Keywords: Dyes; Textiles; Printers

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