Microwave‐Assisted Synthesis of Arylazoaminopyrazoles as Disperse Dyes for Textile Printing |
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| Authors: | Tawfik A Khattab Karima M Haggag Mohamed H Elnagdi Amal A Abdelrahman Sherif Abdelmoez Aly |
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| Affiliation: | 1. Dyeing, Printing and Auxialliries Department, Textile Research Division, National Research Centre, Dokki, Cairo 12311, Egypt;2. Department of Chemistry, Faculty of Science, University, Giza, Cairo, Egypt |
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| Abstract: | The synthesis of heterocyclic azo‐dyes via conventional heating and microwave (MW) heating was investigated. From a sequence of reactions starting from cyanoacetic acid, 4‐arylazo‐2H‐pyrazol‐3‐ylamines and 4‐arylazo‐2‐phenyl‐2H‐pyrazol‐3‐ylamines were obtained. The structures these compounds were obtained by inspection of spectroscopic and analytical techniques including 1H and 13C NMR spectroscopy, IR spectroscopy, mass spectrometry, and elemental analysis. The fastness properties and UV/Vis absorption spectroscopic data of these disperse dyes in printing polyester fabrics were investigated. |
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| Keywords: | Arylhydrazonal Aminopyrazol Microwave chemistry Disperse dyes Polyester printing Dyes/Pigments |
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