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Hadhramout University Journal of Natural & Applied Sciences

Hadhramout University Journal of Natural & Applied Sciences

Abstract

In this research, two new azo dyes, 9-(2-Hydroxy-ethoxymethyl)-2-(2-hydroxy5nitrophenylazo)-1,9-dihydro-purin-6-one and 4-(2-Hydroxy-napHthalen-1-ylazo)-N-(5-methyl-isoxazol-3-yl)-benzenesulfonamide, derived from Acyclovir and Sulfamethoxazole was synthesized. The first dye synthesis was started by diazation of acyclovir, then combined with 4-nitrophenol activated with potassium hydroxide 10%, yielding 80%, and its purity was verified by thin layer chromatography (TLC). The second dye synthesis was started by diazation of Sulfamethoxazole then combined with β-naphthol activated with potassium hydroxide 10%, yielding 87%, and its purity was verified by thin layer chromatography (TLC). The identity of the resulting pigments was determined based on spectroscopic methods such as infrared spectroscopy, proton nuclear magnetic resonance spectrum and UV-VIS spectrum. The results of this study showed that they were in agreement with the blistered formula of the dyes. The biological activity of the resulting pigments was studied on two common and clinically pathogenic bacteria E.coli and Steaphylococcus. It was found that the dye has a good inhibitory ability towards the growth of both bacteria, more than it is in the case of acyclovir and Sulfamethoxazole.

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