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Article
Publication date: 1 November 2013

M.A Metwally, M.E Khalifa, H.E Gaffer and S.F El-Bially

Treatment of diethyl 2-(4-methoxyphenyl)-4-methyl-6-oxocyclohex-4-ene-1,1-dicarboxylate (1) with hydrazine hydrate in ethanol affords the corresponding indazole derivative (2)…

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Abstract

Treatment of diethyl 2-(4-methoxyphenyl)-4-methyl-6-oxocyclohex-4-ene-1,1-dicarboxylate (1) with hydrazine hydrate in ethanol affords the corresponding indazole derivative (2). Coupling of 2 with diazotized aromatic amines furnishes the corresponding new azo compounds (3). Compound 1 is subjected to a Japp-Klingemann reaction in an alkaline medium, where hydrazones (4) are formed. Treatment of 4 with hydrazine hydrate and phenylhydrazine in ethanol gives the corresponding new azo compounds (5 and 6, respectively). The structures of all compounds are confirmed by elemental and spectral analyses. Compounds 3-6 are applied as disperse dyes for dyeing polyester and nylon fabrics, and their characteristics and fastness properties have been measured.

Details

Research Journal of Textile and Apparel, vol. 17 no. 4
Type: Research Article
ISSN: 1560-6074

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