Syntheses of 4-arylazo-5-[acetamido/N-(β-cyanoethylamino )]-acenaphthenes and their dyeing performance on polyester and polyamide fibres

Abstract

<span style="font-size:11.0pt;line-height:115%; font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-fareast-font-family:="" "times="" new="" roman";mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:="" minor-latin;mso-bidi-font-family:calibri;mso-bidi-theme-font:minor-latin;="" mso-ansi-language:en-us;mso-fareast-language:en-us;mso-bidi-language:ar-sa"="">4-Arylazo-5-acetamido acenaphthenes (<b>Va-f</b>)and 4-arylazo-5-N-(β-cyanoethylamino)acenaphthenes (<b>VIa-f</b>) were prepared from 4-arylazo-5-aminoacenaphthenes (<b>IVa-f</b>)-by acetylation and cyanoethylation respectively. The compounds <b>IVa-f</b> were obtained by coupling 5-aminoacenaphthene (<b>II</b>) with aryl diazonium salts (<b>IIIa-f</b>). The compounds <b>Va-f</b> and <b>VIa-f</b> when applied on polyester and polyamide fibres as disperse dyes gave golden yellow to scarlet shades with good pick-up and moderate light fastness. These compounds also exhibited very good sublimation fastness on polyester fibres.</span>