Synthesis and dyeing characteristics of ethyl 1-(2-acetamido-3-cyano-5-carbethoxythiophen-4-yl)glyoxalate-(aryl) hydrazones

62-64<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;="" color:black;mso-ansi-language:en-us;mso-fareast-language:en-us;mso-bidi-language:="" ar-sa"="">Five monoazo disperse dyes, ethyl 1-<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;color:#121212;mso-ansi-language:en-us;mso-fareast-language:en-us;="" mso-bidi-language:ar-sa"="">(<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;color:black;mso-ansi-language:en-us;mso-fareast-language:en-us;="" mso-bidi-language:ar-sa"="">2-acetamido-3-cyano-5-carbethoxythiophen-4-yl)glyoxalate-(aryl)hydrazones, were prepared and their dyeing performance on polyester fibres was assessed. The dyeings on polyester had orange red and bright red shades with low pickup, moderate light fastness and good sublimation fastness.