Synthesis and dyeing characteristics of ethyl 1-(2-acetamido-3-cyano-5-carbethoxythiophen-4-yl)glyoxalate(aryl)hydrazones was written by Sabnis, R. W.;Rangnekar, D. W.. And the article was included in Indian Journal of Fibre & Textile Research in 1992.Formula: C12H14N2O4S This article mentions the following:
Five monoazo disperse dyes, Et 1-(2-acetamido-3-cyano-5-carbethoxythiophen-4-yl)glyoxalate-(aryl)hydrazones, were prepared and their dyeing performance on polyester fibers was assessed. The dyeings on polyester had orange red and bright red shades with low pickup, moderate light fastness and good sublimation fastness. In the experiment, the researchers used many compounds, for example, Ethyl 5-amino-4-cyano-3-(2-ethoxy-2-oxoethyl)thiophene-2-carboxylate (cas: 58168-20-0Formula: C12H14N2O4S).
Ethyl 5-amino-4-cyano-3-(2-ethoxy-2-oxoethyl)thiophene-2-carboxylate (cas: 58168-20-0) belongs to nitriles. Nitrile function is a very important functional group because it can be manipulated to other functional groups such as carboxylic acid by hydrolysis or amine by reduction, respectively. Nitrile groups in organic compounds can undergo a variety of reactions depending on the reactants or conditions. A nitrile group can be hydrolyzed, reduced, or ejected from a molecule as a cyanide ion.Formula: C12H14N2O4S
Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts