Synthesis of (E)-azomethines from 4-aminobenzenesulfonamide (streptocide) derivatives was written by Dikusar, E. A.;Petkevich, S. K.;Potkin, V. I.;Stepin, S. G.. And the article was included in Vestsi Natsyyanal’nai Akademii Navuk Belarusi, Seryya Khimichnykh Navuk in 2015.Reference of 20665-85-4 This article mentions the following:
Synthesis of (E)-azomethines, derivatives of 4-aminobenzenesulfonamide (Streptocidum), by condensation of substituted vanillin-like benzaldehydes with streptocide in methanol, has been described. In the experiment, the researchers used many compounds, for example, 4-Formyl-2-methoxyphenyl isobutyrate (cas: 20665-85-4Reference of 20665-85-4).
4-Formyl-2-methoxyphenyl isobutyrate (cas: 20665-85-4) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Because of their lack of hydrogen-bond-donating ability, esters do not self-associate. Consequently, esters are more volatile than carboxylic acids of similar molecular weight.Reference of 20665-85-4
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics