Synthesis of 4-hydroxy(alkyloyloxy,aryloyloxy)-3-methoxy(ethoxy)phenylmethylene-(2-carboxyphenyl)amines was written by Dikusar, E. A.;Kozlov, N. G.;Potkin, V. I.;Zelenkovskii, V. M.;Malama, A. A.;Dubovik, S. V.. And the article was included in Vestsi Natsyyanal’nai Akademii Navuk Belarusi, Seryya Khimichnykh Navuk in 2005.Reference of 20665-85-4 This article mentions the following:
Schiff bases of general formula 3-R1O-4-R2OC6H3CH:NC6H4CO2H-2 (R1 = Me, Et; R2 = H, MeCO, H2C:CHCO, 2-ClC6H4CO, etc.) were synthesized by condensation of the corresponding 3,4-disubstituted benzaldehydes with 2-aminobenzoic acid. The products were obtained as mixtures of E- and Z-isomers in the 3:2 ratio. The formation enthalpies for both E- and Z-isomers of some of the products were calculated using semiempirical MNDO-PM3 approach confirming the better thermodn. stability of the E-isomers. 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 also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.Reference of 20665-85-4
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics