Synthesis of water-soluble azomethines based on the substituted benzaldehydes of vanillin series and D-(+)-glucosamine hydrochloride was written by Dikusar, E. A.;Potkin, V. I.;Kozlov, N. G.. And the article was included in Russian Journal of General Chemistry in 2009.Computed Properties of C12H14O4 This article mentions the following:
A preparative method for the synthesis of water-soluble azomethines by the reaction of substituted benzaldehydes of vanillin series with D-(+)-glucosamine hydrochloride in the presence of potassium hydrogen carbonate in methanol was developed. In the experiment, the researchers used many compounds, for example, 4-Formyl-2-methoxyphenyl isobutyrate (cas: 20665-85-4Computed Properties of C12H14O4).
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. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.Computed Properties of C12H14O4
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics