Aggregations of the compounds having two functional groups such as carboxyl group, hydroxyl group, and/or amino group on the surface of alumina and silica gel, and their influence for selective reactions was written by Ogawa, H.. And the article was included in Transactions of the Materials Research Society of Japan in 1994.Application of 3903-40-0 This article mentions the following:
The adsorption states and selective reactions of compounds such as terephthalic acid (TPA), aliphatic dicarboxylic acids (Ci), 6-aminocaproic acid (6-ACA), and 12-hydroxystearic acid (12-HSA) were ascertained. TPA and Ci chemisorbed on alumina as monocarboxylate anion react with diazomethane to form the corresponding monomethyl esters quant. The selective monomethyl esterification of longer chain acid in a mixture with shorter one occurs on alumina. 6-ACA adsorbed on silica gel and 12-HSA adsorbed on H2SO4/silica gel, due to their easier dispersion over the surface, are converted significantly to δ -caprolactam and ω -stearo-1,12-lactone, resp. In the experiment, the researchers used many compounds, for example, 12-Methoxy-12-oxododecanoic acid (cas: 3903-40-0Application of 3903-40-0).
12-Methoxy-12-oxododecanoic acid (cas: 3903-40-0) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. 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.Application of 3903-40-0
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics