Oligoamides from dodecanedioic acid and 4,4′-methylenedicyclohexylamine. (Oligoamides of the “Qiana” type) was written by Hahn, Guenther Erhard;Kusch, Peter;Rossbach, Volker;Zahn, Helmut. And the article was included in Makromolekulare Chemie in 1985.Formula: C13H24O4 This article mentions the following:
Pure isomers of cyclic monomeric amides were synthesized by cyclocondensation of 1,10-dodecanedioyl dichloride [4834-98-4] and trans,trans– [6693-29-4], cis,trans– [6693-30-7], and cis,cis-4,4‘-methylenedicyclohexylamine [6693-31-8] and were characterized by 1H NMR, IR and mass spectroscopy, as well as by HPLC and x-ray diffraction. The content of these cyclic amides in Qiana nylon fibers was determined by fractionated extraction and sublimation. Synthesis and properties of monomeric linear condensation products containing dodecanedioyl and methylenedicyclohexylamine units (dicarboxylic acid-type with blocked and free end groups) were also described. In the experiment, the researchers used many compounds, for example, 12-Methoxy-12-oxododecanoic acid (cas: 3903-40-0Formula: C13H24O4).
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. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Formula: C13H24O4
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics