Analysis of volatile compounds in Awamori using solid phase extraction was written by Tamamura, Takako;Wada, Koji;Takara, Kensaku;Ishikawa, Nobuo;Iwabuchi, Katsuhisa;Nakasone, Yoko;Chinen, Isao. And the article was included in Nippon Shokuhin Kagaku Kogaku Kaishi in 2001.Application In Synthesis of Ethyl 2-hydroxy-3-phenylpropanoate This article mentions the following:
Awamori is distilled liquor containing up to 43% ethanol concentration A rapid and simplified technique for the anal. of major volatile compounds in Awamori using solid phase extraction was developed. A column packed with Porapak Q resin was used for extraction of volatile compounds For recovery tests, a model solution (10%-43% ethanol concentration) containing 4 kinds of alcs., 3 kinds of esters and 3 kinds of fatty acids as representative volatile compounds in Awamori was used. The recoveries of alcs. and fatty acids increased as ethanol concentration decreased. In the case of different amount of the model solution used, the recoveries of compounds showed also significant differences. The highest recovery efficiency was obtained by adjustment of ethanol concentration and amount of the sample solution Relative standard deviations were less than 7.23%. Awamori samples were firstly adjusted to 10% (volume/volume) ethanol concentration with pure water and secondly filled up to 860 mL with 10% ethanol solution Volatile compounds from Awamori were trapped on Porapak Q resin and recovered. Anal. of extracts from three varieties of Awamori by GC and GC-MS revealed significant differences in the concentration of alcs., esters, and fatty acids. In the experiment, the researchers used many compounds, for example, Ethyl 2-hydroxy-3-phenylpropanoate (cas: 15399-05-0Application In Synthesis of Ethyl 2-hydroxy-3-phenylpropanoate).
Ethyl 2-hydroxy-3-phenylpropanoate (cas: 15399-05-0) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Polyesters are important plastics, with monomers linked by ester moieties. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Application In Synthesis of Ethyl 2-hydroxy-3-phenylpropanoate
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics