Comparson of fermented soybean paste (Doenjang) prepared by different methods based on profiling of volatile compounds was written by Jo, Ye-Jin;Cho, In Hee;Song, Chi Kwang;Shin, Hye Won;Kim, Young-Suk. And the article was included in Journal of Food Science in 2011.Recommanded Product: 2,4,5-Trimethyloxazole This article mentions the following:
In this study, 2 different extraction methods, namely solvent-assisted flavor evaporation (SAFE) and solid-phase microextraction (SPME), were employed to investigate the comprehensive volatile profile of Doenjang (one of Korean fermented soybean pastes) efficiently. Quant., major volatiles of Doenjang isolated by SAFE were 3-methylbutanoic acid, butanoic acid, 3-hydroxy-2-methyl-4H-pyran-4-one (maltol), Et 2-methylbutanoate, 2-methylpropanoic acid, tetramethylpyrazine, and 4-ethyl-2-methoxyphenol, while ethanol, ethenylbenzene, Et benzoate, Et linoleate, Et acetate, Et butanoate, tetramethylpyrazine, and Et 2-methylpropanoate extracted by SPME. In addition, volatile profiling that applied principal component anal. to gas chromatog.-mass spectrometry datasets allowed Doenjang samples that had been prepared using different traditional and com. methods to be discriminated, and the volatile compounds that contributed to their discrimination were assigned. The major volatiles that were related to differentiation of traditional and com. Doenjang samples were 2-pentylfuran, 4-ethylphenol, dihydro-5-methyl-2(3H)-furanone, butanoic acid, pyrazines (for example, 2-ethyl-5-methylpyrazine and 2,3-dimethylpyrazine), esters (for example, Et 4-methylpentanoate and di-Et succinate), maltol, di-Me disulfide, 2- and 3-methylbutanal, hexanal, 4-vinylphenol, and ethanol. In the experiment, the researchers used many compounds, for example, 2,4,5-Trimethyloxazole (cas: 20662-84-4Recommanded Product: 2,4,5-Trimethyloxazole).
2,4,5-Trimethyloxazole (cas: 20662-84-4) belongs to oxazolidine derivatives. A common way to produce multisubstituted oxazolidines is by means of cycloaddition reactions. Oxazolidines are commonly used as metal ligands in asymmetric catalysis, synthetic intermediates in organic synthesis, and also used as the protecting groups.Recommanded Product: 2,4,5-Trimethyloxazole
Referemce:
Oxazolidine – Wikipedia,
Oxazolidine | C3H7NO – PubChem