Identification and Categorization of Volatile Sulfur Flavor Compounds in Roasted Malts and Barley was written by Parr, Hebe;Bolat, Irina;Cook, David. And the article was included in Journal of the American Society of Brewing Chemists.Recommanded Product: 2-Ethoxythiazole This article mentions the following:
We report for the first time the application of HS-SPME-GC coupled with sulfur-specific pulsed flame photometric detection to sensitively analyze the volatile sulfur compounds (VSC鈥瞫) present in drum roasted malt and barley samples typically used in brewing. Twenty-five VSC鈥瞫 were identified across a range of 9 roasted products produced from barley/malt. Thiophenes (n = 10) were a major class of heterocyclic sulfur compounds identified, along with thiazoles (n = 4), and thiofurans (n = 2). Quant. (n = 18) and semi-quant. (n = 6) data are reported for VSC鈥瞫 across this product range. Principal Component Anal. (PCA) of data clearly identified (PC1) that heterocyclic sulfur compounds were formed in products processed at high temperatures (>170 掳C) under dry conditions (roasted barley, chocolate and black malts). Whereas compounds such as Me dithiolane and Me Pr sulfide were associated primarily with lower temperature finished products (crystal, amber and cara malts). Pathways for the generation of observed VSC鈥瞫 are considered alongside typical roasting conditions employed in the manufacture of these products. Concentrations of VSC鈥瞫 identified will certainly contribute characteristic aromas to the roasted products themselves. The transfer of VSC鈥瞫 from the grist into finished beer, and their sensory impact in a range of beer styles, remains to be determined In the experiment, the researchers used many compounds, for example, 2-Ethoxythiazole (cas: 15679-19-3Recommanded Product: 2-Ethoxythiazole).
2-Ethoxythiazole (cas: 15679-19-3) belongs to thiazole derivatives. Thiazole rings are planar and aromatic. Thiazoles are characterized by larger pi-electron delocalization than the corresponding oxazoles and have therefore greater aromaticity. Various laboratory methods exist for the organic synthesis of thiazoles. Prominent is the Hantzsch thiazole synthesis is a reaction between haloketones and thioamides.Recommanded Product: 2-Ethoxythiazole
Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica