3-Sulfanylhexan-1-ol(3SH)是一种白葡萄酒的香气,具有热带水果的香气。从1-丁醇开始,开发了可靠的合成途径,即3-S-谷胱甘肽己醛(glut-3SH-al)(尚未深入研究的3SH前体)。将该合成物应用于1-丁醇-d 10,保存了八个氘,产生了glut-3SH-al- d 8,可用作将来研究葡萄酒中glut-3SH-al的发生和发展的内在标准。系统。此外,这两种GLUT-3SH-SO 3和GLUT-3SH-SO 3 - d 8,从相应的醛合成,使在生物发生3SH这些亚硫酸氢盐加合物的作用的进一步研究。
In a previous work, we identified 6-propylbenzofuran-7-ol as an off-flavor compound formed from ascorbic acid and (E)-hex-2-enal in a test apple beverage. In this study, we elucidate the pathway by which 6-propylbenzofuran-7-ol formed. Isotope labeling studies revealed that the propyl group of 6-propylbenzofuran-7-ol derives from (E)-hex-2-enal and that 6-propylbenzofuran-7-ol contains carbons 2-6 of ascorbic acid. Two compounds, namely, 2,3-dihydro-6-propylbenzofuran-3,7-diol and 3-(2-furoyl)hexanal, were identified as byproducts of a model reaction of ascorbic acid and (E)-hex-2-enal. Each of these compounds was dissolved in an aqueous solution of citric acid and stored at 60 C for 1 week. After storage, 6-propylbenzofuran-7-ol was detected from a solution of 2,3-dihydro-6-propylbenzofuran-3,7-diol, but not from 3-(2-furoyl)hexanal. 6-Propylbenzofuran-7-ol was formed by isolating tricyclic hemiacetal lactone derived from the Michael addition of ascorbic acid to (E)-hex-2-enal, mixing the tricyclic hemiacetal lactone with the aqueous solution of citric acid, and applying heat. This confirmed that 6-propylbenzofuran-7-ol was formed via the Michael adduct.