Occurrence of (<i>Z</i>)-3,4-Dideoxyglucoson-3-ene in Different Types of Beer and Malt Beer as a Result of 3-Deoxyhexosone Interconversion
作者:Michael Hellwig、Arndt Nobis、Sophia Witte、Thomas Henle
DOI:10.1021/acs.jafc.6b00468
日期:2016.4.6
beer for the first time. The E and Z isomers of the corresponding quinoxaline were synthesized by a new synthetic approach and isolated by semipreparative HPLC. An assay was developed for quantitation of (E)- and (Z)-3,4-DGE by HPLC–MS/MS, and the Z isomer was determined at concentrations of 0.3–1.7 mg/L in beer and 0.5–4.8 mg/L in malt beer samples. The E isomer was shown to be of little importance
在啤酒中,3-deoxyglucosone(3-DG)和3-deoxygalactosone(3-DGal)是重要的糖降解产物,但对于这些化合物在不同类型的啤酒中相互转化的相关性知之甚少。在本研究中,在不同类型的啤酒(比尔森啤酒,小麦啤酒,博克啤酒,深色啤酒和不含酒精的啤酒)中,对3-DG的定量浓度为12.9-52.7 mg / L,对3-DGal的定量浓度为6.0-26.4 mg / L。啤酒)。麦芽啤酒中的浓度倾向于更高。很大程度上重叠的浓度范围排除了啤酒通过其3-脱氧糖苷的含量进行分类的可能性。3,4-Dideoxyglucoson-3-ene(3,4-DGE)被确定为重要的中间体,并首次在啤酒和麦芽啤酒中进行了定量。该Ë和ž通过新的合成方法合成了相应的喹喔啉的异构体,并通过半制备HPLC进行了分离。开发了一种通过HPLC-MS / MS对(E)-和(Z)-3,4-DGE进行定量的测