Synthesis of Deuterium-Labeled 1,1,6-Trimethyl-1,2-dihydronaphthalene (TDN) and Quantitative Determination of TDN and Isomeric Vitispiranes in Riesling Wines by a Stable-Isotope-Dilution Assay
作者:Recep Gök、Pia Bechtloff、Michael Ziegler、Hans-Georg Schmarr、Ulrich Fischer、Peter Winterhalter
DOI:10.1021/acs.jafc.9b01428
日期:2019.6.5
total TDN and isomeric vitispiranes, especially in German Riesling wines, was performed using a stable-isotope-dilution assay (SIDA). For this purpose, a novel six-step synthetic route to TDN and deuterium-labeled TDN was developed. A standardized sample preparation for TDN and vitispiranes and a rapid acid-hydrolysis method at genuine wine-pH conditions for the conversion of the precursors into TDN and
C 13-norisoprenoid芳香族化合物1,1,6-三甲基-1,2-二氢萘(TDN)和异构体2,10,10-三甲基-6-亚甲基-1-氧杂螺[4.5] dec-7-enes,所谓的vitispiranes被认为与生物合成有关。它们在瓶装雷司令葡萄酒中的浓度较高,尤其是雷司令葡萄酒的品种香气的重要贡献者。由于文献中报道的定量方法和数据存在差异,因此使用稳定的同位素稀释测定法(SIDA)对游离TDN和总TDN以及异构体维斯匹兰的浓度水平进行了重新测定,尤其是在德国雷司令葡萄酒中。为了这个目的,开发了一种新颖的六步合成途径来合成TDN和氘标记的TDN。还开发了用于TDN和维替斯潘烷的标准化样品制备方法,以及在纯正的葡萄酒pH条件下将前体转化为TDN和维斯替潘烷的快速酸水解方法。自动化的HS-SPME应用于来自两个葡萄酒比赛的250个葡萄酒样品,并通过气相色谱-质谱联用选择离子监测(GC-S