Analysis and Sensory Evaluation of the Stereoisomers of a Homologous Series (C5–C10) of 4-Mercapto-2-alkanols
作者:Svenja Nörenberg、Christiane Kiske、Bastian Reichardt、Verena Andelfinger、Anne Pfeiffer、Franziska Schmidts、Wolfgang Eisenreich、Karl-Heinz Engel
DOI:10.1021/acs.jafc.7b03543
日期:2017.10.11
the medium-chain homologues (C7–C9) of the 4-mercapto-2-alkanol stereoisomers. Except for the C5 homologue, the lowest odor thresholds were determined for the (2R,4R)-configured stereoisomers. The variability in odor qualities was mainly determined by the chain length. None of the 4-mercapto-2-alkanol stereoisomers showed consistent odor qualities for all homologues.
同源的4-巯基-2-链烷醇系列(C5-C10)用于研究立体化学对一类具有1,3-氧-硫官能度的天然存在的多官能硫醇的感官特性的影响。立体异构体是通过外消旋混合物的合成和随后的脂肪酶催化的动力学拆分而获得的。立体异构体的分析分离是通过使用手性固定相的毛细管气相色谱法(GC)实现的。通过NMR分析确定绝对构型。通过GC /嗅觉测定法进行的感官评估显示,4-巯基-2-链烷醇立体异构体的中链同系物(C7-C9)的气味阈值极小。除C5同源物外,(2 R,4 R)-配置的立体异构体。气味质量的变化主要由链长决定。对于所有同系物,4-巯基-2-链烷醇立体异构体均未显示出一致的气味品质。