Structure–Odor Relationship Study on Geraniol, Nerol, and Their Synthesized Oxygenated Derivatives
作者:Shaimaa Awadain Elsharif、Andrea Buettner
DOI:10.1021/acs.jafc.6b04534
日期:2018.3.14
indices (RI), mass spectrometric (MS), and nuclear magnetic resonance (NMR) data. All compounds were individually tested for their odor qualities and odor thresholds in air (OT). Geraniol, the Z-isomer, with an OT of 14 ng/L, was found to be more potent than its E-isomer, nerol, which has an OT of 60 ng/L. However, 8-oxoneryl acetate was the most potent derivative within this study, exhibiting an OT of
尽管是具有相同柑橘样花香气味的异构体,但香叶醇1和香叶醇3却显示出不同的气味阈值。迄今为止,尚无系统的研究来阐明其特定气味特性所需的结构特征。因此,从这两个基本结构及其相应的酯(即乙酸香叶酯2和乙酸神经酯4)开始,合成了总共12种含氧化合物,并对其保留指数(RI),质谱(MS)和核磁共振(NMR)数据。分别测试了所有化合物的气味质量和空气中的气味阈值(OT)。香叶醇Z发现OT值为14 ng / L的α-异构体比其OT为60 ng / L的E-异构体nerol更有效。但是,乙酸8-氧杂戊酯是这项研究中最有效的衍生物,OT值为8.8 ng / L,而8-氧合己内酯的效力最差,OT为493 ng / L。有趣的是,8-氧代衍生物闻起来有霉味和脂肪,而8-羟基衍生物则显示出与1和3相似的气味。发现8-羧基香叶醇无味,而其E-异构体8-羧基神经醇显示出脂肪,蜡状和油腻感。总体而言,我们观察到C-8上的氧化主要影响气味质量,而E