α- and β-Thujones (Herbal Medicines and Food Additives): Synthesis and Analysis of Hydroxy and Dehydro Metabolites
作者:Nilantha S. Sirisoma、Karin M. Höld、John E. Casida
DOI:10.1021/jf001445+
日期:2001.4.1
acting as noncompetitive blockers of the gamma-aminobutyric acid-gated chloride channel. Synthesis and analysis of the metabolites are essential steps in understanding their health effects. Oxidation of alpha- and beta-thujones as their 2,3-enolates with oxodiperoxymolybdenum(pyridine)(hexamethylphosphoric triamide) gave the corresponding (2R)-2-hydroxythujones assigned by (1)H and (13)C NMR and X-ray
含有α-和β-丁二烯的精油是重要的草药和食品添加剂。丁二酮非对映异构体是迅速代谢的惊厥剂,充当γ-氨基丁酸门控氯离子通道的非竞争性阻滞剂。代谢物的合成和分析是了解其健康影响的重要步骤。用过二氧过氧钼(吡啶)(六甲基磷酸三酰胺)氧化α-和β-thujones2,3烯酸酯,得到相应的(2R)-2-羟基thujones,由(1)H和(13)C NMR和X射线确定晶体学。在分别用过酸和四氧化氧化后,通过3,4-烯醇乙酸酯将α-丁酮转化为4-羟基-α-和-β-丁二酮。臭氧化提供了7-羟基-α-和-β-thujones,并且通过脱水提供了7,8-脱氢化合物。4,由sa木烯经sa木酚制备10-脱氢thuthone。羟基和脱氢衍生物很容易鉴定,并通过GC / MS分析为母体化合物以及三甲基甲硅烷基和甲基肟衍生物。另一项研究确定,所有这些化合物都是α-和β-丁二烯的代谢产物。