Syntheses of Chiral 1,8-Cineole Metabolites and Determination of Their Enantiomeric Composition in Human Urine After Ingestion of 1,8-Cineole-Containing Capsules
作者:Monika Schaffarczyk、Teodor Silviu Balaban、Michael Rychlik、Andrea Buettner
DOI:10.1002/cplu.201200253
日期:2013.1
The chiral metabolites in human urine were investigated after ingestion of a 1,8‐cineole (eucalyptol)‐containing entero‐coated capsule (Soledum). For identification of the various enantiomers the enantiomerically pure (−/+)‐α2‐hydroxy‐1,8‐cineole, (−/+)‐β2‐hydroxy‐1,8‐cineole, (−/+)‐9‐hydroxy‐1,8‐cineole, and (−/+)‐2‐oxo‐1,8‐cineole were prepared. To achieve this aim, after acetylation of the synthesized
摄入含1,8-桉树脑(桉树脑)的肠溶胶囊(Soledum)后,研究了人类尿液中的手性代谢物。为了鉴定各种对映异构体,对映体纯的(-/ +)-α2-羟基-1,8-桉树脑,(-/ +)-β2-羟基-1,8-桉树脑,(-/ +)-9-羟基制备了-1,8-桉树脑和(-/ +)-2-氧代-1,8-桉树脑。为实现这一目标,在合成的外消旋2-羟基和9-羟基-1,8-桉树脑被乙酰化后,猪肝酯酶或酵母介导的水解作用为(-)-醇及其对映异构体的对映体(+)-乙酸酯提供了对映体超过33–100%。通过拆分乙酸盐的水解获得的Dess-Martin高碘烷对醇(+)-α2-羟基-1,8-桉树脑的氧化,提供了相应的(+)-2-氧代-1,8-桉树脑,同时进行了氧化(-)-α2-羟基-1,8-桉树脑的化合物得到(-)-2-2-氧-1,8-桉树脑。使用这些标准品的七个代谢物(+/-)-α2-羟基-1,8-桉树脑,(+/-)-β2-羟基-1