IR and Vibrational Circular Dichroism Spectroscopy of Matrine- and Artemisinin-Type Herbal Products: Stereochemical Characterization and Solvent Effects

详细信息    查看全文

• 作者：Yuefei Zhang ; M. Reza Poopari ; Xiaoli Cai ; Aliaksandr Savin ; Zahra Dezhahang ; Joseph Cheramy ; Yunjie Xu
• 刊名：Journal of Natural Products
• 出版年：2016
• 出版时间：April 22, 2016
• 年：2016
• 卷：79
• 期：4
• 页码：1012-1023
• 全文大小：725K
• 年卷期：0
• ISSN：1520-6025

文摘

Five Chinese herbal medicines—matrine, oxymatrine, sophoridine, artemisinin, and dihydroartemisinin—were investigated using vibrational circular dichroism (VCD) experiments and density functional theory calculations to extract their stereochemical information. The three matrine-type alkaloids are available from the dry roots of Sophora flavescens and have long been used in various traditional Chinese herbal medicines to combat diseases such as cancer and cardiac arrhythmia. Artemisinin and the related dihydroartemisinin, discovered in 1979 by Professor Youyou Tu, a 2015 Nobel laureate in medicine, are effective drugs for the treatment of malaria. The VCD measurements were carried out in CDCl₃ and DMSO-d₆, two solvents with different dielectric constants and hydrogen-bonding characteristics. A “clusters-in-a-liquid” approach was used to model both explicit and implicit solvent effects. The studies show that effectively accounting for solvent effects is critical to using IR and VCD spectroscopy to provide unique spectroscopic features to differentiate the potential stereoisomers of these Chinese herbal medicines.