Reinvestigation of Absolute Stereostructure of (-)-Rosiridol: Structures of Monoterpene Glycosides, Rosiridin, Rosiridosides A, B, and C, from Rhodiola sachalinensis
摘要:
从红景天的根中分离出了三种新的(-)-rosiridol苷,即rosiridosides A、B和C,以及rosiridin[(-)-rosiridol 1-O-β-D-吡喃葡萄糖苷]。在阐明这些新苷的结构过程中,重新研究了(-)-rosiridol 中 4-位的绝对构型。在对(-)-和(+)-rosiridol 衍生物应用改进的 Mosher 方法的基础上,(-)-rosiridol 中 4 位的绝对构型应从最近确定的 R 型修正为 S 型,从而确定了玫瑰苷 A、B 和 C 以及玫瑰苷的绝对立体结构。
Phenylalkanoids and Monoterpene Analogues from the Roots of <i>Rhodiola rosea</i>
作者:Zulfiqar Ali、Frank Fronczek、Ikhlas Khan
DOI:10.1055/s-2008-1034288
日期:2008.2
Roots extract of Rhodiola rosea L. is the source of important commercial preparations widely used throughout Europe, Asia, and the USA. Phytochemical investigation of the roots of Rhodiola rosea afforded 17 compounds, belonging to the phenylalkanoids and monoterpene analogues. Their structures were determined by spectroscopic and chemical methods. Rhodioloside F (1) was found to be new. The X-ray crystallographic study on salidroside (7) and the complete NMR data of 5 (mongrhoside) and 1a [(-)-rosiridol] are also described.
红景天根提取物是欧洲、亚洲和美国广泛使用的重要商业制剂的来源。对红景天根的植物化学研究发现了17种化合物,它们属于苯基烷烃和单萜烯类似物。通过光谱和化学方法确定了它们的结构。发现Rhodioloside F (1)是一种新化合物。还描述了对红景天苷(7)的X射线晶体学研究以及5(红景天苷)和1a((-)-红景天醇)的完整核磁共振数据。