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。
Revised Absolute Stereochemistry of Rhodiolosides A-D, Rhodiolol A and Sachalinol A from Rhodiola rosea
作者:Wei Li、Deqiang Dou、Kazuo Koike
DOI:10.1248/cpb.56.1047
日期:——
The absolutestereochemistry of rhodiolosides A-D (1-4), four monoterpene glycosides from the roots of Rhodiola rosea, and their aglycones, rhodiolol A (5), (-)-rosiridol (6) and sachalinol A (7), were reinvestigated. It was found that the absolute configurations of C-4 in these compounds, previously assigned to be 4-R, should be revised to 4-S.