Studies on the Constituents of Cimicifuga Species. XX. Absolute Stereostructures of Cimicifugoside and Actein from Cimicifu simplex WORMSK.
作者:Akiko KUSANO、Masayuki TAKAHIRA、Makio SHIBANO、Yasuko IN、Toshimasa ISHIDA、Toshio MIYASE、Genjiro KUSANO
DOI:10.1248/cpb.46.467
日期:——
The absolute stereostructues of cimicifugoside (1) and actein (2) from Cimicifuga simplex were established by X-ray crystal analysis of 26(S)-O-methylcimicifugenin A (1cS) prepared from 1, negative CD curves of 26-O-methyl-3-keto-cimicifugenins (1dS, 1dR), comparative analysis of 1H- and 13C-NMR spectra of 1, 2 and their derivatives, and preparation of 2 from 1 by hydrogenation : 20(R), 23(R), 24(R), 25(S), 26(R, S)-16β : 23; 23 : 26; 24 : 25-triepoxy-12β-acetoxy-3β, 26-dihydroxy-9, 19-cyclolanost-7-ene 3-O-β-D-xylopyranoside for 1 and 20(R), 23(R), 24(R), 25(S), 26(R, S)-16β : 23; 23 : 26; 24 : 25-triepoxy-12β-acetoxy-3β, 26-dihydroxy-9, 19-cyclolanostane 3-O-β-D-xylopyranoside for 2.
通过对由 1 制备的 26(S)-O-甲基升麻素 A (1cS)的 X 射线晶体分析、26-O-甲基-3-酮基升麻素 (1dS, 1dR)的负 CD 曲线、1、2 及其衍生物的 1H 和 13C-NMR 光谱的比较分析,以及通过氢化由 1 制备 2,确定了来自单叶升麻的升麻苷 (1) 和升麻素 (2)的绝对立体结构:20(R)、23(R)、24(R)、25(S)、26(R, S)-16β : 23; 23 : 26; 24 : 25-三环氧-12β-乙酰氧基-3β, 26-二羟基-9, 19-环羊毛甾-7-烯 3-O-β-D-吡喃木糖苷为 1,20(R)、23(R)、24(R)、25(S)、26(R, S)-16β :23;23:26;24:25-三环氧-12β-乙酰氧基-3β,26-二羟基-9,19-环羊毛甾烷 3-O-β-D-吡喃木糖苷为 2。