Studies on the Neutral Constituents of Pachysandra terminalis SIEB. et ZUCC. V. Structures of Pachysandiol-B and Pachysonol, New Friedelin Type Triterpenes
摘要:
从巴基桑德拉终端(Buxaceae 科)中分离出的新型弗里德林型三萜化合物巴基桑二醇-B和巴基松醇的结构经过研究,并根据化学和光谱证据被分别确定为公式 Ia 和 IIa。
Studies on the Neutral Constituents of Pachysandra terminalis SIEB. et ZUCC. V. Structures of Pachysandiol-B and Pachysonol, New Friedelin Type Triterpenes
摘要:
从巴基桑德拉终端(Buxaceae 科)中分离出的新型弗里德林型三萜化合物巴基桑二醇-B和巴基松醇的结构经过研究,并根据化学和光谱证据被分别确定为公式 Ia 和 IIa。
作者:Hiroshi Nozaki、Hideyo Suzuki、Teruhisa Hirayama、Ryoji Kasai、Rong-Yang Wu、Kuo-Hsiung Lee
DOI:10.1016/s0031-9422(00)85505-3
日期:1986.1
Abstract The known compounds maytansine and sitosterol-β- D -glucoside as well as the new triterpenes maytenfoliol and maytenfolic acid were isolated as antileukemic agents fromMaytenus diversifolia . Other triterpenes isolated included the new maytensifolin-A and -B as well as the known friedelin, canophyllal, β-amyrin, canophyllol, pachysonol, 29-hydroxyfriedelan-3-one and 30-hydroxyfriedelan-3-one
Studies on the neutral constituents of Pachysandra terminalis Sieb. et Zucc. VIII. Methyl migration in the dehydration reaction of pachysonol and pachysandiol-B derivatives.
Rearrangements of the 28-methyl group of pachysonol and pachysandiol-B derivatives in the reaction with methanesulfonyl chloride were examined. It was found that two kinds of methyl-migrated products [(IIa, IIb, and VIIIa) and (IVa, IVb, and Xa)] were formed in addition to normally dehydrated products (IIIa, IIIb, and IX), and their structures were elucidated by chemical and spectroscopic methods.