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。
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.
Studies on the Neutral Constituents of Pachysandra terminalis SIEB. et ZUCC. V. Structures of Pachysandiol-B and Pachysonol, New Friedelin Type Triterpenes
The structures of pachysandiol-B and pachysonol, new friedelin type triterpenes isolated from the neutral fraction of Pachysandra terminalis SIEB. et ZUCC. (Buxaceae), were investigated and assigned to the formulae Ia and IIa, respectively, on the basis of chemical and spectroscopic evidences.
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。