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。
Imines and lactones derived from friedelanes and their cytotoxic activity
作者:Mariana G. Aguilar、Grasiely F. Sousa、Fernanda C. G. Evangelista、Adriano P. Sabino、Sidney A. Vieira Filho、Lucienir P. Duarte
DOI:10.1080/14786419.2018.1508137
日期:2020.3.18
Friedelan-3-one (1) and friedelane-3,16-dione (2) isolated from leaves and branches of Maytenus robusta Reissek were subjected to structural modifications via nucleophilic addition to the carbonyl group and Baeyer-Villiger oxidation in order to synthesize potential cytotoxic compounds. The oximes friedelane-3-hydroxyimino (3) and 3-hydroxyiminofriedelan-16-one (4) together with the lactones friedelane-3
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. 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。
Dry ozonation of friedelane afforded 18β,19β-epoxyfriedelane, 19-oxofriedelane, 16-oxofriedelane, 21-oxofriedelane, friedelin, and a new compound, 15-oxofriedelane. Friedelin, on dry ozonation, gave 3,16-dioxofriedelane, 3,19-dioxofriedelane, and new compounds, 18β,19β-epoxyfriedelan-3-one and 3,15-dioxofriedelane. It was shown that the oxidation occurred at D and E rings regioselectively in the dry ozonation.
木屑烷的干臭氧化得到 18β,19β-环氧木屑烷、19-氧代木屑烷、16-氧代木屑烷、21-氧代木屑烷、木屑烷和新化合物 15-氧代木屑烷。 Friedelin 通过干臭氧化,得到 3,16-二氧弗里德兰、3,19-二氧弗里德兰和新化合物 18β,19β-环氧弗里德兰-3-酮和 3,15-二氧弗里德兰。结果表明,在干臭氧氧化中,氧化区域选择性地发生在 D 环和 E 环处。