A short, totalsynthesis of (+)-davana acid, (+)-nordavanone and (+)-davanone, which are principle components of davana oil, is described. The notable features are the use of the Evans syn aldol reaction and cyclic ether formation by an intramolecular SN2 displacement reaction as key steps. Evans aldol - cyclic ether - (-)-linalool - natural product - davana oil
描述了作为达瓦那油的主要成分的(+)-达瓦那酸,(+)-去甲达万烷酮和(+)-达万烷酮的简短,全合成。显着特征是使用Evans syn aldol反应和通过分子内S N 2置换反应形成环醚是关键步骤。 Evans Aldol-环醚-(-)-芳樟醇-天然产物-达凡那油
Arteperoxides A–C, tris-normonoterpene–sesquiterpene conjugates with peroxide-bridges from Artemisia judaica exhibiting antiosteoclastogenic activity
known derivatives, hydroxydavanone and davana acid. Structural analysis revealed that arteperoxides A–C were tris-normonoterpene–sesquiterpene conjugates with peroxide bridges. Although davanone derivatives with peroxides, such as a hydroperoxyl and peroxyhemiketal groups, have been isolated from Artemisia species, arteperoxides A–C are the first variations observed to contain peroxide bridges between
对埃及收集的 120 种药用植物提取物进行了抗破骨细胞引导筛选,最终选择了Artemisia judaica L.(菊科)。三种未描述的与达瓦酮相关的萜类化合物,蒿过氧化物 A–C,与两种已知的衍生物羟基达瓦酮和达瓦那酸一起从提取物中分离出来。结构分析显示青蒿过氧化物 A–C 是具有过氧化物桥的三-降单萜-倍半萜偶联物。尽管已从蒿中分离出具有过氧化物(如氢过氧基和过氧半缩酮基团)的达瓦酮衍生物物种中,蒿过氧化物 A-C 是第一个观察到的在两个萜烯衍生单元之间含有过氧化物桥的变体。arteperoxides A 和 B 的绝对构型是根据它们的光谱数据与具有醚键的半合成类似物进行比较研究的。测试了天然和合成化合物的抗破骨细胞活性,青蒿过氧化物 C 和羟基达瓦酮在 20 μM 时比其他化合物更有效。