Synthesis and biological activity of both enantiomers of kujigamberol isolated from 85-million-years-old Kuji amber
作者:Yue Qi Ye、Hiroyuki Koshino、Daisuke Hashizume、Yuki Minamikawa、Ken-ichi Kimura、Shunya Takahashi
DOI:10.1016/j.bmcl.2012.05.022
日期:2012.7
and (3) optical resolution of (±)-1 using chromatographical separation of the corresponding camphanates. X-ray crystallographical analysis of p-bromobenzoate obtained from the more polar camphanate that was identical with a natural derivative, revealed natural kujigamberol to have an S-configuration. Both the natural enantiomer and its (R)-antipode showed the same inhibitory activity toward the mutant
通过全合成确定降冰片烷萜类化合物,苦瓜糖醇(1)的完整结构。总合成的关键特征是(1)通过苯甲酰胺的邻位化来安装异戊基;(2)通过RCM反应构建四氢萘酮;(3)使用色谱分离法测定(±)-1的光学拆分度。相应的樟脑。从极性更大的樟脑酸酯获得的对-溴苯甲酸酯的X射线晶体学分析与天然衍生物相同,表明天然的苦瓜酚具有S-构型。天然对映体及其(R)-对映体对突变酵母和HL - 60细胞具有相同的抑制活性,而在C-8和(±)-1的9位上没有烷基的简单类似物则没有这种活性。