Total synthesis of natural (-)-ptaquilosin, the aglycon of a potent bracken carcinogen ptaquiloside and the (+)-enantiomer, and their DNA cleaving activities
作者:Hideo Kigoshi、Yoshifumi Imamura、Kazuhiro Mizuta、Haruki Niwa、Kiyoyuki Yamada
DOI:10.1021/ja00061a003
日期:1993.4
The total synthesis of natural (-)-ptaquilosin (2) the aglycon of a potent carcinogen ptaquiloside (1) from bracken fern and its (+)-enantiomer (2) has been achieved starting with (+)-dimenthyl (1R,2R)-cyclopentane-1,2-dicarboxylate. The synthesis proceeds in 20 steps (2.9% overall yield). As the DNA cleaving activities, dienone 4 prepared from natural(-) ptaquilosin (2) was shown to be more efficient
天然 (-)-ptaquilosin (2) 来自蕨菜的强致癌物质 ptaquiloside (1) 的苷元及其 (+)-对映异构体 (2) 的全合成已从 (+)-dimenthyyl (1R,2R) 开始)-环戊烷-1,2-二羧酸酯。合成分 20 步进行(总产率为 2.9%)。作为 DNA 切割活性,从天然 (-) ptaquilosin (2) 制备的二烯酮 4 被证明比从 (+) ptaquilosin (2) 衍生的二烯酮 4 更有效