Total Synthesis of (-)-Neovibsanin G and (-)-14-epi-Neovibsanin G: Towards the Synthesis of 15-O-Methylneovibsanin F and 14-epi-15-O-Methylneovibsanin F
作者:Jeffrey Y. W. Mak、Craig M. Williams
DOI:10.1002/ejoc.201101796
日期:2012.4
The total synthesis of ()-neovibsanin G and ()-14-epi-neovibsanin G has been accomplished, establishing the absolute configurations of these caged diterpenes as 11S, and confirming Fukuyama's postulated biosynthesis of the neovibsanins. Synthetic studies towards 15-O-methylneovibsanin F and 14-epi-15-O-methylneovibsanin F were undertaken based on the hypothesis that these methoxy substituted caged
()-neovibsanin G 和 ()-14-epi-neovibsanin G 的全合成已经完成,确定这些笼状二萜的绝对构型为 11S,并证实了 Fukuyama 对新维布沙宁的假设生物合成。对 15-O-甲基新维沙宁 F 和 14-epi-15-O-甲基新维沙宁 F 的合成研究是基于以下假设进行的,即这些甲氧基取代的笼状新维沙宁是分离产物,通过将甲醇添加到新维沙宁 G 的末端烯烃形成和14-epi-neovibsanin G。然而,结果强烈表明甲氧基笼状neovibsanin 是真正的天然产物。