The 8-epiaphidicolane skeleton (3) was formed in one key reaction by highly diastereoselective tandem transannular Diels-Alder (TADA)-aldol reactions from the trans-trans-cis trienic macrocycle (4). The unnatural derivative (11R)-(-)-8-epi-11-hydroxyaphidicolin (2) was thus constructed, and an original solution to the C16 functionalization problem of many aphidicolin (1) syntheses is presented.
在一个关键的反应中,由反式-反式-
三烯大环(4)的高度非对映选择性串联的环式Diels-Alder(T
ADA)-醛醇缩合反应形成了8-表
二十二烷骨架(3)。因此,构建了非天然衍
生物(11R)-(-)-8-epi-11-羟基aphidicolin(2),并提出了解决许多Aphidicolin(1)合成的C16功能化问题的原始方法。