作者:Hisahiro Hagiwara、Hisashi Uda
DOI:10.1039/p19900001901
日期:——
from an optically active Wieland–Miescher ketone analogue. The ethylene glycol monoacetal of the starting material was converted into the trans-decalone containing the required C-5 and -8a reactant groups via an eight-step reaction sequence. After introduction of a methyl group and then transformation of the angular hydroxymethyl functionality to the protected aldehyde group, an additional α,β-unsaturated
从具有光活性的Wieland-Miescher酮类似物开始,已经实现了(+)-perrottetianal A的全合成,这是一种从地蒿中提取的草型二萜。经由八步反应序列,将起始原料的乙二醇单缩醛转化为含有所需的C-5和-8a反应物基团的反式十氢萘酮。引入甲基,然后将角羟甲基官能团转化为受保护的醛基后,通过Nozaki和Yamamoto's方法引入了另外的α,β-不饱和甲酰基,得到了相应的C-8a单缩醛。最后,水解缩醛提供的(+)-perrottetianal A,其绝对构型为(4a S,5 S,8a R)。