A revised structure for aubergenone, a sesquiterpenoid related to eudesmane: synthesis of 4-<i>epi</i>-aubergenone
作者:Ronald B. Kelly、Sandra J. Alward、K. Suryanarayana Murty、J. B. Stothers
DOI:10.1139/v78-411
日期:1978.10.1
Syntheses of 4-epi-aubergenone, a sesquiterpenoid related to eudesmane, are described. One synthesis afforded this sesquiterpenoid as a racemate (12) whereas another, utilizing (+)-carissone as starting material, afforded an enantiomer (12a). The fact that naturally occurring aubergenone is the C(4) epimer of the thermodynamically more stable synthetic 12 was revealed by the discovery that it was completely
描述了 4-epi-aubergenone,一种与eudesmane 相关的倍半萜类化合物的合成。一种合成提供了作为外消旋物 (12) 的倍半萜类化合物,而另一种使用 (+)-carissone 作为起始材料提供了对映异构体 (12a)。发现天然存在的茄子酮是热力学上更稳定的合成物 12 的 C(4) 差向异构体这一事实表明,它通过碱处理完全转化为后者。这种差向异构关系通过比较两种异构体的核磁共振谱得到证实。引用了需要将茄子酮的结构重新制定为 13 的证据。