作者:Raquel M. Cravero、Manuel González-Sierra、Guillermo R. Labadie
DOI:10.1002/hlca.200390223
日期:2003.8
Different convergent approaches to the highly oxygenated sesquiterpene natural product saudin (1), has been investigated. Our strategy has included a Michael addition and aldol condensation reaction as key steps. During the synthetic development, we have found serious steric hindrance when an α-Me-substituted alkyl vinyl ketone was used. Such steric hindrance has been overcome by synthesizing the vinyl
已经研究了对高氧化倍半萜烯天然产物saudin(1)的不同收敛方法。我们的策略包括将迈克尔加成反应和醛醇缩合反应作为关键步骤。在合成开发过程中,我们发现使用α -Me取代的烷基乙烯基酮时存在严重的空间位阻。这种空间位阻已通过阴离子裂解合成乙烯基酮16得以克服,对此已进行了仔细研究。最后,中间体18已经通过一锅反应从乙烯基酮16合成并且已经被环化以获得有希望的三环中间体20。