摘要： Eudesmane derivatives constitute a group of natural compounds widely distributed in the plant kingdom. These kinds of compounds exhibit considerable biological activities such as antifeedant,cell growth inhibitory and plant growth regulating activities,¹ and consequently efficient synthesis of those compounds are a synthetic challenge that has received much attention in the past decades. In recent years a number of eudemane acids have been isolated from natural sources.² However the synthesis of this particular kind of compound have received little attention. In association with our synthesis work on eudesmane-type sesquiterpenes, we have been interested in studying on the synthetic approaches to this kind of compound, in particular the synthesis of compounds 1-6.

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