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À propos de : Lactone-Directed Intramolecular Diels−Alder Cyclization: Synthesis of trans-Dihydroconfertifolin        

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  • Lactone-Directed Intramolecular Diels−Alder Cyclization: Synthesis of trans-Dihydroconfertifolin
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  • Trienes 1 and 3 were obtained in five steps from ethyl 4-acetoxy-3-oxobutanoate and 6-iodo-3-methyl-1,3-hexadiene. Intramolecular Diels−Alder cyclization of 1 and 3 gave tricyclic lactones 2and 4 as the major products, respectively. The key intermediate 4 was converted in two steps totrans-dihydroconfertifolin (5).
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