The divergent synthesis of (+)‐8‐epi‐puupehedione, (+)‐chromazonarol, (+)‐yahazunol, and (+)‐yahazunone is reported. The key steps were a palladium‐catalyzed tandem carbene migratory insertion of an aryl iodide and a drimanal hydrazone, a highly regioselective enol reduction, an oxa‐Stork–Danheiser transposition reaction, an electrocyclization of a conjugated tetraenone, and a redox reaction of dimethoxybenzenes.

中文翻译：

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钯催化串联碳迁移迁移插入生物合成海洋活性类萜。

据报道（+）-8-表位puupehedione，（+）-铬唑烷醇，（+）-yahazunol和（+）-yahazunone的合成不同。关键步骤是钯催化的串联卡宾迁移插入芳基碘化物和十二烷基，高度区域选择性的烯醇还原，氧杂-斯托克-丹海塞尔换位反应，共轭四烯酮的电环化和二甲氧基苯的氧化还原反应。