Carpanone has been stereoselectively synthesized in 55% yield and six steps from sesamol. The key step of the synthetic sequence is the direct introduction of the propenyl side chain via a Suzuki−Miyaura cross-coupling reaction. The subsequent Pd(II)-catalyzed oxidative coupling yields carpanone as a single diastereoisomer independently of the geometric configuration of the starting precursor. A new mechanism is proposed for this transformation.

中文翻译：

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一种新的基于交叉偶联的甲酮合成方法

已从芝麻酚中以55％的收率和六步合成了立体选择性合成的甲酮。合成序列的关键步骤是通过Suzuki-Miyaura交叉偶联反应直接引入丙烯基侧链。随后的Pd（II）催化的氧化偶合反应产生的卡潘酮为单一非对映异构体，而与起始前体的几何构型无关。为此，提出了一种新的机制。